Nonlinear Interference Suppression Methods for Aircraft Rudder Electric Loading System
The aircraft rudder electric loading system has the features of complexity and nonlinear electromechanical control which may produce nonlinear interference such as extra torque,friction and mechanical gap during operation.Aimed at the above problems,this paper presents the hardware structure and working principle of the system,and builds the mathematical model of the system.On this basis,it analyzes the generation mechanism and working characteristics of nonlinear interference,summarizes and classifies from the aspects of the structure and control according to the nonlinear interference suppression methods for loading system,and the per-formance is compared and the applicability is analyzed.For the extra torque,a model control scheme is proposed and compensated.Experimental results show that the command torque can be tracked accurately,the error rate is less than 1.93％,and the excess torque elimination rate is up to 95.86％.The proposed scheme improves the effectiveness of the system,which can improve the sup-pression ability of extra torque and increase the tracking accuracy of the system.
electric loading systemnonlinear interferenceextra torquemodel predictive controlsuppressionaircraft rudder
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