Research on Idle Jitter Control of a Light Truck Steering Wheel Based on Sensitivity Analysis

Abstract

The steering wheel of a light truck has a jitter problem in the idle condition. We used modal test to analyze the jitter reason under idle condition. It is found that the modal frequency of the steering wheel is close to the second order ignition frequency of the engine so the resonance of the steering wheel appears. In order to reduce the steering wheel vibration, we combined with the finite element analysis method and sensitivity analysis method. We adjusted the structure of the steering wheel and the thickness of the instrument panel beam to optimize the structure, thereby changing the natural frequency of the steering wheel. Measures works and the natural frequency was far from the second order ignition frequency of the engine. Finally, the effectiveness and rationality of the improvements were verified through tests.