Study on Safety Analysis Method to Task Process of Civil Aircraft Weather Radar System

Abstract

To solve the task-process-safety problem of airborne weather radar system, a set of case-inspired safety analysis method is proposed based on the STAMP(Systems-Theoretic Accident Model and Process). Taking weather radar system's task process in approaching stage as an example, a hierarchical control structure is constructed to identify unsafe control actions during the task process, and analyze the potential hazard causes associating with unsafe control actions. Then a safe flight control structure model is constructed and the accident case of Delta Airlines is analyzed to optimize the model. The safety of system task process is improved through putting forward the safe constraints which can control the propagation mechanism of accident. It is indicated through the above analysis that the method can comprehensively identify the potential hazard causes of system, and provide technical support for the safety design of airborne weather radar system.

Keywords

• airborne weather radar
• task process
• system theory
• accident model
• process model
• stamp theoretical method
• case-inspired
• approaching stage
• hierarchical control structure
• unsafe control action
• flight accident
• hazardous causes
• safe constraint
• evolution mechanism of accident
• model optimization
• safety design
• technical support