汽车转弯制动性能的模拟计算

本文是一篇研究汽车转弯制动性能模拟计算方法的专题论文。首先建立了11自由度的汽车动力学模型,模拟转弯制动开环试验方法,建立了非线性微分方程组,其初始条件通过计算汽车作圆周运动时的稳态转向特性求出。文中详细地介绍了各有关参量的计算方法,然后用四阶龙格-库塔法求出微分方程组的数值解,因此能够详尽地描述和研究各重要参数的变化情况及其对转弯制动性能的影响。最后给出四个典型算例,用以说明计算的可信程度。

Modeling and Computation of Vehicle Performance on Combined Steering and Braking Maneuvers

This paper is especially designated to the study method used to modeland compute vehicle performance while the vehicle is in the combinedsteering and braking action. A dynamic model containing 11 DOF is de-veloped which simulate the open-loop testing of combined vehicle stee-ring and braking maneuvers. A set of differential equations is derivedto describe the maneuvers, initial conditions of the equations are obtai-ned from the steady state steering motion on a circular path. The calcu-lating method of relative parameters is introduced in detail. The equa-tions are solved with the fourth order Runge Kutta method. So that, itis possible to describe and analyse the variety of vehicle parameters vs.time in the process combined steering and braking and their influenceto the performance. Finally four typical examples are given to clarifythe reliability of the method.