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This paper proposes a novel approach for AC servo system control of electrical injection molding machine. Based on the permanent-magnet synchronous motor (PMSM) vector control, position servo system is achieved using repetitive control (RC), and then the controller is designed in order to tracking the periodic reference. Not only the principle and(More)
This paper considers the problem of constructing a reliable tracking controller such that the output of resulting of closed-loop systems asymptotically tracking reference output. The uncertain linear time-delay system under consideration contains a more practical and general faults model of actuator. The main results are a sufficient condition for the(More)
On the basis of artificial neural network theory, this paper has put forward a new kind of speed observer. The observer is good in robustness of motor parameter changes, high in the observation precision. The speed identification convergence is fast, especially keeping higher precision in low speed. At the same time, the paper puts forward a new method of(More)
In this paper, a full-order sliding mode control based on extended state observer (FSMC+ ESO) is proposed for high-order nonlinear system with unknown system states and uncertainties. The extended state observer (ESO) is employed to estimate both the unknown system states and uncertainties so that the restriction that the system states should be completely(More)
In the Permanent Magnet Synchronous Motor(PMSM) field-oriented control system, the information of rotor position and speed are necessary in order to achieve high performance. This method is based on sliding mode observer theory using Lyapunov stability criteria. The proposed estimation method is implemented using a stator flux/current and a modified back(More)
Process knowledge discovery is a significant research field in enterprise management. Based on process knowledge complexity and specialty, a process knowledge discovery model is presented in this paper according to multi-agent technology for full life-orientation of the product which is a solid foundation for an enterprise seeking optimal process(More)