Multiple-constraint multi-spacecraft flight interval indicating and collision avoidance method

A multiple-constraint multi-spacecraft flight interval indicating and collision avoidance method includes the following steps: (1) confirming magnitude of attitude control average force according to telemeasuring data value of propellant consumed by attitude control of launched spacecrafts on an orbit under the cruising attitude, (2) conducting high-accuracy orbit prediction according to initial ephemeris information of each spacecraft and the attitude control average force confirmed in the step one, calculating ephemeris of each spacecraft in an inertial frame at any time and relative distance between each spacecraft at any time, and confirming the minimum relative distance between the spacecrafts, (3) changing the direction of the attitude control average force, repeating the step one and the step two, calculating the minimum value of the minimum relative distance between each spacecraft, namely, the direction of the attitude control average force corresponding to the minimum value is the worst situation, (4) comparing the minimum value confirmed in the step three with the minimum safe distance, when the minimum value is greater than the minimum safe distance, the spacecrafts has no risk of collision, otherwise, within a first circle observation and controlling track segmental arc, one spacecraft which is selected conducts orbital maneuver, and thereby the distance between the spacecrafts is widened and the collision risk of the spacecrafts is avoided.