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Improving Characteristics of a Linear Electric Motor of a Servo System by Means of Adaptive Control with an Exo-Model

Vladimir Kuznetsov(1*), Nikolay Polyakhov(2), Chung Th. Phan(3)

(1) Automatic control system department, Saint Petersburg Electrotechnical University "LETI", Russian Federation
(2) Automatic control system department, Saint Petersburg Electrotechnical University "LETI", Russian Federation
(3) Automatic control system department, Saint Petersburg Electrotechnical University "LETI", Viet Nam
(*) Corresponding author


DOI: https://doi.org/10.15866/ireaco.v10i6.13080

Abstract


This article focuses on creating a simulation model of an electric motor engaging linear forces to move a servo drive hydraulic valve. The new simulation model of the electric motor gives an analytical description of nonlinear features that quite accurately match with the experimental dependences. There is a representation of the nonlinear static mechanical characteristics of the linear electric motor with an analytical thrust characteristics and the reaction of the electromagnetic force and the elastic spring force of a mechanical spring. A synthesis is given by the method of Lyapunov functions of the adaptive control algorithm with an exo-model in the form of multiplication of fast and slow subsystems for multi-speed technical servo systems with limited uncertainty. The results of the practical studies are given on the example of an adaptive control system of an electrohydraulic servo with a linear valve control motor.
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Keywords


Linear Electric Motor; Simulation Model; Adaptive Control; Exo-Model; Servo System

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References


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