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Nonlinear control for a class of hydraulic servo system 总被引：2，自引：0，他引：2
INTRODUCTION Electro hydraulic servo systems (EHSS) havebeen used in industry in a wide number of applica-tions due to their small size-to-power ratio and theability to apply very large force and torque. How-ever, the dynamics of hydraulic systems are highlynonlinear (Merritt, 1967), the system may be sub-jected to non-smooth and discontinuous nonlin-earities due to control input saturation, directionalchange of valve opening, friction, and valve overlap.Aside from the nonlinear na… 相似文献
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The dynamics of hydraulic systems are highly nonlinear and the system may be subjected to non-smooth and discontinuous nonlinearities due to directional change of valve opening,friction,etc. Aside from the nonlinear nature of hydraulic dynamics,hydraulic servo systems also have large extent of model uncertainties. To address these challenging issues,a robust state-feedback controller is designed by employing backstepping design technique such that the system output tracks a given signal arbitrarily well,and all signals in the closed-loop system remain bounded. Moreover,a relevant disturbance attenuation inequality is satisfied by the closed-loop signals. Compared with previously proposed robust controllers,this paper's robust controller based on backstepping recursive design method is easier to design,and is more suitable for implementation. 相似文献
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