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http://dx.doi.org/10.7839/ksfc.2018.15.1.016

The Study of the Design of a Hydraulic Torque Load Simulator Equipped with a Direct Drive Servo Valve and a Feed forward Compensator  

Lee, Seong Rae (Department of Mechanical Engineering, Konyang University)
Publication Information
Journal of Drive and Control / v.15, no.1, 2018 , pp. 16-27 More about this Journal
Abstract
Hydraulic torque load simulator is essential to test and qualify the performance of various angle control systems. Typically a flapper-type second stage servovalve is applied to the load simulator, but here the direct drive servovalve, which is a kind of one-stage valve and affected by the large flow force, is applied. Since the torque load is applied not to the stationary shaft but to the rotating shaft of the angle control system, the controlled torque of load simulator is not accurate due to the rotating speed of the angle control system. A feedforward compensator is designed and applied to minimize the disturbance-like effect. A mathematical model is derived and linearized to analyze the stability, accuracy and responsiveness of the torque load simulator. The parameter effects of a controller, servovalve, hydraulic motor, rotating spring shaft are analyzed and summarized. The goodness of the linear analysis is verified by the digital computer simulations using both the linear and nonlinear mathematical models.
Keywords
Hydraulic Torque Load Simulator; Direct Drive Servo Valve(DDV); Flow Force; Control System; Feedforward Compensator;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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