A Method for Determining the Dynamic Coordination Condition of Non-drag Control in Displacement Mode

Abstract

A method for determining the dynamic coordination conditions of a displacement mode drag-free control belongs to the technical field of satellite drag-free control. First, it is assumed that the zero position of the negative stiffness force coincides with the measurement zero position, which is convenient for establishing a single-degree-of-freedom drag-free control dynamic equation of the displacement mode, simplifying the The general dynamic equation of each axis and the degenerate switching dynamic equation; the three parameters of the displacement mode non-drag control system, the maximum thrust acceleration, the negative stiffness coefficient and the mechanical limit, need to satisfy a constraint relationship, which is a kind of system. The basic dynamic coordination conditions that should be satisfied; by solving the four asymptotes of the switching dynamic equation in the phase trajectory diagram, the allowable initial state prismatic region is formed, and the displacement mode when the maximum thrust of the no-drag thruster is insufficient is visually presented Drag-free control yields kinetic coordination conditions.

Description

technical field [0001] The invention relates to a method for determining a dynamic coordination condition of a displacement mode drag-free control, which belongs to the technical field of satellite drag-free control. Background technique [0002] Drag-free control technology is a key technology in the field of gravity field measurement satellites, gravitational wave detection satellites and satellite control technology for equivalence principle testing. According to the different control objects, the no-drag control is divided into two types: acceleration mode no drag control and displacement mode no drag control. [0003] Displacement mode drag-free control requires the use of a continuously adjustable thruster to control the inspection mass in the onboard inertial sensor within a small range of variation around the nominal position in its electrode cage. The acceleration corresponding to the displacement of the test mass relative to the nominal position is the result of t...

AI Technical Summary

Problems solved by technology

For example, if the maximum value of the thrust is too small, the transition time of the relative displacement control response will be too long, and it may not even have the ability to control the inspection mass back to the nominal position from some harsh initial conditions

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