Method for directly calibrating micro thrust and micro impulse

Abstract

The invention discloses a method for directly calibrating micro thrust and micro impulse. By the method, the characteristics of uniform magnetic induction intensity distribution and extremely small magnetic flux leakage in an electromagnet air gap are utilized, a current-carrying wire passes through the air gap, the action of certain ampere force is applied to the wire, and the ampere force and the acting time are measured, so that the micro thrust and the micro impulse can be calibrated. When static thrust is calibrated, a stressed coil is arranged at a stressed point of a measuring device, the position of an electromagnet is adjusted, the ampere force direction of the stressed coil is taken as the thrust direction to be calibrated, and the static thrust can be calibrated according to the linear relation between the current of the stressed coil and the stressed ampere force. When the micro impulse is calibrated, the current of the stressed coil and the acting time of the current are measured, and the impulse of the ampere force can be acquired by using the calibrated linear relation between the current and the ampere force of the stressed coil, so that dynamic impulse can be calibrated. The method overcomes the defect of the conventional calibrating method and has the outstanding advantages of small error, high precision, wide calibrating range and the like.

Description

technical field [0001] The invention relates to a direct calibration method of micro-thrust and micro-impulse, especially applied to the calibration of micro-thrust and micro-impulse measuring equipment such as electric propulsion and laser micro-propulsion, such as torsion pendulum, gravity pendulum and electromagnetic balance. Background technique [0002] The measurement of the thrust and impulse of the micro thruster is generally to place the thruster on the measuring bench, and obtain the thrust or impulse indirectly by observing the mechanical behavior of the thrust measuring device under the action of the micro thrust. Micro-thrust and micro-impulse measuring devices include torsion pendulum, gravity pendulum and electromagnetic balance. [0003] There are currently two practical methods for direct calibration of micro-thrust, one is the gravity method, and the other is the electromagnetic force method. [0004] There are two ways to calibrate the static force by the...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a measuring device with small error for torsional pendulum, gravity pendulum, electromagnetic balance and other measuring devices in view of the problems that the existing direct calibration method of micro-thrust and micro-impulse has large error and too small thrust and impulse are difficult to calibrate. , wide calibration range, high precision, simple and reliable micro-thrust and micro-impulse calibration method

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