Design of deadbeat control system using multirate controller and its application to speed control of induction motor

Abstract

This paper proposes a design method of an optimal deadbeat control system that takes into account the response between the sampling instant. The sequence of the deadbeat control signal that minimizes the quadratic performance index for the manipulated variable and deviation can be obtained easily from the matrix computation using the step response of the system. Then, the series compensation controller and series integral + local feedback compensation controller with fictitious sampler can be designed by using sequence of the control signal. The results of a computer simulation by the present method and application of this method to a speed control system of the inverter‐fed induction motor have been studied in order to explore the control effect. The method seems to be useful for practical application. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 118 (1): 83–92, 1997

Nonlinear Control of Induction Motor Based on Network Control System

“…In this case, the controller gain can be obtained. Without considering the disturbance, the initial value of the state vector is: X(0) � [5,10,15,20], and the closed-loop state response is: X(0) � [5,10,15,20]. As shown in Table 2 and Figure 2, the system with parameter perturbation can be asymptotically stable under the action of the controller.…”

“…e main feature of the beamline structure is that the signal transmission between the motor, controller, and sensor is directly transmitted through the communication network [20]. e network undertakes the closed-loop connection of the whole servo system, and its structural feature is that each motor is equipped with a network interface unit, which undertakes the function of information modulation and demodulation.…”

“…Disturbance. As shown in Figure 3 and Table 3, the initial value of state vector is x (0) � [5,10,15,20] for the random number sequence with w(t) variance of 0.05 and the average value of 0 when considering disturbance. It can be seen that the system with parameter perturbation can be asymptotically stable under the action of the controller, and can still achieve asymptotic stability in the case of external disturbance, which verifies the effectiveness and feasibility of the method.…”

“…In this case, the controller gain can be obtained. Without considering the disturbance, the initial value of the state vector is: X(0) � [5 10 15 20], and the closed-loop state response is: X(0) � [5,10,15,20]. As shown in Table 4 and Figure 4, when D2 value is 1.1355, the closed-loop response state of robust controller achieves asymptotic stability faster than that when D2 value is 0.1355.…”