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The Analytic Target Cascading (ATC) is an effective method for solving hierarchical Multidisciplinary Design Optimization (MDO) problems. At the same time, this method suffers from poor convergence and low accuracy, which is caused by the inconsistency of system constraints. In this paper, a novel ATC method based on dynamic relaxation factor is proposed. The dynamic relaxation factor of consistency constraint is added in the system level and is adjusted by the deviation of the linking variables between the levels to ensure the feasible region of the design space. The effectiveness and accuracy of this method are verified by a mathematical example. This method is used to solve the lightweight problem of the trussed front part of the vehicle body frame based on active and passive safety to achieve the collaborative optimization of lightweight trussed frame, crash safety, and aerodynamic characteristics. The important value of the novel ATC method based on dynamic relaxation factor in engineering applications is proven.
Tingting Wang; Mengjian Wang; Xia Li; Dongchen Qin. Multidisciplinary Lightweight Optimization for Front Impact Structure of Body Frame Based on Active and Passive Safety. Mathematics 2021, 9, 907 .
AMA StyleTingting Wang, Mengjian Wang, Xia Li, Dongchen Qin. Multidisciplinary Lightweight Optimization for Front Impact Structure of Body Frame Based on Active and Passive Safety. Mathematics. 2021; 9 (8):907.
Chicago/Turabian StyleTingting Wang; Mengjian Wang; Xia Li; Dongchen Qin. 2021. "Multidisciplinary Lightweight Optimization for Front Impact Structure of Body Frame Based on Active and Passive Safety." Mathematics 9, no. 8: 907.
With the increase in car ownership and the increasing pressure of energy conservation and emission reduction, the lightweighting of cars has become an important development direction for traditional cars to reduce emissions and increase the endurance of electric vehicles. Aiming at the lightweight design of automobile crash safety structure, this paper proposes a variable section and multiple materials vehicle lightweight design framework based on collision safety. Taking a certain type of racing car frame as the research object, the lightweight design is carried out, and the optimal design scheme of racing car frame with good collision safety performance is obtained. Taking the lightest frame mass as the design goal, the optimal latin square design and response surface model are used to optimize the thickness of each pipe frame, and the lightweight frame optimization scheme based on the improvement of collision safety performance is obtained. Finally, under the premise that the peak acceleration of the cockpit is reduced by 20.02% and the amount of intrusion at the brake pedal is reduced by 25.31%, weight reduction of 14.38% is achieved. Based on the actual engineering situation, this paper constructs a lightweight design framework for automobiles based on collision safety, and provides an efficient optimization process for lightweight design of automobiles.
Tingting Wang; Ruoyan Dong; Shan Zhang; Dongchen Qin. Research on Lightweight Design of Automobile Collision Safety Structure Based on Multiple Materials. Journal of Physics: Conference Series 2020, 1670, 012004 .
AMA StyleTingting Wang, Ruoyan Dong, Shan Zhang, Dongchen Qin. Research on Lightweight Design of Automobile Collision Safety Structure Based on Multiple Materials. Journal of Physics: Conference Series. 2020; 1670 (1):012004.
Chicago/Turabian StyleTingting Wang; Ruoyan Dong; Shan Zhang; Dongchen Qin. 2020. "Research on Lightweight Design of Automobile Collision Safety Structure Based on Multiple Materials." Journal of Physics: Conference Series 1670, no. 1: 012004.
As one of the important components of intelligent warehousing logistics, Automated Guided Vehicles (AGVs) have greatly improved the efficiency of warehousing operations. AGVs are responsible for the delivery of goods in warehousing and logistics, and it is extremely important to maintain a stable running state. In this paper, an AGV in-situ steering dynamic model is established according to the actual size, and the center deviation phenomenon during AGV steering is theoretically analyzed to obtain the parameters that affect the AGV’s in-situ steering stability. Secondly, the dynamic simulation method is used to analyze the law of the stability of the AGV in-situ steering parameters to verify the correctness of the theoretical derivation equation. According to the analysis results, the motion parameters related to AGV in-situ steering are analyzed, and a reasonable design scheme is given. Based on the optimized fork-type AGV, the AGV in-situ steering control strategy is studied, and the adaptive fuzzy PID control algorithm is used to construct the fork-type AGV steering control system. Then the software and hardware design of the AGV steering control system is carried out. The optimized fork-type AGV has been turned to work stably after commissioning, meeting the actual work requirements.
Tingting Wang; Ruoyan Dong; Rui Zhang; Dongchen Qin. Research on Stability Design of Differential Drive Fork-Type AGV Based on PID Control. Electronics 2020, 9, 1072 .
AMA StyleTingting Wang, Ruoyan Dong, Rui Zhang, Dongchen Qin. Research on Stability Design of Differential Drive Fork-Type AGV Based on PID Control. Electronics. 2020; 9 (7):1072.
Chicago/Turabian StyleTingting Wang; Ruoyan Dong; Rui Zhang; Dongchen Qin. 2020. "Research on Stability Design of Differential Drive Fork-Type AGV Based on PID Control." Electronics 9, no. 7: 1072.