An On-Board Diagnosis Hardware for Embedded Systems

被引:0
|
作者
Hiratsuka, Satoshi [1 ]
Fusaoka, Akira [1 ]
机构
[1] Ritsumeikan Univ, Dept Human & Comp Intelligence, Kyoto, Japan
关键词
D O I
10.1109/MESA.2008.4735741
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, we propose a hard-wired method for on-board diagnoses of embedded systems based on the model-based diagnosis. In (he recent works of on-board diagnoses, the qualitative deviation models are widely used for the abstraction of the continuous dynamics of a system, so that the fault detection and isolation is reduced to the satisliability test for the set of constraints written in Sign Algebra. However, the algorithm for SAT(SATisfiability test for propositional formula) is not applicable directly for the real-time diagnosis due to its computational complexity. We transform the constraints in Sign Algebra into the set or the Boolean equations. The diagnosis algorithm is described in the form of logical functions that are parameterized solutions of (lie equations, and we implement these solutions in logical circuits in order to achieve the more accurate and quick responsible diagnoses. We use a specific application: the electronic throttle system of automobiles, to discuss the design method and its actual feasibility.
引用
收藏
页码:449 / 454
页数:6
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