Research On The Simulation Technology Of TCAS? Collision Avoidance Model

The density of traffic in some central airports and other busy airspace increase continuously,and the horizontal and vertical distance between the traffic decreases,and there are frequent incidents of dangerous convergence between aircrafts.Among these dangerous situations,the middle-air collision between aircrafts is noteworthy.Nowadays,many scholars both at home and abroad are studying good collision avoidance system to guarantee the flight safety,among which TCASII is the most widely studied.Based on the operation principle of TCASII,according to the probability table in RTCA DO-185 standard,the basic data was generated randomly.Based on this data,the encountering model was established,which can be used to simulate the trajectorys of the two encountering aircrafts with MATLAB.The flight trajectorys of two encountering aircrafts were divided into two directions: the horizontal direction and the vertical direction.First of all,the basic parameter data of the closest point of approach was generated,and the trajectory expression before and after closest point of approach was predicted and calculated.Rectangular coordinate system was adopted among the encountering model,with the position of t=40s as the origin of coordinates,the trajectory duration is 50 s,and the update rate of the trajectory coordinate is 1s.The simulation results show that the generated encountering model meets the collision conditions without escape maneuver measures.The simulation analysis shows that:The encountering model can test function of the Resolution Advisory of TCASII.The encountering model can be used as simulating verifying platform,it can be applied to verify the performance of TCASII minimum system,and provide the simulation technology basis for the new collision avoidance system,it provides a certain theoretical basis for the domestic manufactured collision avoidance system,and provides a certain reference for the development of domestic manufactured collision avoidance equipment,which can be used as a necessary tool to study the domestic manufactured collision avoidance system.