An on-line characterization system has been developed for DC motors working in Micromanufacturing applications. These sensitive applications require high precision and high speed of response. The system has been programmed on ARM microcontroller, it actuates DC motor and automatically collects data while it is being accelerated and attains a steady speed ; the embedded routines process it instantly and returns the current values of inertia, friction coefficient, back-emf constant and torque constant. A prototype system for DC motor control has been developed in laboratory, it has been characterized and control experiments have been performed. when such Micromanufacturing applications progress in real-time, any change in the motor parameters, consequently in transfer function, can be found and utilized for better performance.
A robust and high precision control system has been designed in MATLAB for a prototype DC motor system running at high rpm with uncertainty in plant parameters and in the presence of plant disturbances and measurement errors. The controllers have been designed using variety of approaches PID, LQG, and LSDP. Each of these design in MATLAB meet rise time, settling time and peak percent overshoot as [0.0765 s, 0.403s, 11%], [0.019s, 0.0877s, 13.2%,], [0.153s, 0.637s, 9.36%], [0.153s, 0.632s, 9.36%] for PID, LQG, LSDP-I & II respectively. Simulation designs have been further hand tuned to get better results to achieve the required specifications. The digital implementation have been done on MCB2300 KEIL boards on ARM7 (32-bit) microcontroller using difference equation methods and controller performances have been evaluated.
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