Experimental Research Methods in Reproducing Accelerated Gear Degradation of the Aircraft Control Surface Electromechanical Actuator

Abstract

Control surface electromechanical actuator appears to be a critically important system, its operability is also significant in ensuring safe flight of an aircraft. It is possible with the electromechanical actuator to use the early diagnostics tools that identify hazardous technical condition before a failure. Their development and study require methods for experimental evaluation of characteristics during development of the electromechanical actuator degradations. The paper provides rationale in selecting the backlash and friction parameters for classifying technical condition of the electromechanical actuator reducer and the methods for determining them in reproducing static modes of the control signal processing. Using the example of an electromechanical actuator with the roller-screw reducer, relationship between alteration in the backlash parameter and the reducer degradation was experimentally confirmed, as well as the friction parameter dependence on the active stator current signal with the varying external exposure temperature. A method for conducting the accelerated resource tests of the electromechanical actuator during the periodic control signals processing was developed. Test modes and parameters were determined for studying the degradation development processes. Based on the technical requirements data for a typical flight cyclogram and the required service life of the modern trunk-route aircraft control surface actuators, duration of the accelerated service life tests was assessed. Methods for the degradation artificial introduction into an electromechanical actuator gearbox were considered

The study was partially supported by a Grant from the Russian Science Foundation (project no. 23-19-00464)

Please cite this article in English as:

Skryabin A.V., Steblinkin A.I. Experimental research methods in reproducing accelerated gear degradation of the aircraft control surface electromechanical actuator. Herald of the Bauman Moscow State Technical University, Series Mechanical Engineering, 2024, no. 3 (150), pp. 101--117 (in Russ.). EDN: IMBAGZ

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