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In view of the shortcomings on synchro-motion of slide carriage in hydraulic broaching machine driven by single cylinder, an electro-hydraulic servo system with dual cylinder is designed and its nonlinear model was presented. Then the theory of taylor expansion to second order of output vector, optimal control and nonlinear disturbance observer designing are introduced, and a nonlinear PID synchro...
Based on the conception of relative-degree of differential geometry theory on nonlinear system, nonlinear disturbance decoupling control on travelling crane electro-hydraulic servo system with dual cylinder was studied. Through define relative-degree of disturbance vectors on the nonlinear system, the sufficient condition of system disturbance decoupling was provided. Then a differential geometry...
According to synchronization motion control with four cylinders in steel pipe packing process, nonlinear model of the system was presented. Then a nonlinear cascade controller was put forward. The provided approach integrated synchronization spatial alternation, quantitative feedback theory(QFT) and control allocation theory(CAT) to coordinate the redundant actuator control in external loop; moreover,...
In this paper, in order to deal with the synchro motion of four cylinders in pattern drawing machine, an electro-hydraulic synchro servo system(EHSS) with four cylinders is developed and its nonlinear dynamic model is presented. Based on the theory of taylor expansion, optimal control and nonlinear disturbamce observer designing, a nonlinear PID synchro controller for EHSS with four cylinders is proposed...
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