Micro thrust measuring method and devices

Abstract

The invention belongs to the technical field of micro thrust measurement, and especially relates to a micro thrust measuring method. The invention further provides a pendulum micro thrust measuring device and a three-wire torsion pendulum micro thrust measuring device. Under the condition that the gravity direction and the micro thrust direction are perpendicular to each other, a micro thrust physical variable is converted into a displacement physical variable based on the principle of mechanical equilibrium. The problem in the prior art that measurement is of low precision and large error due to the fact that the thrust and the gravity are in the same direction, the sensitivity to the mass change of a thruster or other factors is solved. The method and the devices have the beneficial technical effects of no influence of gravity, small friction, and good damping effect.

Description

technical field [0001] The invention belongs to the technical field of micro-thrust measurement, and in particular relates to a micro-thrust measurement method. At the same time, the invention also provides a single pendulum micro-thrust measurement device and a three-wire torsional pendulum micro-thrust measurement device. Background technique [0002] Micro-thrust measurement technology refers to the measurement of thrust between a few micronewtons and several Newtons. This technology is a main content of the electric thruster thrust test. The micro-thrust test has several characteristics: 1. High sensitivity, thruster The thrust produced is between a few micronewtons and a few Newtons, and for such a small thrust, many factors that are usually negligible are enough to drown it out, for example, the sound of human footsteps or general experimental operations etc. may have a great impact on the test results. Second, the thrust-to-weight ratio is very small. Compared with th...

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Problems solved by technology

[0004] The present invention provides a method and device for measuring micro-thrust to solve the problems in the prior art mentioned in the above-mentioned background art, such as the fact that the thrust and gravity are in the same direction or are sensitive to the mass change of the thruster, etc., resulting in low accuracy and big error problem

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