Nonlinear Modeling and Analysis of a Dual-stage Direct Drive Actuator

doi:10.3901/JME.2018.20.312

Abstract

Abstract: As a high-performance aircraft actuator, direct drive actuator has many advantages such as simple structure, light weight, small volume, low cost, little static leakage and high reliability. A new type dual-stage direct drive actuator is introduced, of which the principle and characteristics are illustrated. The present researches on direct drive actuator are mostly concentrated on linear methods, which is difficult to satisfy the increasingly high performance requirements because of the hydraulic inherent nonlinear properties and uncertainties. Because hysteresis will cause vibration and mistake to the nonlinear system, with this consideration, the nonlinear motor model with hysteresis is built. The redundant servo control system and other nonlinear part including input constrain, dead-zone and filter are analyzed. The nonlinear state equation model of the direct drive actuator is built and the simulation results are obtained via MATLAB/SIMULINK. By comparing the simulation results and experiment data, the proposed nonlinear modeling strategy is proved to be correct.

Key words: direct drive actuator, hydraulic system, nonlinear modeling

CLC Number:

TP273

LUO Chengyang, YAO Jianyong, YU Yongping, LIU Hui, XU Qiang. Nonlinear Modeling and Analysis of a Dual-stage Direct Drive Actuator[J]. Journal of Mechanical Engineering, 2018, 54(20): 312-319.

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