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This paper explains and demonstrates a model-following controller design based on the stabilized digital inverse system. Conventional digital inverse systems are constructed behind a plant to estimate unknown disturbances. Herein, the inverse system is designed in front of the plant. The model-following controller is then constructed on the basis of this structure. However, when the relative degree...
In this paper, we propose a high speed activation and stopping control system using the bang-bang control for a dc motor. The Bang-Bang control is able to control the actuator in high speed activation and stopping. However, when there are torque disturbances in actuators, the target-position is not able to be precisely stopped. Therefore, we design the switching control system. It operates from the...
This paper describes an optimal control system with dual-sampling observer. The proposed system design is independent of the plant sampling rate and it controls the plant as high sampling rate although the plant has the low sampling rate. It can be applicable to the plant that has the low sampling rate and the proposed method can apply in various types of the plant. The proposed method has revolutionary...
This paper describes an improved internal model control based on PID control for servo system with dead time. The internal model control works for more stability of disturbance. The proposed system uses the feedback based on internal model control and PID control when the disturbance occurs. The proposed method can be applied to not only servo stable plant with dead time but also unstable plant with...
In this paper, a discrete modified Smith predictor based on optimal control design method is proposed. A plant with long dead-time is controlled by means of a predicted-state feedback technique and a modified Smith predictor composed of a plant predictor and an observer. In this method, states of a plant are obtained by an observer because the states are not measured directly in practice. The advantages...
This paper describes a two stage control system based on an optimal control scheme with a disturbance observer and a kalman filter. It is combined a speed control system and a position control system, which are designed by an optimal control, respectively. The system controls the speed before a changeover point, and it controls the position after the changeover point. The controlled plant input that...
This paper describes the design of a new simple antiwindup control based on a PI control with an initial value of the integral state variable as a design parameter. It is combined a P controller and a PI controller. Before the changeover point, it uses a P controller. It is changed from the P controller to the PI controller after the changeover point. The changeover point is simply defined by using...
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