Method and system for on-orbit correction of orbit control strategy based on thruster bias estimation

Abstract

The invention discloses an orbit control strategy on-orbit correction method and system based on thruster deviation estimation. The method includes: separately obtaining the positions of the center of mass of the entire satellite, the first orbital thruster and the second orbital thruster relative to the layout system information; and, obtain the thrust vector directions of the first orbital control thruster and the second orbital control thruster; perform on-orbit identification, and determine the generation of the first orbital control thruster and the second orbital control thruster according to the on-orbit identification results The torque; construct the disturbance torque evaluation function; solve the disturbance torque evaluation function, determine the minimum value of the disturbance torque evaluation function, and calculate the jet pulse width; perform orbit control according to the calculated jet pulse width. The invention adopts the energy optimal principle to update the orbit control thrust distribution strategy on the orbit, and realizes the minimization of the orbit control interference.

Description

technical field [0001] The invention belongs to the technical field of orbit control, and in particular relates to an orbit control strategy on-orbit correction method and system based on thruster deviation estimation. Background technique [0002] Generally speaking, the design of satellite platforms is based on the load requirements. Most of the loads have certain requirements on the orbital accuracy of the satellite, and the initial low launch of the satellite, the impact of orbital perturbation during the orbit operation, etc. will make the actual orbit There is a certain deviation from the nominal orbit, so the satellite platform is required to have orbit control capabilities. [0003] Ideally, the orbit control thruster should only generate thrust in the required direction, without generating additional force and moment on the satellite. Therefore, it is necessary to comprehensively consider the mass characteristics of the satellite and the installation layout of the t...

AI Technical Summary

Problems solved by technology

However, in the actual satellite development process, due to the general changes in the mass characteristics and installation requirements of the load and stand-alone aircraft, the final mass characteristics will change greatly, and the position of the center of mass may differ from the original design by a few centimeters to dozens centimeter

The design and production of thrusters are relatively mature, and generally do not change. Therefore, the final thruster installation layout may not match the position of the center of mass of the entire star, resulting in large interference generated by the orbital thruster itself, affecting the accuracy of attitude control, and then affecting orbit control. Accuracy, and need to consume additional fuel to balance the disturbance torque generated by the orbital thruster

In addition, a large amount of propellant will be consumed during orbit control, which will also cause the center of mass of the entire star to change, affecting the next orbit control effect

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