Micro thrust test system and method

Abstract

The invention discloses a micro thrust measuring system. The micro thrust measuring system is applied to tests according to which micro thrusts range from 1 mN to 1000 mN and a thrust-weight ratio ranges from 10<-5> to 10<-2>. With the micro thrust measuring system adopted, measurement accuracy can be greatly improved under the condition that measurement bandwidth is enough. The micro thrust measuring system comprises a bench, a displacement sensor, an online calibration assembly, a damping system and computer measurement and control equipment; the computer measurement and control equipment includes a high-frequency data acquisition card, an industrial personal computer and a display device which are connected with one another; the displacement data of the reflection-type laser displacement sensor are processed through the industrial personal computer, and the processed displacement data are displayed through the display device; the industrial personal computer controls the height of a lifting platform, measures thrust response under the loading of a standard weight and achieves steady thrust calibration; and the industrial personal computer controls the damping system to make the bench stand still. The invention also provides a test method using the device.

Description

technical field [0001] The invention belongs to the technical field of physics, and in particular relates to a micro-thrust test system and a test method using the system, which is mainly used for a thrust of 1-1000mN and a thrust-to-weight ratio of 10 -5 ~10 -2 Range thrust test. Background technique [0002] The characteristic of micro thrusters is that the thrust is relatively small, and the thrust is generally in the order of hundreds of millinewtons. It is difficult to accurately measure such a small thrust. For microthrusters, it can also work in pulses, so there is not only the problem of how to measure small thrusts, but also the pulse impulse. In order to shorten the test preparation time and reduce the influence of environmental noise, the damping of the bench must be considered; in order to avoid the zero drift of the long-term test, the problem of online calibration thrust must be considered. Therefore, thrust measurement technology with high precision and hig...

AI Technical Summary

Problems solved by technology

However, the measurement bandwidth of the existing micro-thrust measurement technology is insufficient, and it is difficult to measure micro-thrust and micro-impulse at the same time. At the same time, it is necessary to realize online calibration and provide easy operation and environmental applicability

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