ALGORITHMS FOR ESTIMATION OF THE FORCE LOADING CHANNEL GAIN OF THE ELECTROHYDRAULIC STRENGTH TEST BENCH
M. V. Trubin1, V. D. Yurkevich1,2
1Novosibirsk State Technical University, Novosibirsk, Russia
2Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: strength tests, electric hydraulic drive, regulation, identification, gradient method, least squares method, harmonic analysis
Abstract
The problem of estimation of the force loading channel gain of the electrohydraulic strength test bench is considered, in particular, on the basis of the frequency response analysis, the gradient method, the least squares method with sliding window, and the recursive least squares method with forgetting factor and based on the harmonic analysis. The calculation relations of the algorithms for obtaining an estimate of the force loading channel gain are given, the results of implementation of these methods on the experimental bench are presented, and a comparison of the estimates obtained by different methods is performed. As a result of the conducted research, recommendations are given for building an adaptive control system with the force loading channel coefficient identification loop on the aircraft structures strength test stand. The obtained results make it possible to automate the process of regulators’ adjustment for electric hydraulic actuators of the stand and to speed up the process of strength and fatigue strength tests of aircraft structures.
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