Failure performance evaluation method for medium orbit navigation constellation satellite

The invention relates to the technical field of satellites, and particularly discloses a method for evaluating failure performance of a medium-orbit navigation constellation satellite, which comprises the following steps of: S101, establishing a simulation scene of the medium-orbit navigation constellation satellite by taking Walker as constellation configuration; s102, dividing the failure modes into coplanar satellite failure and non-coplanar satellite failure according to the orbital plane where the failure satellites are located and the number of the failure satellites; s103, establishing a multi-satellite failure model based on a Monte Carlo method, and simulating a satellite failure event according to a failure mode; and S104, according to the PDOP value and the constellation value CV, determining the health state of the middle orbit navigation constellation satellite after failure. 本发明涉及卫星技术领域，具体公开了一种中轨导航星座卫星的失效性能评估方法，包括：步骤S101，以Walker为星座构型建立中轨导航星座卫星的仿真场景；步骤S102，根据失效卫星所处的轨道面以及失效卫星的数量，将失效模式分为共面卫星失效和非共面卫