A study of sampled-data integrator controller and its application in speed control of DC motors

Sampled-data control methods are well known as excellent tool for digital control systems, because that systematically treats the inter-sampling behavior in the controller design process. In practical applications, integrator controllers are very useful for servo-control and tracking control purpose. But unfortunately, research about the sampled-data integrator controller is few and far. In the paper, we study a designing method of sampled-data integrator controller. That may provide a simple way for practical engineer to use sampled-data control methods in applications when an integrator is needed in controllers. In addition, in order to show the validity of sampled-data integrator controllers, we applied the proposed method to speed control of DC motors, and show the method is very useful under the condition when load torque suddenly changes. A simulation model is constructed using Matlab/Simulation. Some interesting results have been obtained compared with the conventional digital LQG control method.