Modeling and Simulation of Shock Absorber with Fuzzy Uncertain Parameters
Shock absorber is widely used on vehicle. The purposes of the shock absorber are to dissipate the energy accumulated by the suspension spring displacement, controlling thus the vertical motion between vehicle body and tires. The shock absorber has great influence on both ride and handling performance of vehicles, and a great many previous researches have been done on modeling and simulation of the shock absorber, the models and parameters presented in those researches are always based on drawings, observations, measurements, experiences, and so on. However, because of the human mistakes and errors in the manufacture, and a lack of information, certain information and precise values do not exist, uncertainty may result Actually, the uncertainty may have great influence on the shock absorber, so it is necessary to investigate the influence of the uncertainties on the performance of the shock absorber. In this paper, a detailed twin tube shock absorber model was established using Dymola/modelica software. This model contains the piston valve assembly, base valve assembly, rebound chamber, compression chamber, reserve chamber and so on. Then a fuzzy algorithm, which is based on fuzzy set theory, is presented to analyze the response of the shock absorber with uncertain parameters. In this method, uncertain parameters such as the friction between the piston and the chamber, the dimension of the valve disc, the stiffness of the spring, etc., are described mathematically as fuzzy variables and integrated into shock absorber analysis. The simulations are carried out to analyze the performance of the shock absorber with uncertain parameters. The results demonstrate the method is effective to model systems with uncertain parameters.
shock absorber ride handling uncertainty dymola/modelica fuzzy set theory
Jie Zhang Ping He Yunqing Zhang Yang liu Youzhong Xu
Huazhong University of Science & Technology, Wuhan, Hubei 430074, P.R.China Chery Automotive Engineering Research Institute, Wuhu, Anhui 241006, P.R.China
国际会议
太原
英文
145-152
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）