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Dynamic force measuring method

A measurement method and dynamic force technology, applied in force/torque/work measuring instruments, measuring devices, measuring rapid changes, etc., can solve the problems of cumbersome test procedures, and achieve the effect of wide application, high accuracy and easy operation.

Active Publication Date: 2016-12-07
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

If changing a force generating device with a different force value range means that a spring with a suitable stiffness needs to be reselected, compared to other thrust measurement methods, this will cause the test procedure to be too cumbersome

Method used

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Examples

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Embodiment Construction

[0049] The following uses attitude / orbit control rocket engine dynamic thrust measurement (hereinafter referred to as attitude and orbit control rocket engine) as an example to illustrate the application of the dynamic force measurement method of the present invention. Dynamic force measurements in different fields need to use the method of the present invention flexibly.

[0050] In this example, the dynamic thrust measurement system of the attitude / orbit control rocket engine has been calibrated statically and dynamically and within the error range. The static calibration adopts the weight increase and decrease method or the mechanical screw loading method, and the dynamic calibration adopts the force hammer hammering method. . The dynamic thrust measurement system has been calibrated or dynamically and statically calibrated and meets the technical requirements. The data volume of the data acquisition system of the dynamic thrust measurement system is sufficient and the accu...

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Abstract

The invention discloses a dynamic force measuring method, and belongs to the technical field of dynamics and signal processing. The method includes the steps of collecting input signals, output signals and other signals through a dynamic force measuring system, drawing a curve through drawing software, primarily judging all the signals to obtain signal feature values and feature functions, deducing the transfer function relation of the input signals and the output signals, and reckoning the output signals or the input signals by means of a transfer function. The method is wide in application range, easy to operate and reliable in result and is suitable for occasions where dynamic force can not be directly measured, and the accuracy of the obtained result is high.

Description

technical field [0001] The invention belongs to the technical field of mechanics and signal processing, and in particular relates to a measurement method for dynamic force. Background technique [0002] Dynamic force refers to the force generated when an object such as a part or component undergoes acceleration or deceleration motion (linear or rotational motion), a single-degree-of-freedom object is forced to vibrate by an external force, and the force or rotational moment generated when an object is accelerated or decelerated in a rotational motion . There are two types of force measurement: static and dynamic. Among them, static measurement refers to the measurement of a quantity whose value can be considered constant during the measurement period; while dynamic measurement refers to the measurement performed to determine the instantaneous value of the quantity and its change with time, that is, the measured value changes with time. Dynamic force has various manifestati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01L23/00G01L23/22
CPCG01L5/00G01L23/00G01L23/22
Inventor 徐勇郭红杰
Owner BEIHANG UNIV
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