SOTIF Hazard Analysis for Visual Landing System: A Fuzzy-DEMATEL Method

Aiming at the Safety of the Intended Functionality (SOTIF) of the Visual Landing System (VLS) in the nonlinear coupled operation scenario, a hazard analysis method combining fuzzy theory with Decision-Making Trial and Evaluation Laboratory (DEMATEL) is proposed. Firstly, this paper analyses the VLS’s function and system architecture and identifies the SOTIF causal factors associated with man-machine-environment. Subsequently, the Fuzzy-DMATEL method is employed to quantify the centrality and causality scores of each causal factor. Finally, the risk mitigation measures for key causal factors are given. The results show that the proposed method can effectively perform hazard analysis and overcome the ambiguity and uncertainty of expert evaluation, which provides a reference for the safety design of VLS.