Research On The Influence Of Cockpit Noise On Pilot Situation Awareness

According to statistics of noise in some aircraft cabin and analysis on standards and regulations related to cockpit noise,it is concluded that the aircraft cockpit noise should be below 85 d BA.Derive the way noise affects the pilot by studying the pilot's perception and processing process of the cockpit sound.Classify the factors affecting the situation awareness according to the direct and indirect aspects,establish the set of influencing factors,and the qualitative model of situation awareness based on the influencing factors is established.Based on the attention resource allocation,a pilot situation awareness model under the influence of cockpit noise is established.Analyze the formation mechanism of each part of the qualitative model,combine the theory of probability theory and the idea of fuzzy evaluation,from the outside to the inside,quantify the qualitative model to establish a quantitative model of situation awareness under noise.From the three aspects of subjective measurement method,objective measurement method and physiological measurement method,the advantages and disadvantages of the situation awareness measurement method and the limitation of use are discussed.The 3-DSART,SAGAT and eye movement measurement are determined as the fourth chapter experimental measurement method,and how to apply the experiment was explained.Based on the flight simulation platform,the situation awareness measurement experiment under different noise environments is designed.The SAGAT memory exploration questionnaire and the3-DSART questionnaire were designed,and the eye movement physiology measurement method was used to track the subjects.Statistical description and correlation analysis were carried out on the experimental data and the following conclusions were obtained: 1)When the noise level increases,the level of situation awareness of the subject gradually decreases;2)The blink frequency,saccade frequency and pupil diameter can be used as the judgment index of situation awareness level,in which the blink frequency is positively correlated with the level of situation awareness,the eye saccade frequency and pupil diameter are negatively correlated with the level of situation awareness;3)The value calculated by the qualitative model based on attention resource allocation is highly positively correlated with the level of situation awareness.The general idea of the research on the influence of cockpit noise on the pilot's situation awareness is generalized,and the general idea of the influence of the environmental factors in the cockpit on the situation awareness of the pilot is formed: 1)analyze the cause and current situation of the cockpitenvironment;2)establish the set of situation awareness factors,analyze the influence principle of internal environmental factors and other factors on situation awareness,establish a qualitative model of pilot situation awareness in the internal environment;3)quantify the qualitative model and establish a quantitative model;4)design the internal environment as a variable,the situation awareness measurement experiment judges the influence of the internal environment on situation awareness based on the experimental results and draws conclusions.