A novel digital governor for diesel engine based on nonlinear PID strategy

In order to enhance the reliability of small power generating units, a strategy of the self-tuning control of nonlinear PID for the digital governor is presented. By analyzing the control system of the diesel engine, the basic control parameters are confirmed. Compared the digital PID with the traditional PID, a novel self-tuning control strategy is proposed, which uses the nonlinear PID algorithm. The principle of the nonlinear PID parameters is proposed, the tables of the detailed data are presented. The hardware platform of this structure is composed of host-computer and servo-controller. Using this system, the response speed could be enhanced. For the better performance of this system, the Smith Prediction is used in the control strategy at the proportional process. At the end of this paper, the experiment results verified that the control strategy is reliable, the nonlinear PID parameters are rational, and the system has better dynamic response.