Application of Intuitionistic Fuzzy Evaluation Method in Aircraft Cockpit Display Ergonomics

The ergonomic level of cockpit display design can be improved by establishing an objective and effective method for evaluating the ergonomics of the cockpit display. Given the fuzz problem in ergonomic evaluation, a new intuitionistic fuzzy evaluation method is proposed based on the Intuitionistic Fuzzy Ordered Weighted Geometric Average (IFOWGA) operator and the possible degree function in this work. Firstly, the intuitionistic fuzzy evaluation matrix considering the hesitation degree of experts' determination is first constructed as the basis of intuitionistic fuzzy evaluation. Secondly, using the IFOWGA operator the intuitionistic fuzzy evaluation values are obtained through aggregating the evaluation matrix. And these values are ranked to get the level of ergonomic evaluation by possible degree ranking function. Finally, an evaluation example based on the cockpit display of a certain aircraft is given to verify the effectiveness of the proposed approach. Six alternatives of the evaluation result are obtained by the aggregation of the IFOWGA operator. Applied the possible degree function, the ergonomic evaluation grade of the aircraft cockpit display is the second level by ranking the alternative sand the variation of intuitionistic fuzzy value is already small when the number of experts is more than 16. It can be shown from the results that the ergonomic level of cockpit display can be objectively and scientifically evaluated by the proposed quantitative method, and it can provide a theoretical basis and practical methods for improving the ergonomic level of cockpit display design.

Optimizing ARINC 661 Rendering for OpenGL with Hardware Support in the JetOS Aviation Operating System

This paper denotes to the problem of the pilot display visualization speed. The software used in avionics has to follow strict rules prescribed by many standards. The studies used OpenGL Safety Critical (SC) with hardware support for Vivante GPU running in the aircraft real time operating system JetOS. One of the avionics standards – ARINC 661 – defines the application rendered in a cockpit display system. It raises the issue of efficient OpenGL SC using to ensure the acceptable visualization speed. Due to the specific of application prepared by the ARINC 661 server the visualization speed for the prospective aircraft platform (i.MX6 processor with Vivante GPU) is too slow to meet aviation requirements. An efficient visualization speed acceleration algorithm has been proposed and implemented. Firstly the OpenGL calls were optimized. But this optimization cannot be directly integrated into the ARINC 661 server. So a special intermediate module was designed and elaborated. The proposed approach makes it possible to achieve a visualization speed acceptable for an aircraft pilot display.