Robust control of hydraulic servos

S.P. Hampson, P.K. Chawdhry, C.R. Burrows

Research output: Contribution to conferencePaperpeer-review


Developing controllers for hydraulic servos is difficult due to the inherent uncertainty and nonlinear characteristics of the system. Systems are classed as uncertain when they are subject to unknown parameter variations or disturbances, or when there is incomplete knowledge of the system model, all of which are common in hydraulic servo systems. However, unlike conventional control techniques, the use of modern control methods means that system uncertainty can be considered at the controller design stage, and consequently robust controllers can be developed. In this paper the robust control of hydraulic servo systems is considered, and sources of uncertainty typical in hydraulic drives are discussed. The effect of ignoring these uncertainties is demonstrated by simulation experiments of a hydraulic servo, comparing conventional control techniques to the modern approach of H optimal control. The implementation of modern controllers is also discussed.
Original languageEnglish
Publication statusPublished - 1996
EventInternational Off-Highway and Powerplant Congress and Exposition - Indianapolis, IN , USA United States
Duration: 26 Aug 199628 Aug 1996


ConferenceInternational Off-Highway and Powerplant Congress and Exposition
Country/TerritoryUSA United States
CityIndianapolis, IN


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