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Nature inspired algorithms are among the most potent and robust algorithms for optimization for solving the real life problems. This paper introduces the Bat algorithm for the optimization based design of the PID controllers. The optimized PID controller has been implemented for liquid level control system which finds a wide application in petrochemical,(More)
The power system is a dynamic system and it is constantly being subjected to disturbances. It is important that these disturbances do not drive the system to unstable conditions. Due to certain disturbances, electromechanical oscillations of small frequency set up. The kind of stability involved due to oscillations falls under small signal stability. The(More)
Nature inspired algorithms are the most popular and robust algorithms for the optimization of the real world problems like pitch control of an aircraft system. This paper introduces Bat algorithm and Differential Evolution technique for the multi-objective optimization based designing of the fractional order PID (FOPID) and integer order PID controllers.(More)
Nature inspired algorithms are nowadays aiding in solving several complex multi-objective engineering problems. In this paper, robust pitch control of a flight control system has been designed using fractional order controllers. In order to obtain the optimal values of the controller gains & orders such that the system offers robust response, the mixed(More)
This paper qualitatively, compares MRAC and Modified MRAC scheme when the adaptation laws are designed using different approaches. The controller parameter adaptation laws are designed based on the MIT rule and Lyapunov theory. The effect of augmenting the system with PID has also been studied. The augmented system provided better responses.
A two degrees of freedom controller is designed for multiple inputs multiple outputs system with multiple time delays. An H&#x221E; norm of closed loop optimized decoupled smith control method is used to design feedback controller for disturbance rejection. The reference tracking controller is determined using H<inf>2</inf> norm of model matching optimal(More)
The paper reports on application of two available numerical solvers-HIFOO and HINFSTRUCT for structured and fixed-order controller design, to a feedback linearized Continuous Stirred tank Reactor (CSTR). These solvers constitute a most practical exploitation of the research in numerical techniques for non-convex non-smooth optimization and results in design(More)