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This paper presents an adaptive nonlinear position controller with velocity constraint, capable of combining the input-output linearization technique and Lyapunov stability theory. Based on the Lyapunov stability theory, the adaptation law of the proposed controller is derived along with the verification of the overall system's stability. Computer simulation results demonstrate that the proposed controller...
In this paper we propose a new control scheme for the doubly-fed induction machine (DFIM) that offers significant advantages, and is considerably simpler, than the classical vector control method. In contrast with the latter, where the DFIM is represented in a stator flux-oriented frame, we propose here a model with orientation of the stator voltage. This allows for an easy decomposition of the active...
The paper presents a sensorless vector control method for a permanent magnet synchronous motor when the output voltage of the PWM inverter is filtered by an LC filter. The dynamics of the LC filter are taken into account in the design of the controller and adaptive full-order observer. The use of the output filter does not require additional current or voltage measurements. The speed adaptation is...
In this paper a new model of one-cycle control is proposed; it is valid, both in CCM and DCM, for frequencies up to half the switching frequency. The new model is obtained by using the sampled-data modeling combined with the usual small-signal linearization of the average model of the converter power stage. All of the main dynamic characteristics of one-cycle control are correctly predicted by the...
This paper introduces a new approach to analyse matrix converter (MC) stability, aimed to aid stable design of practical MC systems that include input filter and control, accounting for digitisation, calculation delay and input phase locked loop (PLL) effects. The linearisation technique as a method to obtain stability limits is first validated here for a typical MC system with digital implementation...
In this paper, model reference adaptive control (MRAC) is proposed for a single-phase shunt active power filter (APF) to improve line power factor and to reduce line current harmonics. The proposed active power filter controller forces the supply current to be sinusoidal with low current harmonics and in phase with the line voltage. The advantages of using MRAC over conventional proportional-integral...
This paper proposes a dynamic study of the DC/DC series resonant converter operating with asymmetrical clamped-mode modulation technique. The study includes the synthesis of a suitable averaged large-signal dynamic model and the design of a nonlinear feedback controller based in the input-output linearization approach. The proposed controller provides some outstanding features as: ZVS condition for...
This paper presents a feedback linearization approach for high performance induction motor control. Some oscillograms illustrating the properties of the PWM inverter-fed induction motor with control via feedback linearization are presented. The sliding mode observer is used to estimate the rotor flux and the angular speed of the motor
This paper presents a new control strategy for a three phase shunt active power filter, which consists of applying an adaptive nonlinear control. This technique consists of applying an adaptive nonlinear control to the uncertain nonlinear model of shunt active power filter obtained in (dq) frame by using the power balance between the input and output sides. The designed adaptive nonlinear controller...
This paper introduces a high-speed motion control technique for inverted pendulums using zero dynamics. Inverted pendulums are self-regulated systems that simulate the motion of a child swinging up an umbrella or stick. The controller design for various pendulums has been widely challenged since the 1970s. Recently, machines using this principle are developed for human riding. Many bipedal robots...
This paper introduces a dynamic study for the DC/DC CLL-T resonant converter operating with self-sustained oscillating modulation. The study includes the development of a suitable averaged large-signal dynamic model and the design of a nonlinear feedback controller that uses the sliding motion principles and the input-output linearization approach. The combination of the proposed controller and modulation...
In this article the control problem of a non-linear micro-capacitor (μ C) is considered. Utilization of FEM can approximate the μ - A dynamics nonlinear-PDE to a finite nonlinear-ODE. The nonlinearity stems from the plate's rigid-body motion, while all flexibility effects are considered as additive linear-terms. The control methodology we employ is a combination of two ideas. First we use standard...
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