|Autors: Mitov, A. S., Slavov, T. N., Kralev, J. K., Angelov, I. I.|
Title: Robust Stability and Performance Investigation of Electrohydraulic Steering Control System
Keywords: lectrohydraulic system; H∞ ; LQG; Robust performance; Robust stability.
Abstract: The article introduces a robust stability and robust performance investigation of two embedded systems for control of electrohydraulic power steering in mobile machinery. They are based on advanced control techniques - linear-quadratic Gaussian (LQG) controller and H-infinity controller. The synthesis of the two controllers is performed via experimentally estimated SIMO state space model. The 30% input multiplicative uncertainty is introduced in estimated model. In this manner, a dead-band of proportional spool valve position is taken into account. This dead-band is constructively implemented to provide safety requirements of electrohydraulic steering. The robust stability and robust performance analysis are done by determining a structured singular value (μ) of the both closed-loop control systems, which are represented in M-Δ structure. The workability of the both systems are verified through simulation and real world experiments on laboratory test rig.
Copyright Springer Nature
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