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The extra torque of electrohydraulic load simulator loading system affects its performance seriously. To eliminate the extra torque, the pressure servo valve control load simulator is proposed. This article establishes the electro-hydraulic load simulator mathematical model based on flow servo valve and pressure servo valve, analyzes the mechanism of overcoming extra torque load and simulation, provides...
To improve the identification accuracy of complex system, a genetic algorithm parameters identification method based on backstepping theory is proposed. First disassemble the passive force control system into input subsystem and output subsystem based on backstepping theory. Then identify parameter values of each subsystem using genetic algorithm method. And find the best mathematical model to approximate...
How to eliminate the extra torque is a key problem of electro-hydraulic load system. Aimed at the characteristic of electro-hydraulic load system extra torque, different from conventional compensation methods, a rudder pressure feedforward compensation method is proposed. The mechanics of extra torque is analyzed by building the integrated model of electro-hydraulic load system. Then the rudder pressure...
The design of a compound control is presented for the servo system of hydraulic flight motion simulator, which suffers from highly nonlinear dynamics, large parameter time-variation and severe load coupling among channels. The compound control is composed of a robust feedback controller and a feedforward compensator. The design aim is to achieve high tracking performance even in the presence of considerable...
Using upper and lower bounds of the parameters a genetic algorithm parameters identification method is proposed. First the mathematical model structure of passive force control system is built, then searching the best parameter values between the upper and lower bounds of the parameters using genetic algorithm method with the goal that under the inputs of system the output approximates the output...
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