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

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

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.

Liu Dianting | Zhou Dejian | Li Mingtao

[1] Chung Laung Liu,et al. Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment , 1989, JACM.

[2] Y. Tipsuwan,et al. Control methodologies in networked control systems , 2003 .

[3] Chen Jie,et al. Networked Control System and its Application in Fire Control System , 2006, 2007 Chinese Control Conference.

[4] Anton Cervin,et al. TrueTime 1.1 -- Reference Manual , 2003 .

[5] Wang Hai-feng. Status and Prospect of Network Scheduling Algorithm in Networked Control Systems , 2008 .

[6] Anton Cervin,et al. Optimal on-line scheduling of multiple control tasks: a case study , 2006, 18th Euromicro Conference on Real-Time Systems (ECRTS'06).

[7] Asok Ray,et al. Integrated Communication and Control Systems: Part I—Analysis , 1988 .

[8] Hu Wei-li. The Advance of Research on Co-design of Control and Scheduling for Network Control Systems , 2007 .

[9] P. Albertos,et al. RT control scheduling to reduce control performance degrading , 2000, Proceedings of the 39th IEEE Conference on Decision and Control (Cat. No.00CH37187).