Multi-source Drive/Transmission System Electromechanical Coupling Modeling and Synchronization Characteristic Research

2018 ◽  
Vol 54 (7) ◽  
pp. 63
Author(s):  
Ruizhi SHU
Keyword(s):  
Electromechanical Coupling ◽  
Transmission System

scholarly journals Research on operating domain optimization of power split hybrid electric vehicle based on global bifurcation and chaos threshold

2020 ◽  
Vol 12 (9) ◽  
pp. 168781402095460
Author(s):  
Dou Lei ◽  
Cai Yingfeng ◽  
Chen Long ◽  
Shi Dehua ◽  
Hu Donghai ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Electromechanical Coupling ◽  
Transmission System ◽  
Optimization Scheme ◽  
Domain Optimization ◽  
Driving Mode ◽  
Power Split ◽  
Non Linear ◽  
Hybrid Electric

The power-split hybrid electric vehicle (PS-HEV) has multiple working modes to maintain high operation efficiency according to different conditions. The main modes involved in the vehicle driving process are pure electric mode and the hybrid driving mode. Because the electromechanical coupling problem is involved in the above two working modes, the transmission system exhibits strong non-linear characteristics. If the operation range of the engine and motor are unreasonable, the rotor system will vibrate and become instability. In this paper, the non-linear dynamic equations of the electromechanical coupling of the transmission system are established for electric driving mode and hybrid driving mode. The closed-homoclinic phase trajectory equation at the center point of the disturbance-free Hamilton system is determined. The chaotic thresholds for the pure electric and hybrid driving modes are derived through the Melnikov’s method to obtain the optimal working domain of the engine and motor. Finally, numerical simulation analysis is conducted to verify the feasibility of the work domain optimization scheme. Simulation results show that the proposed engine and motor working area optimization scheme can effectively avoid the homoclinic bifurcation in the PS-HEV during the driving process and prevent the vehicle from entering the chaotic state.

Integrated Design of Airborne Radar Servo System Based on MATLAB/SIMULINK

2011 ◽  
Vol 204-210 ◽  
pp. 17-20
Author(s):  
Ding Zhen Li ◽  
Rui Min Jin
Keyword(s):  
Optimization Model ◽  
Electromechanical Coupling ◽  
Integrated Design ◽  
Control Design ◽  
Servo System ◽  
Coupling Model ◽  
Transmission System ◽  
Airborne Radar ◽  
Matlab Simulink ◽  
And Control

This thesis is according to the pitching part of airborne radar servo system. The electromechanical coupling model and optimization model which includes structure parameters and control parameters are built up based on model of mechanism transmission system and electricity control system. The dynamics model of mechanism transmission system includes the nonlinearity of backlash and is considered the influence of parameters for dynamics properties in structure of the mechanism transmission system. The method of integrated structure and control design is applied on the optimization model using GA. Simulation is done based on MATLAB/SIMULINK. Simulation results show that the method of integrated structure and control design is feasible and effective in servo system.

scholarly journals Nonlinear Torsional Vibration Analysis and Control of Semidirect Electromechanical Coupling Transmission System in Shearer

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Song Jiang ◽  
Wei Li ◽  
Lianchao Sheng ◽  
Jiajun Chen ◽  
Min Li
Keyword(s):  
Hopf Bifurcation ◽  
Torsional Vibration ◽  
Electromechanical Coupling ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Nonlinear Damping ◽  
Transmission System ◽  
Concentrated Mass ◽  
Mass Model ◽  
Hurwitz Stability

The nonlinear torsional vibration and instability oscillation caused by nonlinear damping in the shearer electromechanical coupling cutting transmission system in shearer driven by the permanent magnet synchronous motor (PMSM) is investigated in this paper. The electromechanical coupling transmission system in the shearer is equivalent to a concentrated mass model for the purpose of establishing the system dynamic model by the Lagrange–Maxwell equation. Then, the Routh–Hurwitz criterion is used to determine the torsional vibration critical point and stability region for the Hopf bifurcation for the cutting transmission system. According to the Routh–Hurwitz stability criterion, the Hopf bifurcation type and the effect of the supercritical Hopf bifurcation in the torsional vibration of the cutting transmission system are analyzed. Furthermore, based on the washout filter, the Hopf bifurcation controller is designed for suppressing the transmission system’s large vibration amplitude and unstable oscillation. In addition, the influences of the linear gain and nonlinear gain on the bifurcation point and the limit cycle amplitude are discussed. Finally, the numerical simulation results indicate the effectiveness of the designed controller. The research achievements can provide a theoretical basis for design or optimize the cutting transmission system of high-reliability shearer driven by PMSM.

Stability analysis of a nonlinear electromechanical coupling transmission system with time delay feedback

2016 ◽  
Vol 86 (3) ◽  
pp. 1863-1874 ◽  
Author(s):  
Shuang Liu ◽  
Shuangshuang Zhao ◽  
Ben Niu ◽  
Jianxiong Li ◽  
Haibin Li
Keyword(s):  
Stability Analysis ◽  
Time Delay ◽  
Electromechanical Coupling ◽  
Transmission System ◽  
System With Time Delay

Electromechanical Coupling Modeling in Permanent Magnet AC Servo-Driven Precision Gear Transmission System

2011 ◽  
Vol 52-54 ◽  
pp. 1375-1381
Author(s):  
Wei Zhou ◽  
Li Hong Lin ◽  
Xiao An Chen
Keyword(s):  
Mathematical Model ◽  
Permanent Magnet ◽  
Electromechanical Coupling ◽  
Coupling Effect ◽  
Permanent Magnet Synchronous Motor ◽  
Transmission System ◽  
Gear Transmission ◽  
Ac Servo ◽  
Gear Transmission System ◽  
Driven System

Electromechanical coupling effect must be considered in the dynamic analysis of permanent magnet AC servo-driven precision gear transmission system. According to the global coupling and local coupling analysis in servo-driven system, the global electromechanical coupling relation diagram of whole system and the local electromechanical coupling relation diagram of the permanent magnet synchronous motor-precision gear transmission subsystem are established. For this subsystem, a physical model is built up. And a mathematical model is constituted by using Lagrange-Maxwell equation, that is the dynamic equation of the subsystem. The mathematical model can provide theoretical basis for follow-up researches.

Study on Ultrasonic Micromateriel Transmission System

2011 ◽  
Vol 55-57 ◽  
pp. 2109-2112
Author(s):  
Jun Kao Liu ◽  
Wei Shan Chen ◽  
Xiao Yu Lv
Keyword(s):  
Electromechanical Coupling ◽  
Vibration Mode ◽  
Longitudinal Vibration ◽  
Coupling Efficiency ◽  
Transmission System ◽  
Prototype System ◽  
Bending Vibration ◽  
Fem Method ◽  
Sandwich Type ◽  
Longitudinal Vibration Mode

A new type ultrasonic materiel transmission system is proposed in this study. In this new design, bending vibration traveling wave is generated in an elastic pipe by using two uniform sandwich type longitudinal vibration transducers. Thus, elliptical trajectory motions can be formed at particles on the pipe wall, which can drive the materiel by frictional force. The adopting of sandwich transducer in this device can gain large vibration amplitude and improve the electromechanical coupling efficiency. The structure and working principle of the proposed design are introduced. The transducer and the pipe are designed and analyzed by using FEM method. The longitudinal vibration mode of the transducer and the bending vibration mode of the pipe are analyzed, and the resonant frequencies of these two modes are tuned to be close. A prototype system is fabricated and measured.

Torque distribution method based on vibration instability of PS-HEV transmission system

2020 ◽  
Vol 234 (14) ◽  
pp. 3491-3503
Author(s):  
Yingfeng Cai ◽  
Lei Dou ◽  
Donghai Hu ◽  
Long Chen ◽  
Dehua Shi ◽  
...  
Keyword(s):  
Dynamic Equation ◽  
Hybrid Electric Vehicle ◽  
Response Curve ◽  
Electromechanical Coupling ◽  
Transmission System ◽  
Frequency Response Curve ◽  
Torque Distribution ◽  
Nonlinear Dynamic Equation ◽  
Amplitude Frequency Response ◽  
Power Split

The power-split hybrid electric vehicle has multiple working modes, which can be switched to different working mode according to different working conditions. The main switching process involved in the vehicle driving is the switch from the pure electric mode to the hybrid driving mode. This paper studies the mode switching process involved in the power-split hybrid electric vehicle driving process, and a nonlinear dynamic equation of the electromechanical coupling of the corresponding transmission system is established. Then the multi-scale method is employed to solve the dynamic equation, and the amplitude-frequency response curve is drawn. According to the curve, the effects of load, mechanical input excitation of the engine and motor electromagnetic excitation on the electromechanical coupling torsional vibration of the transmission system are studied. The engine and motor torque distribution schemes are obtained by analyzing the amplitude-frequency response curve of the torsional vibration characteristics of the system. The analysis results show that the vibration instability phenomenon of the transmission system can be avoided by establishing the nonlinear dynamic equation of the transmission system, analyzing the vibration characteristics of the vibration system, and optimizing the torque distribution of a PS-HEV at different working modes.

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