Spinning unfolding and folding optimum control method of dual-body star space tethered formation system

Abstract

The invention provides a spinning unfolding and folding optimum control method of a dual-body star space tethered formation system. The method includes the steps that first, constraint conditions are determined, wherein the constraint conditions comprise a controlled quantity constraint, a state constraint, a terminal constraint and a dynamics constraint; secondly, performance indexes are selected according to task requirements; afterwards, the optimum control quantity M and the optimum ideal condition are acquired through an hp-self-adaptation pseudo-spectral method; at last, a state error measuring controller and an executing mechanism error controller are designed to control errors of the ideal condition and the optimum control and errors of the virtual condition and practical control respectively. According to the spinning unfolding and folding optimum control method of the dual-body star space tethered formation system, a spinning kinetic model is established based on spinning motion, the dual-body star space tethered formation system can be controlled to complete a spinning unfolding and folding task smoothly under the certain performance indexes and the constraint conditions, and certain theoretical reference is provided for spinning unfolding and folding control of a general dual-body star space tethered formation system.

Description

technical field [0001] The invention relates to an optimal control method for spin deployment and recovery of a two-body star space tether formation system. The method can be effectively applied in the spin deployment and recovery process of the two-body star space tether formation system. Background technique [0002] The two-body star space tether formation system is a new type of space formation system, which consists of a main spacecraft located in the formation center and two space tethers (called spiral arms) distributed around the main spacecraft and connected to it. composed of sub-spacecraft. The space tethers in the formation are generally tens to hundreds of meters, and the main spacecraft has the ability to release, recover and control the connected space tethers). The main spacecraft can generate spin torque through its own thruster and other actuators, thereby prompting the entire formation system to perform spin motion in space at a certain angular velocity, ...

AI Technical Summary

Problems solved by technology

But releasing or recovering the tethers in the formation, that is, changing the length of the spiral arm in the formation, will lead to changes in the rotation speed and the angle of the rotation arm of the formation, and the ideal rotation speed and radiation open-loop configuration of the formation will also change affected

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