An anti-jamming and fault-tolerant control method for a Mars lander

Abstract

The present invention relates to an anti-interference fault-tolerant control method of a Mars lander. Firstly, building the attitude kinematics and the dynamics model of the Mars lander; secondly, designing a wind interference estimator to estimate the gust influence on the Mars lander aiming at the influence of the gust at the powered lowering stage at the surface of the Mars so as to perform compensation through a feedforward channel; thirdly, designing an execution mechanism partial failure observer to estimate and compensate the partial failure value of the Mars lander execution mechanism; and finally, recombining the gust interference estimator, the execution mechanism partial failure observer and a PD attitude controller, and constructing a fault tolerance controller of partial failure of the Mars lander execution mechanism. The anti-interference fault-tolerant control method of Mars lander has high anti-interference ability and high reliability, and has a higher practical engineering value compared with a traditional Mars lander control method.

Description

technical field [0001] The invention relates to an anti-jamming and fault-tolerant control method for a Mars lander. Aiming at the partial failure of the executive mechanism in the control system of the Mars lander under the influence of a gust of wind, the idea of ​​anti-jamming and fault-tolerant control is adopted, which improves the efficiency compared with the traditional controller. The reliability of the control system enhances the engineering application value. Background technique [0002] Since humans started space exploration, the exploration of Mars has never stopped. With the goal of finding the second earth where life inhabits, human beings have carried out a series of missions such as orbiting observation, close observation, and landing sampling on Mars, trying to find signs of life on Mars. Finally, in September 2015, NASA found evidence of the possibility of water on Mars, which also marked another historic moment for the Mars mission. As the Mars mission ...

AI Technical Summary

Problems solved by technology

After a long cruising process, the actuators of the Mars lander are prone to loss of accuracy due to partial failure

At the same time, the complex and changeable environment of Mars has greatly affected the completion of command signals by the lander.

For the above two problems of the reduced accuracy of the Mars lander's actuator and the lack of anti-interference ability of the lander, the current research has made some progress, but it cannot solve the situation that the two problems occur at the same time.

Especially when gusts are prevalent on the surface of Mars, the lander needs to increase the thrust of the jet to offset the impact of the environment. At this time, the partial failure of the actuator will have a greater impact on the execution of the command by the lander, eventually causing Lander veers off course leading to mission failure

Images