Real-time Estimation Method of Disturbance Torque During Engine Operation

Abstract

The invention discloses a method for real-time estimation of disturbance torque when the engine is working, which comprises the following steps: Step 1, collecting angular velocity and thruster timing data, collecting high-frequency angular velocity on the star, slow transmission of thruster working timing, and air injection volume data; step 2. Iteration time selection. The iteration step represents the time interval between two integral summations, which determines the data output frequency when the disturbance torque is calculated; step 3, integral summation; step 4, disturbance torque solution, for the satellite attitude dynamic equation Integrate the terms on both sides of the equation separately, and use the integral results obtained in the above steps to invert the solution to obtain the disturbance torque. The method proposed by the invention is simple and can realize multi-purpose reuse, and can be used in the orbit change process of the high-orbit satellite transfer section, the orbit control of deep space exploration aircraft or other orbit control processes, and can also be popularized and used in other spacecraft.

Description

technical field [0001] The invention relates to a method for real-time estimation of disturbance torque, in particular to a method for real-time estimation of disturbance torque when the engine is working. Background technique [0002] High-orbit satellites need to use 490N engines for orbit control in the transfer orbit section. Due to the structure of the 490N engine itself and the impossibility of being completely accurate during the ground debugging and calibration process, the engine will generate thrust that deviates from the theoretical thrust direction when it is working. If the center of mass of the satellite is in the direction of the thrust vector of the 490N engine, the thrust will not interfere with the attitude control; however, due to the deflection of the 490N engine itself and the constant change of the center of mass caused by fuel consumption during the satellite's multiple orbit changes, the thrust of the 490N engine cannot always Passing through the cen...

AI Technical Summary

Problems solved by technology

However, most of them focus on the steady-state operation of satellites in orbit, and no relevant reports have been found on the estimation of the disturbance moment of large-thrust engines such as high-orbit satellites and deep-space exploration satellites during the orbit change process.

Images