Spacecraft anti-interference attitude control method of measurement and control link under replay attack

Abstract

The invention relates to the spacecraft anti-interference attitude control method of a measurement and control link under a replay attack. The method aims at a spacecraft attitude control problem whenthe measurement and control link between a spacecraft and a ground system is subjected to the replay attack and the spacecraft is disturbed by an environment. The method comprises the following stepsof firstly, establishing a spacecraft attitude control system model when the measurement and control link is subjected to the replay attack and the spacecraft is disturbed by the environment; secondly, designing a full-order observer to observe an attitude control system state and an augmented system state formed by an interference, and using observer information to construct a composite controller; and then, analyzing the replay attack so as to provide a unified framework, constructing a virtual system and virtual control input for the augmentation system, and verifying whether the spacecraft attitude control system can detect the replay attack; and finally, under the condition that the attitude control system can not detect the replay attack, designing a controller containing a watermark label and constructing the spacecraft anti-interference attitude control method when the measurement and control link is subjected to the replay attack. The method is suitable for the high-precisionand high-reliable control of a spacecraft attitude.

Description

technical field [0001] The invention relates to an anti-jamming attitude control method of a spacecraft in which the measurement and control link is attacked by playback, which can solve the high-precision and high-reliability control of the attitude system of the spacecraft measurement and control link under the playback attack in the interference environment. Background technique [0002] With the development of aerospace technology, more and more precise space missions require the spacecraft attitude control system to have high control accuracy. However, on the one hand, due to the complex space environment, the spacecraft is disturbed by the external environment such as solar radiation torque, gravity gradient It has gradually become the strategic commanding heights for all countries in the world to maintain national security and vital interests. Space confrontation has become an important strategic means of the country. The replay attack causes the ground system to rec...

AI Technical Summary

Problems solved by technology

Similarly, if the attacker replays the historical value of the measurement information to us, under certain conditions, the error will not change, and the system will not be able to detect the attack

Chinese patent application number 201510652179.3 proposes a satellite navigation forwarding spoofing attack defense method and device. However, the forwarding spoofing attack is different from the replay attack. The real signal is not erased. The patent selects the largest signal in the world as the real signal. In the replay attack, the enemy not only replays the historical value of the measurement information to us, but also erases the real measurement information. Make the system unable to obtain real measurement information; Chinese patent application number 201010042089.X proposes an anti-replay attack system for industrial wireless networks, but this patent introduces a third-party detection module, which not only increases the Complexity, which also affects the rapidity of the control system

To sum up, the existing methods are unable to achieve high-precision and high-reliability control of the spacecraft attitude for the control problem of the system under the replay attack in the interference environment

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