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A Fuzzy-PID Controller for the compensation of the Direct-axis current component in the flux-weakening control system of the Permanent Magnet Synchronous Motor (PMSM) is proposed in this paper. The output torque of PMSM falls down when it operates in the high-speed as the reason of its parameters variation. In order to minimize the influences from the armature reaction, the quadrature-axis current...
The neuron net has ability to self-learning and adaptation, so its application into control does not depends on mathematic model of control object, and the neuron net controller can overcome the defect of less robustness of the conventional PI controller while changing of motor parameters. It is proposed to apply the neuron net control method into control system of the permanent magnet linear synchronous...
Conceptual design procedure of Unmanned Aerial Vehicle (UAV) flight control system is discussed in this paper. Detailed discussion of important aspects of UAV relating to its role, mission, capabilities and their implications on the flight control system are discussed. This leads to the basic requirements for the flight control and then translates to the type of controller to be used on board the...
A class of stochastic nonlinear systems with unknown bounded parameters and zero dynamics are considered in this paper. By a series of coordinate changes, the original system is re-parameterized, which is suit for using the reduced-order observer and 1-dimension adaptive law to reduce the dynamic order of closed-loop system. In adaptive backstepping design, the quadratic and the quartic Lyapunov functions...
This article provides a whole design project of ATC simulating and teaching system, and presents the framework, the function and the module of ATC simulating software. Finally we will give you a solution of system. Shanghai Metro Line 3 is the prototype of this simulating teaching system, which is the base of multimedia and network teaching to achieve the platform of ATC teaching. The teaching and...
In the permanent magnetic synchronous motor (PMSM) single rotator compressor system, the position coder is not used because of the limitation of working environment. Consequently, the load torque vibration of the compressor during each mechanical period is serious due to the restriction of location estimation accuracy, also causing big velocity fluctuation, high noise and low efficiency when the system...
In this paper, we analyze the stability of a class of interconnected systems with subsystem unmodeled dynamics and dynamic interactions employing decentralized adaptive controllers designed in [Wen, C., et al.] in the presence of actuator failures. It will be shown that the global stability of rest closed-loop system can still be achieved and the outputs can be regulated to zeros when some subsystems...
Active power filter has been proved to be a useful approach to eliminate current harmonics caused by nonlinear loads. This paper proposes a fuzzy controller with self-adjustable factor to control DC-link voltage of active power filter. The distinctive advantage of the fuzzy controller is that its fuzzy control rules can be modified according to the real system states automatically and instantaneously,...
Fuzzy control of a class of discrete-time fuzzy large-scale systems with time-delay is studied in this paper. First, a state feedback decentralized fuzzy control scheme is developed and the stability of the fuzzy large-scale systems is guaranteed. If the states are not all available, a decentralized fuzzy state observer is designed to estimate the states of the system. Consequently, an observer-based...
This paper presents a digital plug-in frequency domain based repetitive control scheme for tracking output voltage of a single-phase DC-AC inverter used in uninterruptible power supply. The proposed controller consists of a deadbeat controller and an online updated repetitive controller based on Fourier series approximation. The learning algorithm in the repetitive control is designed in frequency...
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