A Comparative Analysis to Traditional PID and Fuzzy Adaptive PI-Variable Damping Controlling System of MRST Stabilized Platform

Based on analysis to the performance requirements of the modulation rotary steerable drilling tool (MRST) stabilized platform controlling system, traditional PID and fuzzy adaptive PI-variable damping control schemes are studied contradistinctively to better solve the control problem. The simulation results show that the traditional PID control method only caters to one working condition of the controlling system, but the other, using fuzzy control algorithm, can adjust controllerpsilas parameters onlinely in terms of systempsilas responses to eliminate the interferences of diverse drilling conditions, adapts to the nonlinearity and time-varying uncertainty, has perfect control effect: the adjusting time is only about 0.3s, the overshooting is less than 0.5% and the steady-state error is not more than 0.05%, exhibiting good quick-responsibility, stability, adaptability, noise immunity and robustness.