The 4-D model of half-vehicle active suspension system was established based on the vehicle dynamics theory。By using optimal control theory,the LQG controller was designed and the matlab+simulink simulation was carried outo The results showed that active suspension have a good ride comfort than the passive suspension。

Glass lifter is one of the most important attachments of the door system,reliability and ease of operation of its performance automotive safety and comfort is an important factor.Cut from the structural principle of the lifter,the main reason for the failure of A21 series models lifter proposed corrective measures. In order to optimize the entire lift system,to extend the life of it slots,reduce and eliminate after-sale customer complaints,and put forward a set of effective methods.

Based on finite element theory,the 3D model of a bearing block was established with ANSYS software.By using Block Lanczos method,the modal analysis of the bearing block was carried out and the first four natural frequencies and vibration modes were obtained.The results provide a guidance for the optimization design and dynamics analysis of the bearing block.

为缩短设计周期、提高产品质量并降低产品开发成本,文中利用ADAMS软件建立汽车双横臂独立悬架模型并进行仿真分析,研究了车轮定位参数随车轮跳动的变化规律,并据此对悬架定位参数进行了优化设计。

结合某轻型越野车车架的设计过程,建立了车架三维数字化模型,通过HyperMesh对4种工况特别是扭转工况下的结构刚度、模态进行了有限元分析,得到了车架前十阶固有频率,用于指导轻型越野车车架结构设计,提高结构的可靠性。

The 1-D model of bolt was established through the ANSYS software based on non-linear theory and the creep analysis was carried out under high temperature。The results provide a guidance for the effective application of the the bolt.

The 3-D model of axle and axle bed was established through the ANSYS software based on finite element theory。By using MPC method,the assembled parts was connected and the mode analysis was carried outo The results are compared with these of a corresponding bonding and intergrative structure and provide a guidance for the mode analysis and dynamic analysis of the complex assembly structures。

以评价道路工程质量为例,研究了以标准区间灰数评价指标量值为区间灰数的决策问题;并以熵权为主要手段计算了各属性的灰熵值,从而确定各评价指标的权重。