New controller design for integrating and unstable delay processes

In this paper, nature inspired firefly algorithm has been used for designing of controllers for set-point response and stability purpose. Using firefly algorithm, we have tuned the parameters of above two controllers. A performance criteria integral square error (ISE) is optimized using firefly optimization technique. For the optimum value of ISE, controller parameters are selected. Routh Stability Criteria has been used for designing of disturbance rejection controller. Simulation results show high performance for the set-point response and satisfactory performance for disturbance response.