Abstract
Computers are increasingly used for implementing controlalgorithms in safety-critical embedded applications, such asengine control, braking control and flight surfacecontrol. Consequently, computer errors can have severe impact on the safety of such systems. Addressing the coupling of control performance with computer related errors, this paper develops a methodology for analyzing the impact data errors have on control system dependability. The impact of a data error is measured as the resulting control error. We use maximum bounds on this measure as the criterion forcontrol system failure (i.e., if the control error exceeds a certain threshold, the system has failed).In this paper we a) develop suitable models of computer faults for analysis of control level effects andrelated analysis methods, and b) apply traditional control theoryanalysis methods for understanding the impacts of data errors onsystem dependability. An automobile slip-control brake-system is used as an example showing the viability of our approach.
| Original language | English |
|---|---|
| Pages (from-to) | 2623-2633 |
| Journal | IEICE Transactions on Information and Systems |
| Volume | E86-D |
| Issue number | 12 |
| Publication status | Published - 2003 |
Subject classification (UKÄ)
- Control Engineering
Free keywords
- verification and dependability analysis
- error analysis
- error modeling
- safety-critical systems
- control systems