Stochastic analysis and control of real-time systems with random time delays

• Published in: Automatica (Oxford) Vol. 34; no. 1; pp. 57 - 64
• Main Authors: Nilsson, Johan, Bernhardsson, Bo, Wittenmark, Björn
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1998; Elsevier
• Subjects: Applied sciences; Computer science; control theory; systems; Control Engineering; Control system analysis; Control theory. Systems; Delay compensation; distributed computer control systems; Electrical Engineering, Electronic Engineering, Information Engineering; Elektroteknik och elektronik; Engineering and Technology; Exact sciences and technology; Optimal control; real-time systems; Reglerteknik; stochastic control; stochastic parameters; Teknik; timing jitter; Delay compensation; timing jitter; distributed computer control systems; stochastic control; stochastic parameters; real-time systems; Suboptimal control; Optimal control; Stochastic control; Performance analysis; Communication network; Real time system; Delay
• ISSN: 0005-1098; 1873-2836
• DOI: 10.1016/S0005-1098(97)00170-2

The paper discusses modeling and analysis of realtime systems subject to random time delays in the communication network. A new method for analysis of different control schemes is presented. The method is used to evaluate different schemes suggested from the literature. A new scheme, using so-called timestamps, for handling the random time delays is then developed and successfully compared with previous schemes. The new scheme is based on stochastic control theory and a separation property is shown to hold for the optimal controller.