Effect of Feedback Control on the Bifurcation Stability of a Nonlinear Servohydraulic System: An Experimental Investigation

Servo-hydraulic systems are commonly used for motion and force control. In this work, an experimental investigation is performed to study the effect of feedback control on the bifurcation stability of a nonlinear servo-hydraulic system. A low-order model of the experimental test stand is developed, validated and analyzed. It is shown that the use of appropriate feedback control structure can improve the bifurcation stability of a nonlinear servo-hydraulic system. Parametric space investigation is conducted to study the bifurcation stability behavior of the system and stability boundaries are developed to demonstrate the effect of linear feedback on the nonlinear systems.Copyright © 2003 by ASME