Performance re-engineering of embedded real-time systems
Proceedings of the ACM SIGPLAN 1999 workshop on Languages, compilers, and tools for embedded systems
Experimental Assessment of the Period Calibration Method: A Case Study
Real-Time Systems
Feedback–Feedforward Scheduling of Control Tasks
Real-Time Systems
Non-preemptible last section assignment for reducing feedback latency in real-time control systems
International Journal of Systems Science
Performance-aware scheduler synthesis for control systems
EMSOFT '11 Proceedings of the ninth ACM international conference on Embedded software
Embedded Systems Design
Fuzzy logic based feedback scheduler for embedded control systems
ICIC'05 Proceedings of the 2005 international conference on Advances in Intelligent Computing - Volume Part II
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This paper presents a control theoretic approach to optimizing end-to-end timing constraints subject to the performance requirements and the schedulability constraint of a real-time control system. The control performance is specified in terms of control output responses such as steady state error maximum overshoot, settling time, and rise time; and the end-to-end timing constraints include loop processing periods and input-to-output latency. Our approach includes a generic real-time controller model on which our analysis is performed, and a heuristic optimization algorithm which derives end-to-end timing constraints. We apply the approach to the design of an embedded real-time controller and validate it through an experimental study using simulation. Our approach contributes to both the control and real-time areas: (1) it allows control engineers to take into consideration the effect of scheduling latency and sampling periods at the early stage of system design; and (2) it makes it possible to streamline the design of real-time control systems, since temporal requirements are derived in an automatic manner. Our approach can be effectively used with the period calibration method as its front-end.