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- W2617007078 abstract "Due to the properties such as small size-to-power ratio, large force output capability and fast response, the hydraulic position servo system is widely used in industrial automation fields. High-precision tracking control of hydraulic system is required for some application fields, for example, machine tools and robotic applications. However, the difficulty to obtain model parameters is one of the main obstacles to obtain high-precision tracking control using the model-dependent method. Moreover, the state sensors, for example, bulky pressure sensor, make the system structure complicated and decrease the reliability. An adaptive output feedback control scheme is proposed for the hydraulic position servo system with uncertain parameters and unmeasurable states. The proposed controller and parameter adaptation laws guarantee that the tracking error is uniformly bounded. The experiment results show that the proposed method makes the system with uncertain parameters track the reference with high precision only using the system output information. Compared with the traditional proportional–integral–derivative control method with optimal parameters obtained using genetic algorithm, sliding mode control based on exponential reaching law, adaptive control method and adaptive backstepping sliding mode control, this method has higher tracking accuracy for three reference signals. For sinusoidal reference signal, the average root mean square error is reduced to approximately 0.23 mm. For S-curve reference signal, the average root mean square error is reduced to approximately 0.16 mm. For multi-frequency sinusoidal reference signal, the average root mean square error is reduced to approximately 0.05 mm. The proposed controller also has better anti-interference ability with respect to load change." @default.
- W2617007078 created "2017-06-05" @default.
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- W2617007078 date "2017-05-31" @default.
- W2617007078 modified "2023-10-16" @default.
- W2617007078 title "Adaptive control of hydraulic position servo system using output feedback" @default.
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- W2617007078 doi "https://doi.org/10.1177/0959651817708487" @default.
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