Research on Requirements Decomposition Method of Integrated Diagnostics Based on Capability Evaluation

With the application of model-based systems engineering(MBSE) methodology in the process of equipment development, requirements of integrated diagnostics is no longer limited to a few quantitative testability indicators, but puts forward more qualitative capability requirements about condition monitoring, diagnostic reasoning, fault information reporting. But the existing methods can only realize the allocation of quantitative indicators, and there is still a lack of decomposition method of itemized requirements for integrated diagnostics. Thus, this paper proposes a requirements decomposition method of integrated diagnostics based on capability evaluation. Facing all dimensions of capability evaluation, this method defines the trade-off elements and objective function of integrated diagnostics, and puts forward the recommended parameter configuration scheme for different development stages. Finally, this paper presents the specific implementation ways of this method combined with typical cases, which helps to solve practical problems in the development process, such as inadequate requirements decomposition, unable to restrict and guide the design.