Interference-free negative step force applying device and method

Abstract

The embodiment of the invention discloses an interference-free negative step force applying device and method, and the device comprises a linear bearing system (4) which is installed at the central part of a support system (1) through a fastening device (2) and a switching device (3); the top of the linear bearing system (4) is connected with a fine line (6), and a weight (4.8) is placed in the center of the upper surface of a tray (4.6) at the bottom of the linear bearing system (4); the pulley system (5) is fixed to the top of the support system (1) through the fastening device (2) and usedfor guaranteeing wiring of the fine line (6); a semicircular closed ring is arranged on the left side surface of the electromagnet (7) and is used for being connected with the fine line (6); the powersupply system (8) is used for carrying out power supply and outage operation on the electromagnet (7); and the magnetic cushion block (9) is adhered to the surface of a loaded object.

Description

technical field [0001] The invention relates to the field of measurement. More particularly, it relates to a device and method for applying a non-disturbing negative step force. Background technique [0002] The six-degree-of-freedom micro-vibration induced by the spacecraft’s reaction wheels, control moment gyroscopes, and solar wing drive mechanisms when they are in orbit will significantly reduce the imaging quality and pointing accuracy of the spacecraft. The micro-vibration characteristics of the spacecraft can guide the micro-vibration suppression design of the spacecraft. The piezoelectric six-degree-of-freedom micro-vibration measurement platform has been widely used in the micro-vibration measurement of moving parts due to its advantages such as high overall structural rigidity and good performance at medium and high frequencies. , The ultra-low frequency performance is not good, and static measurement cannot be performed. Considering that the micro-vibration lev...

AI Technical Summary

Problems solved by technology

However, there are two objective factors in this loading method that will directly affect the loading accuracy. On the one hand, the weights are suspended by thin wires to form a swing system. It is not a standard step force applied to the loaded object behind the wire; on the other hand, in the process of cutting or burning the thin wire, unnecessary human interference factors will be introduced due to human operation, which will affect the step force. Loading accuracy

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