Offene Antriebsreglerplattform

The increasing demands of dynamics and accuracy in machine tools and the requirement of many additional features, like process or machine monitoring, effect not only the construction of tool machines but also the drive control. In the drive control of the present days, specialized digital signal processors and microcontrollers are used. Because they are made for standard drive control with high quantities and low prices, there is a lack of flexibility and openness towards new sensors or control algorithms. To include new technologies in an existing drive control severe changes in both software and hardware are required. This makes it difficult and expensive to adjust the drive control to the special needs of manufacturing processes and machines differing from the standard. In this thesis a new approach for drive control is shown which fulfills the requirements of present-day machines and future developments in that it is flexible and open so it can be easily adjusted to special processes and machines. This flexibility is achieved by a hardware based on programable logic. A library provides modules, containing all the functions for the drive control, process control, sensors analysis, machine monitoring, etc. The drive controller can be configured out of this library so that it provides exactly the functions needed by the process or machine. Besides the programable logic, the drive control provides slots where hardware interfaces towards sensors, actors, or fieldbusses can be added. This thesis introduces the architecture of an open drive control, covering the modularization of the drive functions, the infrastructure needed for execution of the modules, for communication in between the modules, and for monitoring them. The openness and flexibility of the system requires special development tools also shown here. As verification of this concept, an implementation of the open drive control architecture is shown controlling a linear direct drive, which demonstrates a basic library of drive function and a drive control configured with modules from this library