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Structural deformations are one of the most significant factors that affects machine tool (MT) positioning accuracy. These induced errors are complex for accurate representation by a model, nevertheless they need to be evaluated and predicted in order to increase the machining performance. This paper presents a novel approach to calibrate a machine tool in real-time, analyzing the thermo-mechanical errors through fiber Bragg grating (FBG) sensors embedded in the MT frame. The proposed configuration consists of an adaptronic structure of passive materials, Carbon Fiber Reinforced Polymers (CFRP), equipped with FBG sensors that are able to measure in real-time the deformed conditions of the frame. By using a proper thermo-mechanical kinematic model, the displacement of the end effector may be predicted and corrected when it is subjected to external undesired factors. By starting from a set of Finite Element (FE) simulations to develop a model able to describe the MT structure stresses, a prototype has been fabricated and tested. The aim of this study was to compare the numerical model with the experimental tests using FBG sensors. The experimental campaign has been performed by varying the structure temperature over time and measuring the tool tip point (TTP) positions. The obtained results showed a substantial matching between the real and the predicted position of the TTP, thereby confirming the effectiveness of the proposed system.
Francesco Aggogeri; Alberto Borboni; Rodolfo Faglia; Angelo Merlo; Nicola Pellegrini. A Kinematic Model to Compensate the Structural Deformations in Machine Tools Using Fiber Bragg Grating (FBG) Sensors. Applied Sciences 2017, 7, 114 .
AMA StyleFrancesco Aggogeri, Alberto Borboni, Rodolfo Faglia, Angelo Merlo, Nicola Pellegrini. A Kinematic Model to Compensate the Structural Deformations in Machine Tools Using Fiber Bragg Grating (FBG) Sensors. Applied Sciences. 2017; 7 (2):114.
Chicago/Turabian StyleFrancesco Aggogeri; Alberto Borboni; Rodolfo Faglia; Angelo Merlo; Nicola Pellegrini. 2017. "A Kinematic Model to Compensate the Structural Deformations in Machine Tools Using Fiber Bragg Grating (FBG) Sensors." Applied Sciences 7, no. 2: 114.
Structural deformations are one of the most significant factor that affects machine tool (MT) positioning accuracy. These induced errors are complex to be represented by a model, nevertheless they need to be evaluated and predicted in order to increase the machining performance. This paper presents a novel approach to calibrate a machine tool in real-time, analyzing the thermo-mechanical errors through Fibre Bragg Grating (FBG) sensors embedded in the MT frame. The proposed configuration consists of an adaptronic structure of passive materials, Carbon Fibre Reinforced Polymers (CFRP), equipped by FBG sensors that are able to measure in real-time the deformed conditions of the frame. By using a proper thermo-mechanical kinematic model, the displacement of the end effector may be predicted and corrected when it is subjected to external undesired factors. By starting from a set of FE simulations to develop a model able to describe the MT structure stresses, a prototype has been fabricated and tested. The scope was to compare the numerical model with the experimental tests using FBG sensors. The experimental campaign has been performed varying the structure temperature over time and measuring the tool tip point (TTP) positions. The obtained results showed a substantial matching between the real and the predicted position of TTP confirming the effectiveness of the proposed calibration system.
Francesco Aggogeri; Alberto Borboni; Rodolfo Faglia; Angelo Merlo; Nicola Pellegrini. A Kinematic Model to Compensate the Structural Deformations in Machine Tools Using Fibre Bragg Grating (FBG) Sensors. 2016, 1 .
AMA StyleFrancesco Aggogeri, Alberto Borboni, Rodolfo Faglia, Angelo Merlo, Nicola Pellegrini. A Kinematic Model to Compensate the Structural Deformations in Machine Tools Using Fibre Bragg Grating (FBG) Sensors. . 2016; ():1.
Chicago/Turabian StyleFrancesco Aggogeri; Alberto Borboni; Rodolfo Faglia; Angelo Merlo; Nicola Pellegrini. 2016. "A Kinematic Model to Compensate the Structural Deformations in Machine Tools Using Fibre Bragg Grating (FBG) Sensors." , no. : 1.
Stroke patients are often affected by hand impairment. Literature shows different experiences of robotic rehabilitation that is able to prove an intensive and effective therapy. A preliminary analysis of the state of the art evidenced lacks in hand robotic rehabilitation devices. Thus, this work proposes a new rehabilitation device for hand rehabilitation based on a compliant transmission. The mechanical power generator is not on the hand to reduce the weight of the device. The mechanical model of the system is descripted. Experimental results on 126 stroke patients evidenced the efficacy of this device
Alberto Borboni; Maurizio Mor; Rodolfo Faglia. Gloreha—Hand Robotic Rehabilitation: Design, Mechanical Model, and Experiments. Journal of Dynamic Systems, Measurement, and Control 2016, 138, 111003 .
AMA StyleAlberto Borboni, Maurizio Mor, Rodolfo Faglia. Gloreha—Hand Robotic Rehabilitation: Design, Mechanical Model, and Experiments. Journal of Dynamic Systems, Measurement, and Control. 2016; 138 (11):111003.
Chicago/Turabian StyleAlberto Borboni; Maurizio Mor; Rodolfo Faglia. 2016. "Gloreha—Hand Robotic Rehabilitation: Design, Mechanical Model, and Experiments." Journal of Dynamic Systems, Measurement, and Control 138, no. 11: 111003.
The work described involves the implementation of a testing bench prototype, used to control the behavior of heart valves, taking into account the characteristics of the blood.
Maurizio Mor; Gianluigi Petrogalli; Tadeusz Mikolajczyk; Rodolfo Faglia. Study of a Test Bench for Artificial Heart Valves: Description and Preliminary Results. Applied Mechanics and Materials 2015, 783, 17 -27.
AMA StyleMaurizio Mor, Gianluigi Petrogalli, Tadeusz Mikolajczyk, Rodolfo Faglia. Study of a Test Bench for Artificial Heart Valves: Description and Preliminary Results. Applied Mechanics and Materials. 2015; 783 ():17-27.
Chicago/Turabian StyleMaurizio Mor; Gianluigi Petrogalli; Tadeusz Mikolajczyk; Rodolfo Faglia. 2015. "Study of a Test Bench for Artificial Heart Valves: Description and Preliminary Results." Applied Mechanics and Materials 783, no. : 17-27.