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The aim of this work is to design a speed controller of a DC motor by selection of PID parameters using bio-inspired optimization technique of Artificial Bee Colony Optimization (ABC). Here, model of a DC motor is considered as a second order system for speed control. In this work bio-inspired optimization technique in controllers and their advantages over conventional methods is discussed using MATLAB/Simulink. This proposed optimization methods could be applied for higher order system also to provide better system performance with minimum errors. The main aim is to apply ABC technique to design and tune parameters of PID controller to get an output with better dynamic and static performance. The application of ABC to the PID controller imparts it the ability of tuning itself automatically in an on-line process while the application of optimization algorithm to the PID controller makes it to give an optimum output by searching for the best set of solutions for the PID parameters.

This paper proposes a design of a speed control of three phase induction motor fed from wind turbine using genetic algorithm. The wind turbine acts as a prime-mover for doubly fed induction generator. To make the system stable, proper monitoring is required or sometimes an auxiliary system can also be a good option, which can support the primary system during undesirable conditions. The three phase induction motor has wide applications in industries due to its rugged construction, efficiency and low cost. Genetic algorithm is used for estimation of feedback controller parameters for three phase induction motor fed from wind turbine .Genetic algorithm offers certain advantages such as simple computational steps, derivative free optimization, reduced no. of iteration and assured near global optima. The simulation results show a significant enhancement in shortening development time and improving dynamic performance of the induction machine compared to the conventional speed control of induction motor drive.

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In this work, a spectrally efficient 6-user APDCDM based Optical communication system is theoretically investigated and verified using simulation. The data rate considered here is 10 Gbps for each user and it propagates over 150 km standard single mode fiber. Average energy per bit with and without guard band is calculated for all the 64 cases of 6×10 Gbps system. Performance parameters like BER, receiver sensitivity and null to null bandwidth is also evaluated for this system. The simulation design and the analysis are performed using Optisystem and MATLAB.