Non-linear tracing control method capable of prolonging service life of space moving part

Abstract

Provided is a non-linear tracing control method capable of prolonging the service life of a space moving part. The angular speed threshold and the angular speed of a movement stopping area are calculated at first, then judgment on the movement stopping area is carried out, azimuth dimension and pitch dimension of the movement stopping area are set if a target is located in the movement stopping area, non-linear control on a mechanism is finished if the target is located outside the movement stopping area, a radar control system continues outputting calculated values to a mechanism controller, and a control mechanism can trace movement of the target. The non-linear tracing control method achieves mechanism control optimization through a non-linear method, effectively overcomes the defects of a general mechanism control method, reduces frequent vibration of the mechanical moving part, prolongs the service life of the mechanism, is easy to achieve in engineering and is very suitable for the field of guiding butt joint between an accompanying satellite and an aircraft.

Description

technical field [0001] The invention relates to a nonlinear tracking control method for improving the service life of space moving parts. Background technique [0002] At present, spaceborne radar mainly uses two-dimensional mechanical mechanisms to track targets in real time, and guide satellites to accompany the flight or dock the aircraft. Usually, there is a linear relationship between the angular velocity sent by the radar to the mechanism and the distance of the target from the antenna normal, and this relationship is the radar error slope. In the process of tracking the target, the radar will continuously send angle error information to the mechanism. Long-term tracking will cause wear and tear on the mechanical moving parts and reduce the service life of the mechanism. Frequent shaking of the mechanical moving parts will generate disturbance torque on the satellite body and increase the satellite attitude control. The burden affects the control accuracy of the platf...

AI Technical Summary

Problems solved by technology

The AB dotted line represents the linear relationship between them. The larger the slope, the stronger the radar tracking control ability, but a little deviation between the target and the normal will cause a huge angular velocity control mechanism, causing the mechanism to shake

Decreasing the slope can reduce the jitter of the mechanism, but it will cause the radar to fail to keep up with fast-moving targets

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