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An adaptive control algorithm for the elimination of torque and velocity ripples in the alternating current (AC) permanent magnet (PM) motor control systems is presented in this paper. A model of AC PM motor system includes n sinusoidal disturbances is first developed. The internal model principle (IMP) is then applied to design a controller to eliminate the torque and velocity ripples without estimating...
This paper presents a control method using an adjusting output-limiter for stable haptic rendering in a virtual environment. In a simulation of force-reflecting interaction with deformable objects in a virtual environment, a quick computation of the accurate impedance of deformable objects is rare. This is particularly true when physics-based models, such as tensor-mass models or mass-spring models,...
This paper presents a simple controller design methodology in the frequency domain for disturbance rejection specifications. It captures the main characteristics at low and high frequencies of a Disturbance Observer Based Control, and solves some of their principal drawbacks in terms of stability and performance specifications, quantifying the inherent limitations for disturbance rejection by means...
In this paper we design two controllers: a sliding mode controller and a new designed adaptive controller for an under actuated process with important dry friction. The two controllers are compared. Simulations and experiments are performed to evaluate the efficiency of the designed controllers.
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