Abstract
We have constructed a failure diagnosis system using a quick identification method named as SANQ system identification [1], and verified the effectiveness and performance under the deterministic situation. However when the application of this method is considered, it is necessary to investigate the performance under the stochastic situation caused by, e.g. disturbances and measurement noises. In this paper, we will verify characteristics and tolerance of the SANQ method under a stochastic situation, through simulation studies for a ship propulsion system. And we will try to modify the algorithm of the SANQ method so as to improve its performance under such a situation.
