Tuning of robust PID controller using mine blast algorithm

Thispaper proposes a novel strategy for tuning Proportional Integral Derivative (PID) controllers based on mine blast algorithm. A PID tuning problem that satisfies multiple H_∞ condition is selected for the study. This problem suffers from conservative assumptions associated with any existing method. Such a problem can be easily solved without using any complicated manipulation by implementing Mine Blast Algorithm (MBA) for gain tuning scheme for PID controller. This enables us to solve for the desired PID gain values just by solving a constrained MBA problem in a simple way. We have proposed a mis-fitness function based on the response characteristic of the plant with controller. The H_∞ criterion is imposed as a constraint on the optimization problem. There is however no theoretical proof attesting the effectiveness of the proposed method as MBA is fundamentally a stochastic optimization tool. Hence multiple problems have been discussed to demonstrate the effectiveness of proposed method to obtain PID parameters subjected to H_∞ conditions.