Fundamentals of Implementing Real-Time Control Applications in Distributed Computer Systems |
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Authors: | Törngren Martin |
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Affiliation: | (1) Mechatronics lab, Dept. of Machine Design, The Royal Inst. of Technology, S-100 44 Stockholm, Sweden |
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Abstract: | Automatic control applications are real-time systems which pose stringent requirements on precisely time-triggered synchronized actions and constant end-to-end delays in feedback loops which often constitute multi-rate systems. Motivated by the apparent gap between computer science and automatic control theory, a set of requirements for real-time implementation of control applications is given. A real-time behavioral model for control applications is then presented and exemplified. Important sources and characteristics of time-variations in distributed computer systems are investigated. This illuminates key execution strategies to ensure the required timing behavior. Implications on design and implementation and directions for further work are discussed. |
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Keywords: | control applications closed-loop control multi-rate systems distributed systems real-time computer systems timing analysis timing jitter |
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