Development of combined simulation device for vehicle lateral acceleration and yaw

Abstract

When driving, the handling stability and active safety of the vehicle are influenced by the Electronic Stability Program (ESP). The ESP electrical performance test is crucial to the research and development of the whole vehicle. Considering the available space and the safety of the road test, today, the static electrical performance test can only be carried out for the ESP, and the dynamic electrical performance test method is lacked. During driving, the vehicle generated lateral acceleration and yaw angle can activate the ESP, however it is difficult to collect these dynamic signals. Therefore, a combined simulation device for lateral acceleration and yaw is designed in the study. The lateral acceleration is calculated by controlling the motor rotation speed of based on the principle of centrifugal acceleration in circular motion. The yaw angle is obtained by adjusting the motor rotation position. Integrated signal combines two simulation principles to simulate two physical signals at the same time. The practical application in the testing field, it is necessary to reasonably design the combined simulation device structure. The device mainly consists of a power device, a transmission mechanism, an actuator, an angle generator and a signal transmission unit. In the process of study, stress analysis is carried out on key components, and the fatigue strength is checked based on the third strength theory. Then the finite element analysis method is applied to verify the component. Finally, the feasibility of the combined simulation device is verified. In the paper, the simulation device can collect the physical signals of various working conditions, which it transmits the signals to the ESP in real time and the vehicle responds according to the signals. The developed device has extremely important practical value for the vehicle electrical performance test.