In-orbit calibration method for milli-newton-scale thrust of electric propulsion system

• Main Authors: GAO JUN, TANG ZHANGYANG, LIU GUOXI, LIU ZHONGHAN, LIU RUI, DING FENGLIN, FAN WEI, LI ZONGLIANG, ZOU DAREN
• Format: Patent
• Language: Chinese; English
• Published: 28.08.2018
• Subjects: AIRCRAFT; AVIATION; COSMONAUTICS; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES OR EQUIPMENT THEREFOR

The invention discloses an in-orbit calibration method for the milli-newton-scale thrust of an electric propulsion system, and relates to the technical field of electric propulsion of spacecrafts. Themethod comprises the following steps of (1) adjusting the thrust direction of a selected electric thruster to point to the positive direction of a Z axis; (2) changing the rotation speeds of corresponding momentum wheels to keep the attitude of a satellite unchanged; (3) obtaining the angular accelerations of the four momentum wheels within an ignition duration t through calculation; (4) calculating the change rates of angular momenta of the satellite in the three directions of a coordinate system OXYZ; (5) calculating the torque generated by the selected electric thruster to the satellite inthe three directions of the coordinate system OXYZ; (6) calculating the thrust of the selected electric thruster; (7) calculating the average thrust of the selected electric thruster; (8) repeating the first to seventh steps,