Abstract:Aircraft stall will affect the flight safety of aircraft. The stall warning computer, as the core control component of the stall warning system, provides a warning to the flight crew by means of light alerts, aural alerts and stick shaker before the stall occurs to remind the flight crew to operate and avoid the aircraft from entering the stall state. According to the classification of development assurance level in SAE ARP4754A, certain functions of stall warning computer are determined as catastrophic level, and its development assurance level is determined as Class A. This paper uses heterogeneous dual-core processor for stall warning computer design. Due to the complexity analog simulation of analysis support for similarity design in the analysis method of ARP4761, this design also refers to the IEC61508 reference standard, the safety performance of stall warning computer using heterogeneous dual-core processor is combed and analyzed. The analysis results show that, compared with the traditional single-core processor or homogeneous dual-core processor, the design of the stall warning computer with heterogeneous dual-core processor has its unique advantages. The advantage lies in the "1oo2D" structure of the heterogeneous dual-core processor, which can meet the requirements of the stall warning computer for high safety and high reliability through calculation and analysis. In accordance with relevant IEC 61508 standards and combined with the high performance requirements of stall warning computers, the correct analysis and design path can ensure that the functional safety integrity level of stall warning computers can be effectively achieved, providing a reference for the design and development of other aviation products.