Applied Research Of PID Self-Tuning Method In Microcomputer-Controlled Electric Locomotive

Most of SS3B current electric locomotive drive control system are based on the double closed-loop control structure which have one classic PID speed loop and one classic PID current loop, both classic PID regulator are based on "simulated Operational Amplifier" as the main components of the analog PID regulator. Analog PID regulator is easier to achieve, better stability, but in practice it rely too much on the model parameters of the control object, and because of electric locomotives have a large time delay,nonlinear,characteristic of strong interference in running course, the classic PID control system is difficult to obtain good dynamic performance.Because of the application of the classic PID control is deficiencies in the transmission control of SS3B electric locomotive, this article carry out a research of design which uses single neuron PID parameter self-tuning algorithm, and achieve this algorithm in development of microcomputer control cabinet of SS3B electric locomotive. Trial has proved that the SS3B electric locomotive used the single neuron PID parameter self-tuning algorithm has a good dynamic performance. In addition, the single neuron PID parameter self-tuning control algorithm in the microcomputer control cabinet is easy to implement, and its occupation of computer hardware and software resources is less than other intelligent control method in actual operation of the process, so it's easy maintenance for computer control cabinet.First of all, this article make a simulation of tuning parameters of single neuron PID parameter self-tuning algorithm used in the transmission control system of SS3B electric locomotive. Second, with analyze the features of SS3B electric locomotive in depth, and compare the field test data with the model output data, a precise simulation model of the drive control system of SS3B electric locomotive is established in the Matlab/Simulink simulation environment. And then use this model to significantly reduce the parameter self-tuning time of single neuron PID parameter self-tuning algorithm, making single neuron PID parameter self-tuning algorithm satisfy the demand of control of transmission control of SS3B electric locomotive.At last, the article make a research and design of the trial which the single neuron PID parameter self-tuning algorithm has been applied to SS3B electric locomotive microcomputer control cabinet. In order to ensure safety of the train and test equipment in the course of the experiment and under inflexible test time, a variety of trial programs have been designed. Field trial proved that the application of single neuron PID parameter self-tuning algorithm in SS3B electric locomotive control system allows the design requirements of performance of microcomputer control cabinet.