Micro-thrust and micro-impulse applying device and method based on the principle of light pressure

Abstract

The invention provides a micro-thrust and micro-impulse applying device and method based on the principle of light pressure, which generates micro-thrust to a target through the action of light pressure reflected by laser light. The device includes a laser, a laser adjusting device, a beam splitter, a shutter, a mirror, and a laser power meter. The laser beam is generated by the laser, the laser characteristics are adjusted by the laser adjusting device, and then divided into two paths by the beam splitter, one of which reaches the position of a laser power meter, and the measured power is used to determine the laser power used for micro-thrust application. The other way is irradiated on the mirror mounted on the target through the shutter, and then generates a micro thrust to the target.The light reflected by the mirror reaches another laser power meter, and the power of the two lasers is measured in real time by using two laser power meters. , Combining parameters such as reflectivity and the incident angle of the laser irradiating the mirror, the micro-thrust acting on the target can be calculated, and then the laser output power can be adjusted in real time according to the calculated micro-thrust to meet the demand. Record the thrust and micro-impulse data applied to the target, and record the response of the target under its action, which can be used to calibrate the high-precision micro-thrust and micro-impulse measuring device.

Description

technical field [0001] The invention relates to the technical fields of precision mechanics and aerospace propulsion, in particular to a device and method for applying micro-thrust and micro-impulse based on the principle of light pressure. Background technique [0002] With the development of high-precision technology and industrial fields, in the fields of aerospace propulsion, precision instrument and equipment manufacturing, and biomedicine, the demand for precise application and control of micro-thrust and micro-impulse is increasing, and the application is becoming more and more extensive. [0003] Common micro-thrust application methods mainly include contact thrust application method and non-contact thrust application method. Among them, the contact thrust application method refers to the use of light and small objects to contact the target, and the piezoelectric sensor installed at the contact position to determine the magnitude of the thrust applied; or use an accu...

AI Technical Summary

Problems solved by technology

When using this method, the accuracy of thrust application is limited by the thrust detection range and sensitivity of the piezoelectric sensor or the accuracy of object mass weighing, and it is usually difficult to accurately apply a micro-thrust of less than 1 μN

The non-contact thrust application method includes the capacitive method and the electric comb method using electrostatic force. Through precise control of the electrode voltage and electrode distance, a small thrust as low as nN level can be achieved on the target. This type of method needs to be on the target object. Installation of capacitor plates or electric comb devices, etc., the operation process of setting up and applying thrust is more complicated

In addition, the non-contact thrust application method also includes the method of using magnetic force, which has problems such as the difficulty of accurately controlling and calculating the magnetic force, and the need to accurately control the relative distance between the magnets.

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