Algorithms for Estimation of the Force Loading Channel Gain of the Electrohydraulic Strength Test Bench

The problem of estimation of the force loading the channel gain of the electrohydraulic strength test bench is considered, in particular, on the basis of frequency response analysis, the gradient method, the least mean squares the method with sliding window, the recursive least squares method with forgetting factor and based on 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, there were given recommendations for building an adaptive control system with the force loading channel coefficient identification loop on the aircraft structures strength test stand. The 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.