Optimization of PID Parameters for Mine Hoisting DTC System Based on Chaos Theory

Based on chaos optimization theory a novel optimization design scheme of PID speed controller parameters is proposed for the mine hoist direct torque control (DTC) system in this paper. The Logistic mapping process from sequence state to chaos state is introduced, and the strategy of chaos optimization PID controller parameters is discussed. According to the ergodicity and random characteristics of chaos dynamics, the PID controller parameters are optimized in real time by mean of both rude and precision searching procedures in order to make the mine hoist move stable in different operation conditions. The theory analysis and simulation results show that the proposed design method of PID controller optimization parameters based on chaos theory has some virtues of the fastest response time and small overshoot compared with the traditional tuning method.