Design of Heuristic Algorithm for Non-linear System

Department of Electronics and Instrumentation Engineering, St. Joseph’s College of Engineering, Affiliated to Anna University, Chennai 600119, India. Corresponding author (Email: dhineshmani@yahoo.co.in) Department of Mechatronics Engineering, Kongu Engineering College, Affiliated to Anna University, Perundurai 638052, India. (Email: bmp@kongu.ac.in) Abstract In most of the industries tanks are used for mixing process. Normally, cylindrical tanks, cylindrical tanks with conical bottoms are used. Spherical tanks can be used to replace the conventional tanks, beacause of its increased production efficiency due to thorough mixing and discharging of materials, due to its cross section area. Controlling liquid level in it is highly challenging. Interacting spherical two tank system (ISTTS) is considered as nonlinear system in this paper. ISTTS is highly nonlinear system due to variation in cross area with respect to flow of liquid. Controlling the liquid level is highly challenging task in this system. Hence, heuristic algorithm such as Bacterial foraging optimization (BFO) based PID, BFO based I-PD controller is designed for the system. Heuristic algorithm is an optimization technique, which solves problem more easily than classic methods. BFO I-PD controller has no peak overshoot when compared to BFO PID controller in the servo response.