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Research on observer algorithm of mover displacement for linear oscillatory actuator based on online stator resistance identification

To eliminate the observation error caused by the stator resistance thermal effect, a mover displacement observation algorithm based online stator resistance identification is proposed. With the adaptive law design of the stator resistance online identification based on Lyapunov algorithm, the resistance parameter can be adjusted according to the stator resistance online identification model. The effectiveness of the algorithm was verified via simulation. The simulation results showed that the algorithm can adaptively track the stator resistance parameter to realize the accurate observation of the mover displacement. And the algorithm is small in computation, fast in convergence, robust and easy to implement.