Robustness Analysis and Optimization of Steering Wheel Nibble during High-Speed Driving
In response to the steering wheel nibble problem caused by high-speed driving of vehicles,this paper proposes a method that combines the distribution of nibble response under large sample size and the analysis of nibble response magnitude.The mechanism of steering wheel nibble is analyzed and the principle of robustness analysis is explained.A chassis hard point,tire,suspension structure,suspension dynamic stiffness,and steering system model of a certain pickup truck model is constructed.The accuracy of the model is verified through actual measurement and CAE analysis of suspension modes.The excitation source,transmission path,and response of the steering wheel nibble problem are studied,and the contribution of each component to steering wheel nibble is determined.The key components that affect steering wheel nibble are identified.Finally,by optimizing the steering wheel moment of inertia and steering gear damping parameters,the problem of steering wheel nibble during high-speed driving is effectively solved,which improves the robustness of problem control and enhances driving comfort.This study provides important reference for the early design avoidance and later optimization ideas of steering wheel nibble problems.
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