Research On Control Algorithm Of Semi-Active Vehicle-Mounted Vibration Isolation Platform

With the development of science and technology,high-precision instruments and equipment have been applied in many fields,such as industrial production,national defense and security,geological exploration,etc.As a result,there is a developing demand for isolation platforms that can carry these devices and provide a stable environment.The semi-active vehicle-mounted anti-vibration platform based on electromagnetic valve type continuous damping control system(CDC)can reduce the road vibration in real time,so as to deal with various terrain environments.Therefore,in order to further improve the safety and accuracy of the equipment on the vibration isolation platform,the semi-active vibration isolation system on the platform will be studied in this paper to ensure that the platform can absorb external vibration and shock better.The details of the work are as follows:The structural design and strength check of the anti-vibration platform are carried out,and the dynamic model of the platform is built according to the designed structure and Newton-Eular method.At the same time,the vehicle carrying the platform and the working road environment,such as random road profile,convex road profile,etc.Then,the dynamic characteristics of the anti-vibration platform are analyzed,which lays a foundation for the research of semi-active suspension.The structure and working principle of the electromagnetic valve type continuous variable damper are analyzed,the mathematical model of the damper is built,and the performance test is carried out.Finally,a PID controller of the damper is designed,and the controller has good control effect.The control system of semi-active anti-vibration platform is designed by using skyhook damping algorithm and LQR optimal control algorithm.And the LQR control algorithm is optimized by using cuckoo search optimization algorithm.The simulation results show that the optimal LQR control algorithm has a better vibration isolation effect.Finally,machining the mechanical structure of the platform,selecting the type of shock absorber,air spring system,controller and so on,finally building the material object of the vibration isolation platform,and testing it.The feasibility of the control algorithm is verified.In this paper,the optimized semi-active control algorithm is applied to the vehicle-mounted semi-active anti-vibration platform.The feasibility and effectiveness of the algorithm are verified.The results show that the optimized semi-active control algorithm can significantly improve the vibration reduction capability of the platform.