An impulse for writing this book has originated from the effort to sum- marize and publicise the acquired results of a research team at the De- partment of Automation of the Faculty of Electrical Engineering and In- formatics, Slovak Technical University in Bratislava. The research team has been involved for a long time with control problems for machine production mechanisms and, in recent (approximately 15) years, its effort was aimed mostly at the control of electrical servosystems of robots. Within this scope, the members of the authors' staff solved the State Re- search Task Ultrasonic...