Abstract
A method for the setting and evaluation of TCAS (Traffic Alert and Collision Avoidance System) alerting threshold is proposed in this paper. Firstly, by analyzing the error and uncertainty of the flight path, a stochastic differen- tial equation is introduced to model the random aircraft motion. Then a pilot model according ICAO standards is given to simulate the TCAS alert event. And five kinds of alarm outputs are summed up by analyzing the principle of TCAS alert- ing function. Finally the evaluation system with multiple variables is established on System Operating Characteristic (SOC) curve. The validation of the Encounter model is performed under different parameters. Through the simulation un- der different threshold values, the optimal alerting threshold values are obtained. The experiments show the rationality of the TCAS threshold and verify the validity of our threshold-setting method.
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