Title :
Analysis of design trade-offs in the rollback recovery method for fault tolerant digital control systems
Author :
González, Oscar R. ; Tejada, Arturo ; Gray, W. Steven
Author_Institution :
Old Dominion Univ., Norfolk, VA, USA
Abstract :
This paper enhances a recently developed tool to analyze the mean-square stability of digital control systems implemented in computers or embedded processors with rollback recovery that are operating in harsh environments. In particular, closed-loop models are derived that allow the analysis of partial state rollback where not all the states are checkpointed and rolled back. The theoretical results are illustrated with the analysis of a stabilizing controller for the longitudinal dynamics of the AFTI/F-16 aircraft. This example is also used to determine the effect of longer checkpoint durations on the mean-square stability of the flight control system.
Keywords :
aircraft computers; aircraft control; closed loop systems; control system analysis computing; digital control; fault tolerant computing; sampled data systems; stability; system recovery; AFTI/F-16 aircraft; augmented closed-loop flight control model; checkpoint durations; closed-loop models; design trade-offs; digital fly-by-wire aircraft; electromagnetically induced upset generator; embedded processors; fault tolerant digital control systems; flight control system; harsh environments; longitudinal dynamics; mean-square stability; partial state rollback analysis; rollback recovery method; sampled-data flight control system; stabilizing controller; Aerospace control; Aircraft; Checkpointing; Computer errors; Digital control; Embedded computing; Error correction; Fault tolerance; Fault tolerant systems; Robust stability;
Conference_Titel :
American Control Conference, 2002. Proceedings of the 2002
Print_ISBN :
0-7803-7298-0
DOI :
10.1109/ACC.2002.1025418
