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Active Suspension Control System

Author: LaoYiRen
Tutor: GaoWenZhi
School: Tianjin University
Course: Power Machinery and Engineering
Keywords: Active suspension Fuzzy Control PID control Simulation
CLC: U463.33
Type: Master's thesis
Year: 2007
Downloads: 506
Quote: 8
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Abstract


Vehicle suspension performance has a direct impact on the exercise of the car ride and handling stability , at present, widely used on car passive suspension system , because the parameters can not be adjusted for changing work environment difficult to meet the expectations of the automotive performance requirements . Therefore, in order to overcome the passive suspension restrictions on car performance improvements in recent years, there has been active suspension system . Active suspension according to changing conditions in real time and take the initiative to adjust the suspension to produce the desired control to suppress the vibration of the body , so that the optimal damping suspension in the state , to simultaneously improve vehicle ride comfort and handling stability purposes. This is an active control suspension system provides a new and effective fuzzy control strategy can be very good to improve the vehicle performance. The fuzzy control method is particularly suitable for vehicle suspension such as time-varying , nonlinear, complex systems under different conditions . Meanwhile, also designed a PID control algorithm based on active suspension system , and with the effects of fuzzy control strategies were compared , can be seen fuzzy active control superiority. The use of vehicle dynamics theory, a dynamic model of active suspension system , while establishing an integral form of white noise B, D two road input mathematical and simulation models. With body acceleration , wheel suspension dynamic deflection and dynamic load performance evaluation as a suspension of the vehicle suspension control system in Matlab / Simulink simulation environment simulation studies, the suspension obtained in the time domain dynamic response. By contrast, the analysis of the two active suspension control system performance characteristics. Through the simulation results analysis, the use of fuzzy control theory of this new control strategy for the active suspension control over other control methods is more reasonable and feasible . It is compared with PID control and the control of the body acceleration , wheel suspension dynamic deflection and dynamic load control better performance and robustness of the control method is more suitable for nonlinear , time-varying vehicle suspension system . The proposed new fuzzy control strategy for the automotive active suspension control theory provides a new idea , but for active suspension Experimental Research and product development to provide theoretical basis.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Travel System > Suspension
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