Vol.28 No.12 张蕾等：基于蒙特卡罗法的轨迹再现转向机构稳健性设计 .1177. [10]张洪秋.汽车设计.北京：机械工业出版社，1992 Robust design for locus generating steering mechanism based on Monte Carlo method ZHA NG Lei),ZHA NG Wenming,SHEN Yanhua) 1)Civil and Environmental Engineering School,University of Science and Technology Beijing.Beijing 100083.China 2)Automotive Engineering Department,Tianjin University of Technology and Education.Tianjin 300222,China ABSTRACI A robust mathematical design model based on the response surface method was established for steering trapezoid mechanism.In the model,movement precision during steering course was chosen as the objective function:kingpins distance,axles distance,trapezoid mechanism's bottom angle and steering arm length were defined as the design variables:minimum transmission angle and maximum angle error were considered as the restraint condition.Steering mechanism of a truck was optimum designed by adopting the method of Monte Carlo optimization design with distribution parameters.The results of fixed optimization design and Monte Carlo optimization design were compared.It is shown that the minimum transmitted an- gle derived from the Monte Carlo optimization design method is larger and the system has well transmitted performance and steering performance while the difference of steering error is small,furthermore movement precision is assured when design variables are little varied. KEY WORDS steering mechanism:robust design:locus generating:Monte Carlo method［10］ 张洪秋．汽车设计．北京：机械工业出版社‚1992 Robust design for locus generating steering mechanism based on Monte Carlo method ZHA NG Lei 1‚2）‚ZHA NG Wenming 1）‚SHEN Y anhua 1） 1） Civil and Environmental Engineering School‚University of Science and Technology Beijing‚Beijing100083‚China 2） Automotive Engineering Department‚Tianjin University of Technology and Education‚Tianjin300222‚China ABSTRACT A robust mathematical design model based on the response surface method was established for steering trapezoid mechanism．In the model‚movement precision during steering course was chosen as the objective function；kingpins distance‚axles distance‚trapezoid mechanism’s bottom angle and steering arm length were defined as the design variables；minimum transmission angle and maximum angle error were considered as the restraint condition．Steering mechanism of a truck was optimum designed by adopting the method of Monte Carlo optimization design with distribution parameters．The results of fixed optimization design and Monte Carlo optimization design were compared．It is shown that the minimum transmitted an￾gle derived from the Monte Carlo optimization design method is larger and the system has well transmitted performance and steering performance while the difference of steering error is small‚furthermore movement precision is assured when design variables are little varied． KEY WORDS steering mechanism；robust design；locus generating；Monte Carlo method Vol．28No．12 张蕾等： 基于蒙特卡罗法的轨迹再现转向机构稳健性设计 ·1177·