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In this paper, a self-tuning proportional plus integral (PI) controller is proposed for current control in a permanent magnet synchronous motor system (PMSM). Based on the Lyapunov stability theorem, the self-tuning laws are derived and the coefficients of the PI controllers can be suitably adjusted to deal with uncertainties and external disturbances. Thus, the on-line tuned coefficients can force...
In this paper, a simple and novel sliding mode controller (SMC) with uncertainties estimation is proposed for robust current control in a permanent magnet synchronous motor (PMSM). Based on the Lyapunov stability theorem, estimation laws are derived to estimate uncertainties of a PMSM caused by parametric variations or unmodeled dynamics and the system robustness, as well as stability is guaranteed...
A speed synchronization scheme for multi induction motors is developed, by incorporating total sliding mode control into adjacent cross-coupling control architecture. The presented control scheme comprises two parts: tracking error controller and synchronization error controller. The proposed control strategy is to stabilize speed tracking of each induction motor while synchronizing its speed with...
Fuzzy Lyapunov synthesis is extended to the design of type-2 fuzzy logic system controllers for the output regulation problem for a servomechanism with nonlinear backlash. The problem in question is to design a feedback controller so as to obtain the closed-loop system in which all trajectories are bounded and the load of the driver is regulated to a desired position while also attenuating the influence...
This paper examines an adaptive control scheme for tubular linear motors with micro-metric positioning tolerances. Uncertainties such as friction and other electromagnetic phenomena are approximated with a radial basis function network, which is trained online using a learning law based on Lyapunov design. Differently from related literature, the approximator is trained using a composite adaptation...
The performances of brushless DC motors (BLDCM) will directly restrict the performances of electro-mechanical actuator (EMA). To improve the performances of the BLDCM, a dynamic mathematical model with taking into the problem of parameter variation and nonlinear dynamic friction compensation has been established, a recurrent neural network (RNN) based adaptive back stepping control (RNABC) for BLDCM...
In this paper an variable structure speed controller for induction motor(IM) is developed, which combines the merits of sliding mode variable structure theory, direct field-oriented control (DFOC) and adaptive algorithm. Firstly, a sliding mode controller is designed and the adaptive algorithm is adopted to adjust the sliding gain in order to restrain chattering. And then a sliding mode flux observer...
This paper presents a fuzzy sliding mode speed control design procedure for robust stabilization and disturbance rejection of the synchronous reluctance motor (SynRM) drive system. In general, the conventional sliding mode control design is assumed that the upper boundary of parameter variations and external disturbances is known and the sign function is used. Therefore, it causes high frequency chattering...
An robust control scheme on the model of surface permanent magnet synchronous motor, composing a sliding-mode controller and a sliding-mode observer, was presented in this paper. To eliminate the effects of parameters variation and uncertainties, the controller was constructed instead of conventional PI controller as well as the self-adaptive rule was deduced using Lyapunov stability theory. The required...
In this paper, the design of a backstepping adaptive type-2 fuzzy controller for induction machine is addressed. The backstepping has been adopted to exploit the field oriented control scheme and to use only one control channel. Thus, the true and virtual control signals have been synthesised using two adaptive type-2 fuzzy systems to overcome the constraint on the knowledge of the machine parameters...
The design of a speed sensorless PWM robust control scheme for an induction motor drive in order to control the rotor speed is proposed. The proposed design is divided in two parts. In the first one it is designed a speed estimator to estimate the rotor speed. In the second one it is developed the proposed robust control. This robust control comprises two parts, the so called inverse dynamic technique...
This paper presents the a adaptive sliding mode speed control design procedure for robust stabilization and disturbance rejection of the current sensorless synchronous reluctance motor (SynRM) drive system. In this paper, we proposed a novel adaptive sliding mode control to avoid the conventional sliding mode control, which causes high frequency chattering and high gain phenomenon drawbacks due to...
This paper presents a robust nonlinear controller for speed and flux control of primary type linear induction motor (LIM) drive. The proposed controller is designed based on combination of input-output feedback linearization and sliding-mode (SM) control taking into account the LIM end effects. The stability of proposed composite controller is proved by Lyapunov theory. The effectiveness and validity...
This paper presents the direct torque control (DTC) of an interior permanent magnet synchronous motor (IPMSM) based on sliding mode technique. An adaptive sliding mode controller is designed for controlling the electromagnetic torque. Consequently, the demerits of classical DTC (large torque and current ripples due to sector changes, low speed problems, and sensitvity to uncertainties) could be avoided...
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