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Fuzzy feedback scheduling of resource-constrained embedded control systems

By Feng Xia, Youxian Sun, Yu-chu Tian, Moses O. Tade and Jinxiang Dong

Abstract

Abstract. The quality of control (QoC) of a resource-constrained embedded control system may be jeopardized in dynamic environments with variable workload. This gives rise to the increasing demand of co-design of control and scheduling. To deal with uncertainties in resource availability, a fuzzy feedback scheduling (FFS) scheme is proposed in this paper. Within the framework of feedback scheduling, the sampling periods of control loops are dynamically adjusted using the fuzzy control technique. The feedback scheduler provides QoC guarantees in dynamic environments through maintaining the CPU utilization at a desired level. The framework and design methodology of the proposed FFS scheme are described in detail. A simplified mobile robot target tracking system is investigated as a case study to demonstrate the effectiveness of the proposed FFS scheme. The scheme is independent of task execution times, robust to measurement noises, and easy to implement, while incurring only a small overhead

Topics: Feedback scheduling, Fuzzy logic control, Embedded control systems, Resource management, Mobile
Year: 2009
OAI identifier: oai:CiteSeerX.psu:10.1.1.312.8583
Provided by: CiteSeerX
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