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Nonlinear coupling disturbance is an important factor to the precision of three-axis swing turntable. The paper studied platform model and anti-disturbance compensation control algorithm based on robust control idea. A three-axis turntable mathematical model is proposed using theory of DC motor and coupling torque equation. The robust controller is designed according to the adaptive robust compensation...
This paper presents a feedback linearization control scheme with sliding mode controller (SMC) for enhancing performance of the induction motor drive. The feedback decoupling controller is designed in a stationary (α-β) reference frame with rotor flux and stator current components as state variables. Since the induction motor drive system is sensitive to parameter variation and load disturbances,...
A PID control is developed for robust control of EGR (Exhaust Gas Recirculation) system in a gasoline engine. First a GT-power model of the gasoline engine with EGR system was built and verified. Then a PID controller was built using Simulink/Matlab and coupled with the GT-power engine model. A suitable tuning strategy for the PID controllers is also developed. Its response characteristics and performance...
This paper presents a design of fuzzy logic control for 2DOF laboratory helicopter model (Humusoft CE 150) which represents a nonlinear and highly cross-coupled system. The controller is composed of two fuzzy logic controllers for azimuth and elevation controls. The main objective of the paper is to obtain robust and stable controls for wide range of azimuth and elevation angles changing during the...
Generally, because of the temperature rise, the ageing, the saturation, etc. the resistance value and inductance value of the machine windings and the magnetic flux will be changed. The control performance of the permanent magnetic synchronous motors (PMSM) can be influenced by the plant parameter variation and external disturbance. This paper presents a robust H∞ control for PMSM drivers. Firstly,...
Proportional-Integral-Derivative (PID) control has been most commonly used to operate mechanical systems. In PID control, however, there are limits to the accuracy of the resulting movement because of the influence of gravity, friction, and interaction of joints. In contrast, digital acceleration control (DAC) is robust against these modeling errors by nonlinear terms. DAC requires information of...
The main objective of this research work is analysis and design controller for torque control of two-mass resonant system. The integral of time multiplied by absolute error (ITAE) is applied to assign the closed-loop poles of the system characteristic equation. The simulation results show that the transfer of torque has a better performance.
This paper introduces a direct power control (DPC) method with narrowband disturbance rejection capability for the grid-connected doubly fed induction generator (DFIG). The method is suited for variable speed operation of DFIG, especially in wind energy conversion systems connected to weak networks where voltage unbalance is common. The control framework is based on the linear quadratic regulator...
The purpose of this paper is to analyse and implement PI control for the permanent magnet DC motor. The control algorithm is realised using Siemens S7-200 programmable logic controller (PLC). The complex motor system is composed of DC motor, driver and tachogenerator. The main objective is to achieve a satisfactory time response of the system output under disturbances like death zone, nonlinearity,...
A nonlinear speed controller for permanent magnet synchronous motor (PMSM) was designed to achieve speed tracing control and robust adaptive control. The proposed strategy was composed of nominal model method, backstepping control, sliding mode approach and RBF network approach. The controller included two parts: the model controller and the robust controller. The former was designed to ensure a desired...
Ultrasonic piezoelectric motor technology is an important system component in integrated mechatronics devices working on extreme operating conditions. Due to these constraints, robustness and performance of the control interfaces should be taken into account in the motor design. In this paper, we propose an architecture for a fault tolerant control using Youla parameterization for an ultrasonic piezoelectric...
There are many uncertainty factors when the electric vehicle (EV) drives in the complicated variable circumstance, it make the control effect of some control modes non-ideal. To ensure the robustness of the closed-loop system under the presence of uncertainties, such as parameter perturbation and unknown model dynamics, and to minimize the effect of disturbances, the mu synthesis robust control is...
This paper presents a sliding mode control (SMC) design based on radial basis function neural network (RBFNN) to robust stabilization and disturbance rejection of the synchronous reluctance motor (SynRM) drive system. This method utilizes Lyapunov function and the steep descent rule to guarantee the convergence of the SynRM system asymptotically. Finally, we employ the experiments to validate the...
The well-known direct torque control (DTC) is a very simple control method for inverter-fed AC drives, which characterized by fast dynamic response, structural simplicity, and low sensitivity to parameter changes. Attempts to combine DTC with SVM have led to new ways. This paper presents a new robust DTC-SVM for high performance induction machine drives. Simulation studies have been carried out for...
Parameter variation and load disturbance will have great influence on the performance of missile electromechanical actuator system and further on the performance of the entire missile system during the missile flight process. To solve this problem, a variable structure control system for missile electromechanical actuator system was proposed in this paper. To verify the proposed control scheme, simulation...
The paper deals with the problem of robust speed control of electrical servodrives. A robust controller is developed using a nonlinear IP controller. The controller nonlinear characteristic is obtained due to fuzzy logic technique application. An original method of controller settings adjustment is presented. The use of this adjustment procedure ensures robust speed control against the variations...
This paper deals with the problem of robust speed control of electrical servodrives. A robust controller is developed using a nonlinear PI controller. The controller nonlinear characteristics is obtained due to fuzzy logic technique application. An original method of controller settings adjustment is presented. The use of this adjustment procedure ensures robust speed control against the variations...
This paper presents a robust control design for a variable-speed adjustable-pitch wind turbine system. An adaptive decoupling controller is designed to drive the turbine speed to extract invariable power from the wind and to allow pitch adjustment to power regulation. An adaptive decoupling controller is designed to drive the turbine speed to extract maximum power from the wind and to allow pith adjustment...
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