Robust adaptive control for hydraulic servosystems

N. D. Vaughan; A. R. Plummer

Robust adaptive control for hydraulic servosystems

University of Bath

Research output: Contribution to journal › Conference article › peer-review

Abstract

The application of an indirect (self-tuning) adaptive controller to an electro-hydraulic positioning system is described. The underlying control method is pole placement, with the addition of a demand filter to allow noise effects to be reduced without degrading closed-loop performance. Recursive least squares is used to estimate the plant parameters, but the data is pre-filtered to reduce bias. A novel covariance trace limiting algorithm provides estimator reliability despite periods of insufficient excitation. Off-line system identification is employed to help controller design for the electro-hydraulic servosystem. The resulting controller performs well, and adapts rapidly to changes in load stiffness and supply pressure.

Original language	English
Journal	American Society of Mechanical Engineers (Paper)
Publication status	Published - 1 Dec 1990
Event	Proceedings of the Winter Annual Meeting - Dallas, TX, USA Duration: 25 Nov 1990 → 30 Nov 1990

ASJC Scopus subject areas

Mechanical Engineering

Cite this

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abstract = "The application of an indirect (self-tuning) adaptive controller to an electro-hydraulic positioning system is described. The underlying control method is pole placement, with the addition of a demand filter to allow noise effects to be reduced without degrading closed-loop performance. Recursive least squares is used to estimate the plant parameters, but the data is pre-filtered to reduce bias. A novel covariance trace limiting algorithm provides estimator reliability despite periods of insufficient excitation. Off-line system identification is employed to help controller design for the electro-hydraulic servosystem. The resulting controller performs well, and adapts rapidly to changes in load stiffness and supply pressure.",

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year = "1990",

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AU - Vaughan, N. D.

AU - Plummer, A. R.

PY - 1990/12/1

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N2 - The application of an indirect (self-tuning) adaptive controller to an electro-hydraulic positioning system is described. The underlying control method is pole placement, with the addition of a demand filter to allow noise effects to be reduced without degrading closed-loop performance. Recursive least squares is used to estimate the plant parameters, but the data is pre-filtered to reduce bias. A novel covariance trace limiting algorithm provides estimator reliability despite periods of insufficient excitation. Off-line system identification is employed to help controller design for the electro-hydraulic servosystem. The resulting controller performs well, and adapts rapidly to changes in load stiffness and supply pressure.

AB - The application of an indirect (self-tuning) adaptive controller to an electro-hydraulic positioning system is described. The underlying control method is pole placement, with the addition of a demand filter to allow noise effects to be reduced without degrading closed-loop performance. Recursive least squares is used to estimate the plant parameters, but the data is pre-filtered to reduce bias. A novel covariance trace limiting algorithm provides estimator reliability despite periods of insufficient excitation. Off-line system identification is employed to help controller design for the electro-hydraulic servosystem. The resulting controller performs well, and adapts rapidly to changes in load stiffness and supply pressure.

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M3 - Conference article

AN - SCOPUS:0025560567

SN - 0402-1215

JO - American Society of Mechanical Engineers (Paper)

JF - American Society of Mechanical Engineers (Paper)

T2 - Proceedings of the Winter Annual Meeting

Y2 - 25 November 1990 through 30 November 1990

ER -

Robust adaptive control for hydraulic servosystems

Abstract

ASJC Scopus subject areas

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