On overload control of SPC-systems

摘要

Though we foresee SPC-systems later during this decade with very powerful control systems, the need for efficient overload control mechanisms will increase. In this paper, we have briefly described the environment in which these switches will work. Though system complexity will increase in general, it is important to keep the overload control mechanisms predictable, straightforward and robust. We have stressed that the design of overload control mechanisms must be done in conjunction with the design of the control system. We would like to point out the importance of studying time dependent behaviour of modern SPC-systems in general and especially their overload control mechanisms. This, indeed, seems to be a very urgent task. We have so far only reached a point of basic understanding of these mechanisms. It is also important to have the performance, derived from various analytic and simulation based models, supported by measurements from systems in use. Traditional stochastic models do suffer from limitations. We need to develop efficient numerical solution methods for many of today's models as well as to develop new models based on perhaps non-traditional approaches.