Reliability Modeling of Two-unit System with Degradation Interdependence

The interdependence of the degradation process is widespread in multi-unit systems. Effective analysis of the interdependence in the degradation process is essential to model the reliability of multi-unit systems. This study establishes a unilateral dependence and interdependence degradation processes model based on the Wiener process, and analyzes the reliability and failure intensity of the two-unit parallel and series system. The influence of the interdependence on the reliability and failure intensity of the two-unit system is obtained using a numerical model.