Advanced Controllers for Feed Drives
نویسنده
چکیده
To achieve the high precision required in future contouring machining applications. accurate servo-controllers for the feed drives are needed. For this purpose conventional P controllers. which are utilized on many CNC systems, are not adequate. and more advanced control algorithms must be implemented. This paper summarizes existing servo-controllers for contouring applications and presents an evaluation of three basic types of controllers: feedback controller, feedforward controller, and cross-coupling controller. The evaluation of servo-controllers includes: ( l) their abilities in eliminating different error sources and (2) their practical limitations in machine-tool control. The evaluation is supported by simulation and experimental results. In addition, some directions for future servo-control algorithms are also suggested.
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