Study and Design on Single-Controller and Multi-loops Networked Control System Based on the Task Scheduling with Self-Adaptive Prior

摘要

To aim at the problem of networked control system which is the hotspot of research and application nowadays, a method of self-adaptive prior scheduling of mult-tasks is presented. It is that the prior of each task is determined by its evaluated factors, and then the tasks are dynamicallly scheduled by their priors in the single-controller. The shecduling rules and the structure of scheduling algorithm are given in this paper. A practical example that the DC motors of X, Y and Z axis of a simple three-axis gear machine tool are controlled by single-controller and through a network is given in this paper, where the the controlling error and the sampling period and the importance of each task is adopted as its assessing factors to calculate its prior dymanically. The results of simulation on the platform of TRUETIME shows that the mentod presented in this paper is correct and practical.