Spacecraft formation finite time orbit tracking control method considering communication limitation

Abstract

The invention relates to a spacecraft formation finite time orbit tracking control method considering communication limitation. The method comprises the steps that a spacecraft formation relative orbit model is established; a hysteresis quantizer model is established, and a hysteresis quantizer is adopted to quantize control input signals of slave spacecrafts in the spacecraft formation relative orbit model; in order to facilitate the design of the controller, an intermediate variable is defined; a virtual controller is designed based on a backstepping method and a power integration technology; and according to the designed intermediate variable and the virtual controller, a spacecraft formation finite time tracking controller considering communication limitation is obtained. The controller can ensure that a formation spacecraft realizes tracking control of an expected state in finite time, and the problems of singularity and discontinuity when a finite time tracking controller is designed by adopting a sliding mode control method traditionally can be avoided by adopting a backstepping method and a power integral technology; in addition, the communication load of the control system is effectively reduced through the introduction of a hysteresis quantizer in the design of the controller.

Description

technical field [0001] The invention relates to the field of control technology, in particular to a limited-time orbit tracking control method for spacecraft formation considering communication limitation. Background technique [0002] With the rapid development of spacecraft technology, spacecraft formation flight has become a new research hotspot. Compared with the traditional large single spacecraft, the formation spacecraft composed of multiple small spacecraft with simple structure, low cost and short development cycle The system has the advantages of low system cost, high reliability, strong adaptability and flexibility. In the controller design of formation spacecraft, the convergence speed is an important index. With the increasingly complex tasks of formation spacecraft, higher requirements are put forward for the convergence speed and control accuracy of the spacecraft formation control system. Compared with asymptotically stable control, finite-time control has ...

AI Technical Summary

Problems solved by technology

When the quantized information is transmitted between the controller and the actuator through the wireless network, quantization errors will inevitably be introduced. If the quantization errors cannot be effectively processed, the system control performance will be reduced, and even lead to System collapse brings new challenges to the control accuracy and convergence speed of the system

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