In this latter, new high-performance processor architectures have been developed and the integration level has been significantly raised so that more complex devices can be put on the same chip. Control performance have been improved by faster processors capable of complex computing. Because higher precision and higher computing speed can be achieved, the control bandwidth is pushed towards the analog limits. Sophisticated algorithms from modern control theory, such as state feedback control, optimal control, and adaptive control, can be implemented in real time using high-performance microprocessors and specialized ASIC’s (Application-Specific Integrated Circuits) . “Sensorless” motion control is possible since the system state variables can be estimated by state observer implemented on microprocessors. Emerging technologies from the artificial intelligence field such as expert systems, neural networks, and fuzzy logic can be now applied to motion control systems owing to DSP’s and ASIC chips