Electro-Hydraulic Actuator Load Simulation Control System

This paper discusses how to design and realize the electric actuator hydraulic loading system.Firstly a mathematical model of the loading system is established. On the basis of single channel loading system's mathematical model, the system's dynamic characteristic was analyzed. Strong position disturbance force is a chief problem facing aerodynamic loading system, and it is also an important target to evaluate the quality of the loading system. So how to design a proper control strategy to reduce position disturbance force is a key factor.Secondly, this paper elaborates the cause of the position disturbance force, analyzes the factors which influences the position disturbance force, and the position disturbance has been diminished ultimately by adopting Structure Invariability principle as feedforward compensation to the disturbance. Related simulation shows that the control strategy was feasible.Theoretically feedforward compensation can eliminate the position disturbance, but the high-order differential of the compensator is hard to realize in physical form. Besides, electro-hydraulic servo system has the characters of non-linearity and parameter uncertainty, which makes the real practical effect of that control method poor.Thirdly, Aiming at the disadvantages of traditional control method, the application in the control system of GCMAC has been studied in Chapter IV. The paper combines the Optimal Control theory with GCMAC neural network, proposes the Optimal Control strategy based on the GCMAC neural network and proves that the close-loop system has gradual stability. The results of simulation in which control strategy was applied to the electro-hydraulic servo system indicate that the control strategy is effective. The control system' s dynamic performance has been improved markedly compared with the pure classical control.Then distributed computer control system including two layers is designed based on the control theory discussed above. The realization is illustrated from the aspects of hardware and software. Problems appearing at work and tackling methods are bothpresented.At the end of this paper, the test methods, test result and analysis result of the system performance test are provided. The test results show that the system's performance meets most requirements in the design index.