Author(s)

Baishun Liu, Bin He, Xiangqian Luo

Academy of Naval Submarine, Qingdao, China.

In conjunction with a second order uncertain nonlinear system, this paper makes some comparisons between PID control and general-integral-proportional-derivative (GI-PD) control; that is, by Routh’s stability criterion, we demonstrate that the system matrix under GI-PD control can be stabilized more easily; by linear system theory and Lyapunov method, we demonstrate that GI-PD control can deal with the uncertain nonlinearity more effectively; by analyzing and comparing the integral control action, we demonstrate that GI-PD control has the better control performance. Design example and simulation results verify the justification of our conclusions again. All these mean that GI-PD control has the stronger robustness and higher control performance than PID control. Consequently, GI-PD control has broader application prospects than PID control.

General Integral Control, PID control, GI-PD Control, Robust Control, Output Regulation

Liu, B. , He, B. and Luo, X. (2015) On the Comparisons of PID and GI-PD Control. Engineering, 7, 387-394. doi: 10.4236/eng.2015.77035.