Adaptive spacecraft attitude tracking control method based on event trigger mechanism

Abstract

The invention relates to an adaptive spacecraft attitude tracking control method based on the event trigger mechanism. The method comprises steps that a spacecraft dynamics model with external disturbance and a relative attitude tracking error model are established; the event triggering mechanism applied to control is defined, and the relationship between a transmission control torque signal and acontrol torque signal designed by a controller is constructed based on the event triggering mechanism; based on the spacecraft dynamics model and a relative attitude tracking error model establishedin the first step and the relationship constructed between the transmission control torque signal and the control torque signal designed by the controller based on the event triggering mechanism, thereverse step method is utilized to introduce boundary estimates and auxiliary signals, and event-triggered adaptive control of the spacecraft attitude is carried out. The method has advantages of strong anti-interference and small calculation amount, communication traffic of the controller and the update frequency of a control signal can be effectively reduced, and the method is suitable for attitude control on modular spacecrafts with the limited transmission capacity of the wireless network.

Description

technical field [0001] The invention relates to an adaptive spacecraft attitude tracking control method based on an event trigger mechanism, which is mainly applied to the attitude tracking control of modular spacecraft and belongs to the technical field of spacecraft control. Background technique [0002] In recent years, attention has been paid to modular spacecraft. Modular spacecraft adopts a modular open network architecture. Using the basic idea of ​​plug-and-play system, each component of the spacecraft is modularized and assembled, which can reduce the cost of the spacecraft. Speeds up assembly and facilitates easy removal and replacement of defective or obsolete components. The core technology of modular spacecraft is wireless data communication and wireless power transmission, which is different from the traditional cable interconnection that is bulky, bulky, and inflexible. Under this technology, all functional parts of the spacecraft are independent of each other...

AI Technical Summary

Problems solved by technology

However, in this way, whether it is necessary or not, the actuator and the controller must communicate and update the control algorithm at each sampling time, which will cause a waste of network resources and wear of the actuator

Obviously, this method is inappropriate under the condition of limited network resources

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