Tracking Position Control of Electrohydraulic System with Minimum Number of Sensors

Lilia SIDHOM¹, Mohamed SMAOUI², Xavier BRUN²

Abstract: In general, feedback controllers require measurements of velocity and acceleration for feedback. To avoid the complexity of overall system with minimizing the sensor number implements on a test bench, a new estimation algorithm of the successive derivatives of measured signal is proposed. The differentiator design is a very difficult task because the important problem in real time differentiation signal is to combine differentiation exactness with robustness in respect of measurements errors and input noises. For this target, a higher order sliding modes differentiator with dynamic gains is proposed. The experimental validation highlights the performances of the differentiator/controller design of a high dynamic electrohydraulic servo-system. For this validation, two controllers are implemented on the test bench for position tracking objective. Moreover, two kinds of differentiators are also tested: the proposed one and some classic algorithm.

Keywords: Differentiator design, Dynamic gains, High order sliding mode, Experimental results, Electrohydraulic servo-actuator.

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CITE THIS PAPER AS:
Lilia SIDHOM, Mohamed SMAOUI, Xavier BRUN, Tracking Position Control of Electrohydraulic System with Minimum Number of Sensors, Studies in Informatics and Control, ISSN 1220-1766, vol. 25(4), pp. 479-488,  2016. https://doi.org/10.24846/v25i4y201609