Consistent distributed vibration control method for solar panel of spacecraft

Abstract

The invention provides a consistent distributed vibration control method for a solar panel of a spacecraft. The method comprises the following steps: dividing an internally consolidated solar panel into a plurality of intelligent components which can be independently controlled according to the characteristics of structure assembly, and constructing a finite element model of a single intelligent component and an overall structure finite element model oriented to distributed control after assembly based on a mass matrix, a damping matrix and a stiffness matrix of each intelligent component, designing a distributed controller by combining a graph theory and a consistency theory, wherein the designed overall controller is in a matrix form of each distributed controller comprising a feedback stabilization item and a consistency collaboration item. According to the distributed control method containing the consistency collaboration item, vibration of a satellite solar panel can be effectively restrained, the dynamic performance of the system is improved, the convergence speed is higher, meanwhile, the robust fault-tolerant capability is high, vibration control can still be achieved by means of the consistency collaboration item under the condition that a part of the control system fails, and the method is suitable for large-scale popularization and application. And closed-loop stability of the system is ensured.

Description

technical field [0001] The invention relates to the technical field of dynamics and structure control of aerospace, in particular to a method for uniform distributed vibration control of solar panels of spacecraft. Background technique [0002] At present, there are mainly two types of vibration control for spacecraft solar panels: centralized control and decentralized control. For centralized control, regardless of the classical control algorithm or modern control theory, the information of the entire structural vibration control is stored in a central controller for processing and calculation; Less robust to controller failures. In addition, the efficiency of controller solution calculation will decrease as the number of degrees of freedom increases. With the emergence of large space structures such as space solar power satellites, the structural size of solar panels can reach hundreds of meters, requiring a large number of sensors and actuators to complete the control t...

AI Technical Summary

Problems solved by technology

For centralized control, regardless of the classical control algorithm or modern control theory, the information of the entire structural vibration control is stored in a central controller for processing and calculation; Less robust to controller failures

In addition, the efficiency of the controller solution calculation will decrease as the number of degrees of freedom increases

With the emergence of large space structures such as space solar power satellites, the structural size of solar panels can reach hundreds of meters, requiring a large number of sensors and actuators to complete the control task, which will lead to a large and complex system

In order to improve the solution efficiency of the centralized controller, modal truncation is often used to reduce the system dimension, but this also has problems such as observation overflow

For distributed control, each controller only uses the local information of the sailboard structure when designing, and the information transmission and exchange between subsystems lacks corresponding guidelines. The interaction between subsystems affects the overall performance of the system. is handled by adjusting the control gain of each controller

This is a passive adaptation method for the interaction between the subsystems of the physically fixed solar panels, and it is difficult to achieve the optimal control of the overall system.

The above two control strategies cannot guarantee the fault-tolerant performance of the entire spacecraft solar panel control system when one or part of the controllers fails.

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