An Equivalent Method of Sky-Earth Control for Hybrid Suspension Ground Microgravity Experiments

Abstract

The invention provides a heaven and earth control equivalence method for hybrid levitation ground microgravity experiment, comprising the following steps: (1) the active operation process of a spacecraft is selected as a simulation object, and a ground simulator is designed according to the principle of similarity; (2) a control law to be verified is selected, and the control force for the ground simulator to reach a desired trajectory in an ideal experiment environment is calculated; (3) the ground simulator is placed in a microgravity environment of magnetic fluid mixed floating, and the control law in step (2) is selected to calculate the control force for the ground simulator to reach the desired trajectory in the environment; and (4) the difference between the control force in step (2) and the control force in step (3) is calculated, the control force difference is applied to the ground simulator, and the control force in the ideal experiment environment is applied to ensure heaven interference and earth interference have the same upper limit, namely, realizing ground experiment equivalent control.

Description

technical field [0001] The invention relates to the design of an equivalent control system for a space active operation ground simulation experiment, in particular to an equivalent method for space and ground control of a mixed suspension ground microgravity experiment. Background technique [0002] A new method of active operation and control of spacecraft, if it is not completely and fully analyzed before launching into space, it is very likely to malfunction, not only making the development investment useless, but also creating space junk. The success of active operation control is closely related to the design of control strategies and control laws. In the face of increasingly complex space maneuvers, the accuracy and efficiency of control laws have become one of the key points of space technology. The performance of the control law has become very important. [0003] Although the existing space-ground equivalent control strategies for verifying aircraft control systems...

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Problems solved by technology

[0018] Based on the simulation of the orbital relative motion control system of the air bearing platform, the existing method can realize full physical simulation, but the space motion of the spacecraft is 6 degrees of freedom, and the suspension height of the air bearing platform at mm level makes the air bearing platform only provide 5 degrees of freedom at most. Simulation of degrees of freedom

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