Principal Developments in the Adaptive Control of Machine Tools

Abstract

Although adaptive control (AC) systems for machine tools have a tremendous potential for improving productivity in manufacturing, their acceptance by industry has been slow. This paper identifies the major research and development areas for AC machine tools, and summarizes the principal developments of the last two decades. Current research at The University of Michigan, which is aimed at the development of stable yet high performance AC systems for turning and milling, is also described.

Distributed adaptive control of production scheduling and machine capacity

“…In other words, ACC adjusts the processing parameters in real time to the maximum within the prescribed region bounded by process and system constraints. It has been pointed out that there has been some level of success in the development of ACC for various processes [29,17,15,12].…”

A grey prediction fuzzy controller for constant cutting force in turning

“…This uses a process controller with a force sensor signal to adjust the feedrate, over-riding the knowledge and experience of the programmer. Although this approach could result in significant improvement in productivity [2], it also posed new problems resulting from the inherent variations in the cutting process. Additionally, the force control is very important for many machining conditions such as robot deburring and grinding applications.…”

On the performance enhancement of self-tuning adaptive control for time-varying machining processes

“…To deal with such problems, the adaptive control (AC) of machining processes have been proposed, which adjusts the operating parameters according to the change of cutting conditions [1,2]. Typically, AC systems for machining processes have been classified into two classes in the literature [3], including the adaptive control for optimisation (ACO) and the adaptive control with constraints (ACC). Extensive research has been performed to develop both ACO and ACC systems, but the majority of successful realisations are with the use of ACC systems.…”