本文针对复杂曲面汽车车身设计的特点提出开发可视化设计环境的设想。在使设计师充分掌握、便捷使用有关信息的原则下，提出建立虚拟基础车身几何模型和动力学分析模型数据库以及对CAD/CAE统一的数据管理和信息交流开发环境。设计了有关模块的功能、属性分配，并指出以信息管理中侧重相似类比的方法可实现复杂曲面汔车车身的几何建模和动力学分析的结合而促进设计敏捷化。

This paper presents the method to deal with numerical time response analysis of a moving clamp that is running over a roller battery support of a cable transport system, which is a dynamics procedure involving time and form varying nonholonomic kinematics constraints as well as inter-excitation between parts. The numerical results are compared with test ones.

A dynamic model is developed for a cable supporting roller battery of cable transport systems, which allows the calculation of eigenfrequencies and modes under the restoring action of a pretensioned cable and subsequently enables the response investigation during the successive passage of a clamp (with supported vehicles) over the rollers. An analytical method is developed and the analytical results are compared with test results: the calculated eigenmodes and eigenfrequencies are in satisfying agreement with our test results.

In this paper, a lateral controller is designed for four-wheel steering (4WS) vehicle. The linear lateral dynamics of 4WS vehicle is deduced and then analyzed aided with three-dimensional graphs. To improve vehicle handling and stability at high speed, a multi-objective H∞ optimal control algorithm is presented while yaw rate is the only feedback signal. Simulation shows that the sideslip angle, yaw rate and lateral acceleration of the 4WS vehicle follow and maintain preferable characteristics. The 4WS vehicle is agile and consistent with the steering input and does not understeer excessively.