A Robust Design Method for Technical Parameters of Automobile Chassis Based on Full Life Cycle

Abstract

The invention provides an automotive chassis technical parameter robust design method based on a full life circle. The method comprises the following steps that (1) finished automobile parameters are input; (2) an optimal virtual prototype model is determined; (3) a mathematical model is built, wherein design variables include a controllable variable, an environmental noise factor and dynamics test parameters; (4) individual performance preferences are determined, and after the individual performance preferences are aggregated in a layered mode, an optimal robust solution is obtained through an overall performance preference function; (5) the design result is verified. Compared with the prior art, the automotive chassis technical parameter robust design method based on the full life circle has the advantages that the various information parameters in the development design stage, the manufacturing stage and the usage stage serve as the design variables, the optimal robust solution is obtained through the overall performance preference function formed by aggregating all the individual performance preferences, and optimal performance and robust performance of the full life cycle of an automotive chassis are ensured. In addition, an optimal chassis prototype model determined through simulation comparison serves as a design platform, and optimality of a chassis structure type is ensured.

Description

[0001] Technical field: [0002] The invention relates to a method for designing an automobile chassis, in particular to a robust design method for an automobile chassis, belonging to the technical field of automobile design. [0003] Background technique: [0004] In the current design of automobile chassis, empirical method, comparative method, and method based on chassis single-system or multi-system integrated design are generally adopted. The empirical method is mainly to design certain technical parameters of the chassis based on empirical formulas; the comparative method is mainly to compare and analyze with reference models to determine relevant technical parameters; the design method based on chassis single system or multi-system integration optimization is mainly based on the chassis Steering system, suspension system, braking system and other systems or multiple systems are optimally designed or robustly optimized for the platform. These methods generally only use c...

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Problems solved by technology

These methods generally only use certain technical parameters of the chassis as design variables, and take the dynamic test parameters of one or several operating states of the vehicle as the objective function. In the robust design, only installation errors, manufacturing errors, etc. are considered. Uncertain information in the manufacturing stage does not integrate and optimize the information in each stage of the chassis life cycle, so it cannot guarantee the optimal performance and robust performance of the product in the full life cycle, that is, the development and design stage, manufacturing stage, and use stage

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