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Prof. Dr. Xing Shen
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, Jiangsu Province, China

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Research Keywords & Expertise

0 piezoelectric actuators
0 Smart Materials and Structures
0 Shape memory alloy actuators
0 Functional devices for aerospace engineering
0 Morphing wing structures

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Short communication
Published: 21 June 2021 in Ionics
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Iron carbide (Fe3C) has gained significant attention for use in energy storage applications. Furthermore, using a nano-scale metal as the catalyst can reduce the formation of a solid electrolyte interface (SEI), thus enhancing capacity. For these reasons, hierarchical Fe/Fe3C/C nanofibers are prepared by electrospinning with subsequent thermal treatment and used as the anodes for lithium ion batteries (LIBs). These anodes demonstrate a good rate and high capacities. At 0.1 A g−1, the Fe/Fe3C/C nanofiber electrode maintains 518 mA h g−1 after 100 cycles. When tested at 1 A g−1, the discharge capacity gradually increases and reaches 663 mA h g−1 after 1200 cycles. This work demonstrates the possibility to design and develop transition metal carbides (TMCs) for use in energy storage.

ACS Style

Tong Xiang; Zhi Chen; Zhixin Rao; Mingge Yan; Zhijun Feng; Xibao Li; Huiyong Yang; Juntong Huang; Xing Shen. Hierarchical Fe/Fe3C/C nanofibers as anodes for high capacity and rate in lithium ion batteries. Ionics 2021, 27, 3663 -3669.

AMA Style

Tong Xiang, Zhi Chen, Zhixin Rao, Mingge Yan, Zhijun Feng, Xibao Li, Huiyong Yang, Juntong Huang, Xing Shen. Hierarchical Fe/Fe3C/C nanofibers as anodes for high capacity and rate in lithium ion batteries. Ionics. 2021; 27 (8):3663-3669.

Chicago/Turabian Style

Tong Xiang; Zhi Chen; Zhixin Rao; Mingge Yan; Zhijun Feng; Xibao Li; Huiyong Yang; Juntong Huang; Xing Shen. 2021. "Hierarchical Fe/Fe3C/C nanofibers as anodes for high capacity and rate in lithium ion batteries." Ionics 27, no. 8: 3663-3669.

Original paper
Published: 08 February 2021 in Ionics
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SiO2-based anodes for lithium ion batteries (LIBs) suffer from low conductivity and volume change in charge/discharge processes. It is reported that reasonable amorphous and nanometric characteristics can effectively improve the activity of SiO2 for Li+ storage. So, highly active [email protected] nanofibers were prepared by electrospinning. Using X-ray diffraction (XRD), its amorphous characteristics were revealed. The results from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that it was a nanofiber structure. As an anode for LIBs, the [email protected] nanofibrous electrode showed the discharge capacities of 675 and 188 mAh g−1 at 1 A g−1 (1000the cycle) and 10 A g−1 (5000th cycle), respectively. Even at 50 A g−1, it still maintained 88 mA h g−1 at 60,000 cycles, showing excellent stability and high rate.

ACS Style

Zhi Chen; Tong Xiang; Qingming Xiong; Li Chen; Huiyong Yang; Zhijun Feng; Xibao Li; Xing Shen; Juntong Huang. Highly active [email protected] nanofiber: high rate and long cycling for lithium ion batteries. Ionics 2021, 27, 1385 -1392.

AMA Style

Zhi Chen, Tong Xiang, Qingming Xiong, Li Chen, Huiyong Yang, Zhijun Feng, Xibao Li, Xing Shen, Juntong Huang. Highly active [email protected] nanofiber: high rate and long cycling for lithium ion batteries. Ionics. 2021; 27 (4):1385-1392.

Chicago/Turabian Style

Zhi Chen; Tong Xiang; Qingming Xiong; Li Chen; Huiyong Yang; Zhijun Feng; Xibao Li; Xing Shen; Juntong Huang. 2021. "Highly active [email protected] nanofiber: high rate and long cycling for lithium ion batteries." Ionics 27, no. 4: 1385-1392.

Article
Published: 08 February 2021 in Journal of Polymer Science
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In this paper, the temperature memory effect (TME) in a commercial ethylene‐vinyl acetate copolymer (EVA) is characterized via differential scanning calorimetry (DSC) tests. Three temperatures, which are 35, 60, and 85°C representing temperatures below glass transition (Tg), within Tg and within melting (Tm), respectively, are included for the investigation. It is found that TME in polymers is not as reported to be limited at around either Tg or Tm only, the effective temperature range for TME could be actually much wider that covers from below Tg to up to Tm. In addition, it is concluded that higher heating stop temperature (Ts) erases the memory of previous lower ones in this EVA. Hysteresis (described by ΔT) between the temperature of turning points (Tts) and their corresponding Tss is always observable. However, the ΔT decreases at higher Ts.

ACS Style

Tao Xi Wang; Lei Peng Song; Yun Hui Geng; Xing Shen. Temperature memory effect from below glass transition to up to melting range in an ethylene‐vinyl acetate copolymer. Journal of Polymer Science 2021, 138, 50571 .

AMA Style

Tao Xi Wang, Lei Peng Song, Yun Hui Geng, Xing Shen. Temperature memory effect from below glass transition to up to melting range in an ethylene‐vinyl acetate copolymer. Journal of Polymer Science. 2021; 138 (24):50571.

Chicago/Turabian Style

Tao Xi Wang; Lei Peng Song; Yun Hui Geng; Xing Shen. 2021. "Temperature memory effect from below glass transition to up to melting range in an ethylene‐vinyl acetate copolymer." Journal of Polymer Science 138, no. 24: 50571.

Journal article
Published: 22 October 2020 in Precision Engineering
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The lever-type mechanism is one of the most widely used compliant mechanisms in precision engineering applications. To achieve large amplification ratios, the lever-type mechanisms are often connected in series. However, overstress during the deformation process of the mechanism appears frequently, resulting in the undesired deformation and the distortion of amplification ratios. Also, the enveloping area of the lever-type mechanism is relatively large, which limits its further application. This paper presents a novel combined compliant mechanism for translation amplification, which consists of a bridge mechanism and a two-stage lever mechanism. The compact mechanism could avoid overstress while maintaining a large amplification ratio. Firstly, the design of the mechanism is introduced. The corresponding amplification ratio is modeled and verified by the finite element method. This model includes the vertical drift of flexure hinges in the mechanism, which is consistent with the motion direction of the combined mechanism. Also, the flexures in the levers are characterized. For the sake of avoiding overstress and attaining a large amplification ratio, an optimization of the model is conducted by the genetic algorithm. The optimization results show that more than 100% improvement on the amplification ratio has been achieved, and the maximum stress of the mechanism is admissible. The optimized compliant mechanism is fabricated and tested. Quasi-static and dynamic experiments demonstrate that the amplification factor shows a good agreement with the analytical model.

ACS Style

Xing Shen; Lei Zhang; Dongmei Qiu. A lever-bridge combined compliant mechanism for translation amplification. Precision Engineering 2020, 67, 383 -392.

AMA Style

Xing Shen, Lei Zhang, Dongmei Qiu. A lever-bridge combined compliant mechanism for translation amplification. Precision Engineering. 2020; 67 ():383-392.

Chicago/Turabian Style

Xing Shen; Lei Zhang; Dongmei Qiu. 2020. "A lever-bridge combined compliant mechanism for translation amplification." Precision Engineering 67, no. : 383-392.

Short communication
Published: 30 September 2020 in Materials Letters
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Promoting in-situ growth on the Ni foam to form an integrated electrode could prove useful for improving the area-specific capacity and adhesion between the collector and active material. Here, a NiO/NiS2 nanosheet integrated electrode was designed and obtained by a hydrothermal method. The integrated electrode consisted of a mixture of NiS2 and NiO and was in the form of a nanosheet. The electrode showed high area-specific capacities as the anode for alkaline ion batteries and could achieve 1.51 (150th cycle), 0.93 (100th cycle), and 0.11 mAh•cm−2 (30th cycle) for Li+/Na+/K+ storage.

ACS Style

Zhi Chen; Tong Xiang; Zhijun Feng; Xibao Li; Juntong Huang; Xing Shen. A NiO/NiS2 nanosheet integrated electrode for high area specific capacity alkaline metal battery. Materials Letters 2020, 283, 128771 .

AMA Style

Zhi Chen, Tong Xiang, Zhijun Feng, Xibao Li, Juntong Huang, Xing Shen. A NiO/NiS2 nanosheet integrated electrode for high area specific capacity alkaline metal battery. Materials Letters. 2020; 283 ():128771.

Chicago/Turabian Style

Zhi Chen; Tong Xiang; Zhijun Feng; Xibao Li; Juntong Huang; Xing Shen. 2020. "A NiO/NiS2 nanosheet integrated electrode for high area specific capacity alkaline metal battery." Materials Letters 283, no. : 128771.

Research article
Published: 19 September 2020 in Shock and Vibration
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In wind tunnel tests, the cantilever sting is usually used to support aircraft models because of its simple structure and low aerodynamic interference. However, in some special conditions, big-amplitude and low-frequency vibration would occur easily on the model not only in the pitch direction but also in the yaw direction, resulting in inaccurate data and even damage of the supporting structure. In this paper, aiming at suppressing the vibration in pitch and yaw plane, a multidimensional system identification and active vibration control system on the basis of piezoelectric actuators is established. A vibration monitoring method based on the strain-displacement transformation (SDT) matrix is proposed, which can transform strain signals into vibration displacements. The system identification based on chirp-Z transform (CZT) is applied to improve the adaptability and precision of the building process for the system model. After that, the hardware platform as well as the software control system based on the classical proportional-derivative (PD) algorithm is built. A series of experiments are carried out, and the results show the exactness of the vibration monitoring method. The system identification process is completed, and the controller is designed. Vibration control experiments verify the effectiveness of the controller, and the results indicate that vibrations in pitch and yaw directions are attenuated apparently. The spectrum power is reduced over 14.8 dB/Hz, which prove that the multidimensional identification and active vibration control system has the capability to decline vibration from different directions.

ACS Style

Yi Yu; Xing Shen; Yun Huang. Multidimensional System Identification and Active Vibration Control of a Piezoelectric-Based Sting System Used in Wind Tunnel. Shock and Vibration 2020, 2020, 1 -15.

AMA Style

Yi Yu, Xing Shen, Yun Huang. Multidimensional System Identification and Active Vibration Control of a Piezoelectric-Based Sting System Used in Wind Tunnel. Shock and Vibration. 2020; 2020 ():1-15.

Chicago/Turabian Style

Yi Yu; Xing Shen; Yun Huang. 2020. "Multidimensional System Identification and Active Vibration Control of a Piezoelectric-Based Sting System Used in Wind Tunnel." Shock and Vibration 2020, no. : 1-15.

Journal article
Published: 04 September 2020 in Polymers
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In this paper, a thermo-responsive shape memory effect in a polyvinyl chloride thermoset foam is characterized. Excellent shape recovery performance is observed in foam samples programmed both at room temperature and above their transition temperature. The conversion of porous structures in the foam from closed-cell to open-cell after a shape memory effect cycle is revealed via a series of specially designed oil-dripping experiments and optical images of the micro pores. Programming the strain higher than 20% results in an apparent increase in open-cell level, whereas programming temperatures have almost no influence.

ACS Style

Tao Xi Wang; Lu Lu Chang; Yun Hui Geng; Xing Shen. Thermo-Responsive Shape Memory Effect and Conversion of Porous Structure in a Polyvinyl Chloride Foam. Polymers 2020, 12, 2025 .

AMA Style

Tao Xi Wang, Lu Lu Chang, Yun Hui Geng, Xing Shen. Thermo-Responsive Shape Memory Effect and Conversion of Porous Structure in a Polyvinyl Chloride Foam. Polymers. 2020; 12 (9):2025.

Chicago/Turabian Style

Tao Xi Wang; Lu Lu Chang; Yun Hui Geng; Xing Shen. 2020. "Thermo-Responsive Shape Memory Effect and Conversion of Porous Structure in a Polyvinyl Chloride Foam." Polymers 12, no. 9: 2025.

Journal article
Published: 30 May 2020 in Composite Structures
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The mechanical performances of sandwiched morphing skin used for morphing aircraft are principally determined by the cellular substructure undertaking morphing stress. In this paper, in order to guide the design of sandwiched morphing skins utilized in different morphing applications, several optimal topologies of cellular-based structures are calculated, and the mechanical properties of them are evaluated. Initially, the topology optimization technique is utilized to minimize stiffness in the direction of deformation. This is followed by establishing 3D models through post-processing. Then the experiments and finite element analyses are performed to evaluate the designs and compare them with conventional regular honeycomb structure as well as zero Poisson’s ratio structure. Among them, a novel load transmitting block is designed for transferring shear load using axial movement. The simulated and experimental results show the superiority of optimized topologies. Also, the consistency of them guarantees the reliability of finite element model. Based on it, this research investigates the mechanical performances of periodic cellular structures and the influence depending on the number of cells. The results of the effective transverse modulus, the effective shear modulus, the out-of-plane displacement and the twist angle give support for the development of sandwiched morphing skins in real applications.

ACS Style

Lulu Chang; Xing Shen; Yuke Dai; Taoxi Wang; Lei Zhang. Investigation on the mechanical properties of topologically optimized cellular structures for sandwiched morphing skins. Composite Structures 2020, 250, 112555 .

AMA Style

Lulu Chang, Xing Shen, Yuke Dai, Taoxi Wang, Lei Zhang. Investigation on the mechanical properties of topologically optimized cellular structures for sandwiched morphing skins. Composite Structures. 2020; 250 ():112555.

Chicago/Turabian Style

Lulu Chang; Xing Shen; Yuke Dai; Taoxi Wang; Lei Zhang. 2020. "Investigation on the mechanical properties of topologically optimized cellular structures for sandwiched morphing skins." Composite Structures 250, no. : 112555.

Journal article
Published: 20 May 2020 in Journal of Alloys and Compounds
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Due to the high price of noble metal catalysts, there is an urgent demand for the development of inexpensive and earth-abundant electrocatalysts for the oxygen evolution reaction (OER). It is known that a hierarchical structure can effectively increase the catalytic area and improve the charge transfer of the OER electrocatalyst, while Ni foam is known to be an advantageous substrate. Therefore, in this work a hierarchical Mn–[email protected](OH)3 nanofiber array was prepared by the hydrothermal reaction and immersion at room temperature, and X-ray diffraction and transmission electron microscopy measurements were carried out to characterize the microstructure of the nanofiber array. X-ray photoelectron spectroscopy was used to analyze the valence states of the array, demonstrating the successful synthesis of the Mn–[email protected](OH)3 nanofiber. As the catalyst for OER, the Mn–[email protected](OH)3 nanofiber array showed a low overpotential of 195 mV at a current density of 10 mA cm−2 as well as high stability (80 h) in the durability test. This work demonstrates the feasibility of the design of hierarchical nanostructure electrodes with high electrochemical performance for catalytic reactions and various battery applications.

ACS Style

Zhi Chen; Zhihui Hu; Dejian Zhu; Zhijun Feng; Xibao Li; Juntong Huang; Xing Shen. Construction of hierarchical Mn–[email protected](OH)3 nanofiber array for oxygen evolution reaction. Journal of Alloys and Compounds 2020, 847, 155560 .

AMA Style

Zhi Chen, Zhihui Hu, Dejian Zhu, Zhijun Feng, Xibao Li, Juntong Huang, Xing Shen. Construction of hierarchical Mn–[email protected](OH)3 nanofiber array for oxygen evolution reaction. Journal of Alloys and Compounds. 2020; 847 ():155560.

Chicago/Turabian Style

Zhi Chen; Zhihui Hu; Dejian Zhu; Zhijun Feng; Xibao Li; Juntong Huang; Xing Shen. 2020. "Construction of hierarchical Mn–[email protected](OH)3 nanofiber array for oxygen evolution reaction." Journal of Alloys and Compounds 847, no. : 155560.

Journal article
Published: 29 August 2019 in Aerospace Science and Technology
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In wind tunnel tests, the sting with a model and a balance installed forms an elastic beam. To reduce the aerodynamic interference, the slenderness ratio of the sting is usually small, which obviously results in low damping of the whole structure. In that case, violent oscillation appears quickly while the sting is exposed to varying aerodynamic loads, which finally leads to inaccurate data and even damage to the structure. In this paper, the vibration of the model-balance-sting system was analyzed experimentally, and the concepts of active pitching damper were detailed in this paper. Based on independent modal space control, linear quadratic regulators were designed with identified state-space models. The active pitching damper was successfully validated by exerting impulse loading in model preparation bay firstly and then tested in a transonic wind tunnel. Experimental results show that the maximum attenuation of vibration reached 91% in standard deviation and extension of the angle of attack was 6°. Moreover, wind tunnel tests proved the effectiveness of the active pitching damper working on different test configurations, which indicates the superiority of the damper.

ACS Style

Lei Zhang; Yuke Dai; Xing Shen; Xiping Kou; Li Yu; Bo Lu. Research on an active pitching damper for transonic wind tunnel tests. Aerospace Science and Technology 2019, 94, 105364 .

AMA Style

Lei Zhang, Yuke Dai, Xing Shen, Xiping Kou, Li Yu, Bo Lu. Research on an active pitching damper for transonic wind tunnel tests. Aerospace Science and Technology. 2019; 94 ():105364.

Chicago/Turabian Style

Lei Zhang; Yuke Dai; Xing Shen; Xiping Kou; Li Yu; Bo Lu. 2019. "Research on an active pitching damper for transonic wind tunnel tests." Aerospace Science and Technology 94, no. : 105364.

Journal article
Published: 03 July 2019 in Review of Scientific Instruments
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In wind tunnel tests, a long cantilever sting is usually used to support the test model. However, it is vulnerable to violent oscillation without an effective damping device. In this paper, a piezoelectric-based sting damper designed for solving the vibration problem in wind tunnel tests is detailed, especially its system identification process, which is generally a difficult challenge in practice. Besides, a new hardware platform for various instruments is established and a real-time control software system is built to verify the feasibility and practicability of the whole vibration control process. Furthermore, aiming at measuring the suppression of the first two order’s vibration, the impulse stimulus test as well as the transonic wind tunnel test are carried out to evaluate the capability of the sting damper. The results show the excellent performance of the Zoom-frequency response function algorithm in identifying the damper, based on which suitable parameters of PD controller are acquired and the damping coefficient of the sting increases over 60 times in impulse stimulus. In addition, the superiority of the sting damper in suppressing vibration is proved by the transonic wind tunnel test, in which the maximum testing angle of attack enlarges under different Mach numbers.

ACS Style

Yuke Dai; Xing Shen; Lei Zhang; Yi Yu; Xiping Kou; Li Yu. System identification and experiment evaluation of a piezoelectric-based sting damper in a transonic wind tunnel. Review of Scientific Instruments 2019, 90, 075102 .

AMA Style

Yuke Dai, Xing Shen, Lei Zhang, Yi Yu, Xiping Kou, Li Yu. System identification and experiment evaluation of a piezoelectric-based sting damper in a transonic wind tunnel. Review of Scientific Instruments. 2019; 90 (7):075102.

Chicago/Turabian Style

Yuke Dai; Xing Shen; Lei Zhang; Yi Yu; Xiping Kou; Li Yu. 2019. "System identification and experiment evaluation of a piezoelectric-based sting damper in a transonic wind tunnel." Review of Scientific Instruments 90, no. 7: 075102.

Original paper
Published: 03 May 2019 in Journal of Vibration Engineering & Technologies
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Detrimental vibration makes aircraft and spacecraft vulnerable to structural damage and payload instability. Traditional vibration isolator with sole resonant frequency risks to amplify vibrations whose frequencies are close to the resonant frequency of the vibration isolator, ending up in complex conundrums in the domain of aeronautics and astronautics. This research prompts to provide a universal solution to this conundrum by putting forward a vibration isolator capable of self-tuning its resonant frequency. The conception, design, and frequency tunability verification experiments were hence implemented in this research. Annular metal rubbers with different parameters were prepared and experimentally analyzed to determine the appropriate choice for resonant frequency tuning. It was discernible that both the increase of wire diameter and the relative density ratio of the metal rubbers could confer an augmentation of resonant frequency on the vibration isolator. The resonant frequency tuning was conducted by shape memory alloy actuators applying compressive loads to annular metal rubbers so as to change the stiffness of the isolator. The resonant frequency identification experiment demonstrated that the resonant frequency-tunable vibration isolator is versatile in resonant frequency tuning between 52 Hz and 113 Hz. The resonant frequency tunability ensures the avoidance of vibration amplification, improvising an ultimate solution to broad-banded vibration attenuation problems ranging from low frequency to high frequency vibration (e.g. 100 Hz) in aeronautical and astronautical environments.

ACS Style

Xing Shen; Yuchen Chen; Jinqiang Wang; Jiefeng Li; Lulu Chang; Yiyu Sun. Design, Experiment and Verification of Resonant Frequency-Tunable Vibration Isolator Based on Annular Metal Rubbers and Shape Memory Alloy Actuators. Journal of Vibration Engineering & Technologies 2019, 7, 277 -289.

AMA Style

Xing Shen, Yuchen Chen, Jinqiang Wang, Jiefeng Li, Lulu Chang, Yiyu Sun. Design, Experiment and Verification of Resonant Frequency-Tunable Vibration Isolator Based on Annular Metal Rubbers and Shape Memory Alloy Actuators. Journal of Vibration Engineering & Technologies. 2019; 7 (3):277-289.

Chicago/Turabian Style

Xing Shen; Yuchen Chen; Jinqiang Wang; Jiefeng Li; Lulu Chang; Yiyu Sun. 2019. "Design, Experiment and Verification of Resonant Frequency-Tunable Vibration Isolator Based on Annular Metal Rubbers and Shape Memory Alloy Actuators." Journal of Vibration Engineering & Technologies 7, no. 3: 277-289.

Accepted manuscript
Published: 28 November 2018 in Smart Materials and Structures
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A refined resonance method, which is based on the theoretical model of a piezoelectric stack under constraint boundary condition is developed and proposed to measure the properties of piezoelectric stack which are relevant to the prestress. The method can transcend the limitation of the conventional resonance method in which the piezoelectric stack under measurement must be free to vibrate. An experimental setup has been designed and built according to the theoretical model, and the properties of a piezoelectric stack are characterized for a wide range of prestress to demonstrate the validity of this method. The experimental results show that properties including relative dielectric constant, piezoelectric constant, electromechanical coupling coefficient and elastic compliance exhibit strong pressure dependence. Among them, the piezoelectric constant measured by this method is compared with measurement by traditional static method, and the deviation between the refined and conventional method is less than 3.25% for a pressure range from 0 MPa to 6 MPa, which indicates that the experimental results of the two test methods are consistent and the presented theoretical model for piezoelectric stack under preload manifests accuracy by means of the correctness and feasibility verification of the proposed method though cross validation and relevant discussions. Consequently, the refined resonance method could be extended to analyze the variation of piezoelectric stack properties that occurs under operational conditions with varied pressure.

ACS Style

Yang Li; Xing Shen; Yuchen Chen. Design, experiment and verification of a refined resonance method for property measurement of piezoelectric stack. Smart Materials and Structures 2018, 28, 015033 .

AMA Style

Yang Li, Xing Shen, Yuchen Chen. Design, experiment and verification of a refined resonance method for property measurement of piezoelectric stack. Smart Materials and Structures. 2018; 28 (1):015033.

Chicago/Turabian Style

Yang Li; Xing Shen; Yuchen Chen. 2018. "Design, experiment and verification of a refined resonance method for property measurement of piezoelectric stack." Smart Materials and Structures 28, no. 1: 015033.

Journal article
Published: 23 October 2018 in Chinese Journal of Aeronautics
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The conception of aircraft morphing wings thrives in aeronautics since the appearance of shape memory alloys (SMAs). An aircraft morphing wing device, manipulated by an SMA actuator, inherits the intrinsic nonlinear hysteresis from the SMA actuator, ending up with control disadvantages. Conventionally, systems with SMA actuators are constrained to bi-stable states to bypass the hysteresis region. Rather than retreating a morphing wing device to bi-stable states, this paper is dedicated to transcend the morphing wing device beyond the customary limit. A methodology of discrete Preisach modeling, which identifies the hysteresis of the morphing wing device, is proposed herein. An array of discrete equal-distance points is applied to the Preisach plane in order to derive the Preisach density over the partitioned unit of the Preisach plane. Discrete Preisach modeling is fulfilled by the discrete first-order reversible curve (DFORC). By utilizing the discrete Preisach model, the aircraft morphing wing device is simulated; the validity and accuracy of discrete Preisach modeling are demonstrated by contrasting the simulated outcome with experimental data of the major hysteretic loop and the wingspan-wise displacement over time; a comparison between simulation and experimental results exhibits consistency. Afterwards, a hysteresis compensation strategy put forward in this paper is implemented for quasi-linear control of the aircraft morphing wing device, which manifests a compensated shrinking hysteresis loop and attains the initiative of extending the morphing range to the intrinsic hysteretic region.

ACS Style

Yuchen Chen; Xing Shen; Jiefeng Li; Jinjin Chen. Nonlinear hysteresis identification and compensation based on the discrete Preisach model of an aircraft morphing wing device manipulated by an SMA actuator. Chinese Journal of Aeronautics 2018, 32, 1040 -1050.

AMA Style

Yuchen Chen, Xing Shen, Jiefeng Li, Jinjin Chen. Nonlinear hysteresis identification and compensation based on the discrete Preisach model of an aircraft morphing wing device manipulated by an SMA actuator. Chinese Journal of Aeronautics. 2018; 32 (4):1040-1050.

Chicago/Turabian Style

Yuchen Chen; Xing Shen; Jiefeng Li; Jinjin Chen. 2018. "Nonlinear hysteresis identification and compensation based on the discrete Preisach model of an aircraft morphing wing device manipulated by an SMA actuator." Chinese Journal of Aeronautics 32, no. 4: 1040-1050.

Research article
Published: 20 September 2018 in Shock and Vibration
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In wind tunnel tests, cantilever stings are often used as model-mount in order to reduce flow interference on experimental data. In this case, however, large-amplitude vibration and low-frequency vibration are easily produced on the system, which indicates the potential hazards of gaining inaccurate data and even damaging the structure. This paper details three algorithms, respectively, Classical PD Algorithm, Artificial Neural Network PID (NNPID), and Linear Quadratic Regulator (LQR) Optimal Control Algorithm, which can realize active vibration control of sting used in wind tunnel. The hardware platform of the first-order vibration damping system based on piezoelectric structure is set up and the real-time control software is designed to verify the feasibility and practicability of the algorithms. While the PD algorithm is the most common method in engineering, the results show that all the algorithms can achieve the purpose of over 80% reduction, and the last two algorithms perform even better. Besides, self-tuning is realized in NNPID, and with the help of the Observer/Kalman Filter Identification (OKID), LQR optimal control algorithm can make the control effort as small as possible. The paper proves the superiority of NNPID and LQR algorithms and can be an available reference for vibration control of wind tunnel system.

ACS Style

Xing Shen; Yuke Dai; Mingxuan Chen; Lei Zhang; Li Yu. Active Vibration Control of the Sting Used in Wind Tunnel: Comparison of Three Control Algorithms. Shock and Vibration 2018, 2018, 1 -10.

AMA Style

Xing Shen, Yuke Dai, Mingxuan Chen, Lei Zhang, Li Yu. Active Vibration Control of the Sting Used in Wind Tunnel: Comparison of Three Control Algorithms. Shock and Vibration. 2018; 2018 ():1-10.

Chicago/Turabian Style

Xing Shen; Yuke Dai; Mingxuan Chen; Lei Zhang; Li Yu. 2018. "Active Vibration Control of the Sting Used in Wind Tunnel: Comparison of Three Control Algorithms." Shock and Vibration 2018, no. : 1-10.

Research paper
Published: 18 June 2018 in Structural and Multidisciplinary Optimization
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Sandwiched morphing skin, composed of cellular based structure and flexible face-sheets, is one of the most promising concepts which can be used for morphing aircraft. Apparently, cellular based structure, with ability to endure aerodynamic pressure and morphing capability, is the most critical component of sandwiched morphing skin. This paper presents a design process for optimal topologies of cellular based structures for two-dimensional morphing skins, and this design procedure is effortless to be adjusted to be applied under different sets of boundary and loading conditions. The topology optimization problem formulation is established based on the simplified isotropic material with penalization (SIMP) interpolation method coupled with the method of moving asymptotes (MMA), meanwhile, Heaviside filter is adopted for reducing the occurrence of transition elements. After several iterations, various optimized topologies of unit cell are calculated corresponding to different morphing applications such as span morphing, sweep morphing and two-dimensional morphing. The mechanical properties of cellular topologies are investigated by comparing with conventional regular honeycomb structure and zero Poisson’s ratio structure via simulation after establishing 3D models of topologies. Results indicate that the design method using topology optimization technique is entirely feasible and optimal topologies of cellular based structure appear to provide superior performance.

ACS Style

Lulu Chang; Xing Shen. Design of cellular based structures in sandwiched morphing skin via topology optimization. Structural and Multidisciplinary Optimization 2018, 58, 2085 -2098.

AMA Style

Lulu Chang, Xing Shen. Design of cellular based structures in sandwiched morphing skin via topology optimization. Structural and Multidisciplinary Optimization. 2018; 58 (5):2085-2098.

Chicago/Turabian Style

Lulu Chang; Xing Shen. 2018. "Design of cellular based structures in sandwiched morphing skin via topology optimization." Structural and Multidisciplinary Optimization 58, no. 5: 2085-2098.

Journal article
Published: 30 December 2016 in International Journal of Aeronautical and Space Sciences
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ACS Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. An autonomous synchronized switch damping on inductance and negative capacitance for piezoelectric broadband vibration suppression. International Journal of Aeronautical and Space Sciences 2016, 17, 501 -517.

AMA Style

Ehtesham Mustafa Qureshi, Xing Shen, Lulu Chang. An autonomous synchronized switch damping on inductance and negative capacitance for piezoelectric broadband vibration suppression. International Journal of Aeronautical and Space Sciences. 2016; 17 (4):501-517.

Chicago/Turabian Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. 2016. "An autonomous synchronized switch damping on inductance and negative capacitance for piezoelectric broadband vibration suppression." International Journal of Aeronautical and Space Sciences 17, no. 4: 501-517.

Journal article
Published: 24 September 2015 in International Journal of Applied Electromagnetics and Mechanics
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ACS Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. Self-powered synchronized switch damping on negative capacitance for broadband vibration suppression of flexible structures. International Journal of Applied Electromagnetics and Mechanics 2015, 49, 105 -121.

AMA Style

Ehtesham Mustafa Qureshi, Xing Shen, Lulu Chang. Self-powered synchronized switch damping on negative capacitance for broadband vibration suppression of flexible structures. International Journal of Applied Electromagnetics and Mechanics. 2015; 49 (1):105-121.

Chicago/Turabian Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. 2015. "Self-powered synchronized switch damping on negative capacitance for broadband vibration suppression of flexible structures." International Journal of Applied Electromagnetics and Mechanics 49, no. 1: 105-121.

Journal article
Published: 30 June 2015 in International Journal of Aeronautical and Space Sciences
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ACS Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. Power output and efficiency of a negative capacitance and inductance shunt for structural vibration control under broadband excitation. International Journal of Aeronautical and Space Sciences 2015, 16, 223 -246.

AMA Style

Ehtesham Mustafa Qureshi, Xing Shen, Lulu Chang. Power output and efficiency of a negative capacitance and inductance shunt for structural vibration control under broadband excitation. International Journal of Aeronautical and Space Sciences. 2015; 16 (2):223-246.

Chicago/Turabian Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. 2015. "Power output and efficiency of a negative capacitance and inductance shunt for structural vibration control under broadband excitation." International Journal of Aeronautical and Space Sciences 16, no. 2: 223-246.

Journal article
Published: 30 June 2015 in International Journal of Control and Automation
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ACS Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. A Low Frequency Vibration Control by Synchronized Switching on Negative Capacitance and Voltage Sources. International Journal of Control and Automation 2015, 8, 121 -138.

AMA Style

Ehtesham Mustafa Qureshi, Xing Shen, Lulu Chang. A Low Frequency Vibration Control by Synchronized Switching on Negative Capacitance and Voltage Sources. International Journal of Control and Automation. 2015; 8 (6):121-138.

Chicago/Turabian Style

Ehtesham Mustafa Qureshi; Xing Shen; Lulu Chang. 2015. "A Low Frequency Vibration Control by Synchronized Switching on Negative Capacitance and Voltage Sources." International Journal of Control and Automation 8, no. 6: 121-138.