Multi-flexibility Force Control System Analysis And Control Strategy Research

Electro-hydraulic servo force control systems are widely used in aerospace,mining machinery and other fields.Under large inertia and heavy load conditions,electro-hydraulic servo force control systems often affect the response speed of the system due to the existence of multiple flexibility coupling problems,Tracking accuracy and system stability.This paper establishes a mathematical model including multiple flexibility links for the electro-hydraulic servo force control system,analyzes the influence of multiple flexibility links,establishes a joint simulation model,designs control algorithms,and conducts experimental research to improve the effect of multiple flexibility links on electro-hydraulic servo The influence of the force control system.The content is mainly divided into the following points:1.Establish the flow equation of the electro-hydraulic servo valve spool valve,the flow continuity equation of the hydraulic cylinder,and the force balance equation including multiple flexibility links,draw the block diagram of the system,establish its mathematical model,and further derive the system State space equation.2.Establish a mathematical model for the electro-hydraulic servo force control system without connection stiffness;compare and analyze the influence of structural flexibility on the electro-hydraulic servo force control system for different stiffness conditions;according to the established system state space equation,Perform Lyapunov stability analysis to verify that the system is stable.3.Establish the electro-hydraulic servo force control system without connection stiffness and the multi-flexibility coupling electro-hydraulic servo force control system AMESim/simulink software co-simulation model,set the corresponding parameters of the electro-hydraulic servo valve,hydraulic cylinder and other components,and design The PID controller improves the stability and tracking accuracy of the system.4.Aiming at the problems of poor stability and external interference factors in the electro-hydraulic servo force control system with multiple flexibility links,a robust controller optimized based on differential evolution algorithm is designed,software co-simulation and experimental bench research are carried out,using different The input signal verifies that the controller effectively improves the control performance of the system;finally,the experimental platform is built,and the experimental platform research confirms the effectiveness of the designed algorithm.