A feedback scheduling algorithm for real time control systems

In this paper, the scheduling issue of periodic tasks with task dependencies is discussed. A feedback scheduler with frequency actuator and performance index is presented. Worst-case response time analysis that affects the real-time deadline miss ratio is analyzed. With the proposed scheduler, the schedulability of periodic tasks that have varied frequencies can be enhanced in the context of real-time control systems. Examples show that, this feedback scheduler can achieve high CPU utilization and guarantee a certain deadline miss ratio in real-time control systems without sacrificing the system stability