Innovative design of electric vehicle based on open-loop cam steering

Abstract

In order to realize the car to travel according to the expected route, electronic components such as microcomputer and sensor are often used to control the car to achieve the purpose of tracking. Then, can only use the pure mechanical steering structure to achieve the function of reproducing the preset complex long trajectory. In order to solve this problem, the author explores a design scheme based on open-loop cam to control the car to turn. It is required that the designed car can use new energy to drive the corresponding transmission mechanism to ensure that the car passes the mark point in order. In order to meet the corresponding function and travel accuracy, the design of steering system is the key to ensure the design effect. In the design module of the key part cam. Firstly, the preset trajectory is drawn by Bessel curve. Secondly, the geometric relationship between the front wheel and the driven wheel is used to solve the front wheel angle of the car. Thirdly, the cam stroke is obtained according to the steering characteristics of the tangent steering mechanism. Finally, the cam stroke is polarized and enveloped to obtain the design data of the cam that meets the needs of the path. Through simulation analysis, the car 's running trajectory and the preset trajectory have a high degree of repeatability, which meets the established requirements, and also provides design ideas for other mechanical systems with complex strokes.