Model uncertain boundary-based planet landing trajectory tracking robust control method

Abstract

The invention relates to a model uncertain boundary-based planet landing trajectory tracking robust control method, in particular to a trajectory tracking robust control method in a planet landing process under the condition that a detector is disturbed by multiple sources, belonging to the technical field of deep space detection guidance and control. According to the method, in consideration of influences of a target celestial body gravitation model and outside interferences and other uncertain factors on trajectory tracking, the design concept of a model uncertain boundary is introduced; through designing a robust feedback control rule and ensuring the nonlinear characteristic of a control mechanism, a deviation between an actual tracking trajectory and a feedforward guidance design trajectory does not exceed an expected boundary, therefore, the landing trajectory tracking performance of the planet detector disturbed by multiple sources is optimized, the influences of the multi-source disturbance and system uncertainty on the landing flight trajectory of the detector can be effectively overcome, the control performance of the detector system is improved, and the landing flight trajectory control precision of the planet detector is ensured.

Description

technical field [0001] The invention relates to a robust control method for planetary landing trajectory tracking based on model uncertainty bounds, in particular to a trajectory tracking control method under the condition that the detector is disturbed by multiple sources during the planetary landing process, which belongs to deep space exploration guidance and control technology field. Background technique [0002] In the process of planetary landing, there are related uncertain factors such as the uncertain gravitational field of celestial bodies and external interference, and the perturbation caused by these uncertain factors will continue to increase as the height of the probe decreases, which requires The tracking control algorithm of the detector has a certain ability to deal with unknown factors. Usually for lunar exploration missions, due to the long-term observation of the target celestial body, relatively complete celestial body characteristic information is obta...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method based on model uncertain A Robust Control Method for Trajectory Tracking of Planetary Probe Landing

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