The fuzzy control of an electrohydraulic fatigue testing system
by Y.T. Wang, C.C. Chang
International Journal of Materials and Product Technology (IJMPT), Vol. 13, No. 3/4/5/6, 1998

Abstract: Electrohydraulic control systems have been widely used for material testing. But, because of the variety of parameter and high-order parameter identification, the design of a suitable controller is not easy. In this paper, the fuzzy logic controller and linguistic approach self-organising fuzzy controller are implemented for fatigue position and force testings. Experiments have been carried out at between 0.1-10 Hz. The results indicate that the fuzzy logic controller with a fixed fuzzy rule is valid only for a narrow frequency range. The linguistic approach self-organising fuzzy controller has a learning mechanism to adjust the fuzzy rule. Thus it can be implemented for a wider frequency range, and the peak-peak magnitude errors of both position and force testings are within 3% for 0.1-10 Hz sinusoidal commands.

Online publication date: Mon, 01-Nov-2010

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