A Robust Control Method for Planetary Dynamic Descending Section Based on Thruster Error Compensation

Abstract

The invention discloses a planet power descending section robustness control method based on thruster error compensation. Concerning the problem that a thruster of a planet landing device has greater errors in a power descending section, a robustness landing control method having compensation for the executing mechanism is designed. The planet power descending section robustness control method comprises steps of establishing a planet landing device descending section control system state space model containing the thruster implementation mechanism errors, establishing a state estimation system containing the thruster implementation mechanism errors and designing a sliding mode interference observer and then utilizing the output feedback to design the robustness control method having compensation for the thruster execution mechanism errors based on the sliding mode interference observer. The planet power descending section robustness control method based on thruster error compensation is strong in resisting interference, has the robustness for the thruster implementation errors and is applicable to the precision navigation system in the spacecraft power descending section.

Description

technical field [0001] The invention relates to a planetary power descent robust control method with compensation for the error of a thruster actuator, which is mainly applied to the anti-interference and precise landing control of the power descent section of a planetary lander. Background technique [0002] Since the middle of the 20th century, Mars exploration activities, especially landing exploration activities, have become more and more frequent. With the continuous accumulation of engineering experience and the continuous innovation of scientific theories, the landing accuracy of the probe on the surface of Mars is getting higher and higher. However, due to the long distance and the existence of a large number of uncertainties, many difficulties will still be encountered in the Mars exploration process, which has the characteristics of complex tasks, diverse structures, and unknown environments. [0003] The landing process of the Mars lander includes the atmosphere ...

AI Technical Summary

Problems solved by technology

[0005] The technical solution of the present invention is to provide a robust control method that compensates for the error of the thruster for the actuator error of the thruster during the power descent of the planetary lander, which solves the problem of the planetary lander during the power descent. The error of the actuator in the thruster causes the landing accuracy to decrease

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