Dynamic control system upgrade using the Simplex architecture

Author

Seto, D. ; Krogh, B.H. ; Sha, L. ; Chutinan, A.

Author_Institution

Software Eng. Inst., Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

18

Issue

4

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

72

Lastpage

80

Abstract

One of the most attractive features of computer-controlled systems should be the ease with which they can be modified to incorporate improvements and new capabilities. It would be desirable to make the software changes in a safe and reliable fashion while the system is running. The Simplex architecture, a real-time software technology developed at the Carnegie Mellon University Software Engineering Institute, is designed for this purpose. We introduce the basic structure of the Simplex architecture and describe the types of faults it can handle. We describe the fault detection mechanism based on the trajectories of the physical system in its state space, and derive the control switching logic that determines which controller is chosen to control the physical system in each sampling period

Keywords

computerised control; fault diagnosis; formal logic; process control; real-time systems; software engineering; state-space methods; Carnegie Mellon University; Simplex architecture; control switching logic; dynamic control system; fault detection; real-time system; software change; state space; Application software; Availability; Computer architecture; Control systems; Crops; Production; Real time systems; Scheduling; Software testing; System testing;

fLanguage

English

Journal_Title

Control Systems, IEEE

Publisher

ieee

ISSN

1066-033X

Type

jour

DOI

10.1109/37.710880

Filename

710880