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Non-load-sharing piezoelectric thrust test device

A testing device and thrust technology, which are applied in the field of unloaded piezoelectric thrust testing devices, can solve the problems of poor frequency response performance and difficulty in meeting the sensitivity of piezoelectric thrust testing devices, and achieve high sensitivity and meet dynamic thrust transmission requirements. , the effect of improving sensitivity and dynamic measurement accuracy

Active Publication Date: 2017-02-22
YANTAI VOCATIONAL COLLEGE
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of the poor frequency response performance of the above-mentioned strain type thrust test device and the difficulty in meeting the high-precision test requirements in the sensitivity of the piezoelectric thrust test device, and to design a non-load sharing device with good frequency response performance and high sensitivity. Piezoelectric Thrust Test Device

Method used

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Embodiment Construction

[0016] The specific implementation manner of the present invention will be described in detail in conjunction with the accompanying drawings and technical solutions. as attached figure 1 , 2 , 3, 4, 5, and 6, the specifications and sensitivities of the four piezoelectric quartz sensors 3 are exactly the same. The Y0° cut quartz wafers are installed in pairs, and the maximum sensitivity direction of each wafer is strictly consistent, and the charge signal is drawn out through the electrode piece sandwiched in the quartz wafer. During assembly, four sets of pre-tightening bolts 4 and square pressure plates 5 are used to rigidly connect the inner shell 2, four piezoelectric quartz sensors 3 and the outer shell 1 together to ensure that the maximum sensitivity direction of each sensor is strictly consistent and perpendicular to the On the upper surface i of the inner shell, ensure that the symmetrical center of each sensor is aligned with the axis of the pre-tightened threaded h...

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Abstract

The invention provides a non-load-sharing piezoelectric thrust test device, belongs to the technical field of sensors and measuring and control technology, and particularly relates to the test technology of the pulse thrust of attitude control rocket engine. The test device comprises an outer shell, an inner shell, four piezoelectric quartz sensors, four square press plates, four support rods, an engine installation flange, pre-fastening bolts and connection bolts. Piezoelectric quartz sensors made of four YO cut type quartz chip resemble a diamond shape and are located between the inner shell and the outer shell. Four pre-fastening bolts and square press plates are used for pressing all the piezoelectric quartz sensors tightly. Rocket thrust force generated by fuel ejection is transmitted to the piezoelectric sensors through the installation flange, the four support rods and the inner shell, thus eliminating the load division phenomenon in the traditional piezoelectric test system caused by bolts connection or an elastic ring clamping which are adopted by the piezoelectric quartz sensors for pre-fastening, and enhancing the sensitivity and the dynamic measurement accuracy of the test system. The device has the advantages of having high sensitivity, good frequency response performance, being high in dynamic measurement accuracy, therefore can be adopted for testing the pulse thrust of the attitude control rocket engine.

Description

technical field [0001] The invention belongs to the technical field of sensors and measurement and control thereof, in particular to a no-load sharing piezoelectric thrust test device. Background technique [0002] Attitude-controlled rocket engines are an important part of modern space vehicles, and are widely used in tasks such as attitude correction, position maintenance, and formation flight of satellites and other spacecraft. Thrust is an important parameter to characterize engine performance, and its accurate measurement is of great significance for engine nozzle configuration optimization, satellite attitude control and fuel estimation. The attitude control rocket engine has two working modes, namely steady state mode and pulse mode. Compared with the engine in the steady state mode, the pulse mode saves fuel and can extend the service life of the satellite, so it is more widely used. [0003] There are two main types of traditional thrust test devices: strain-based...

Claims

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Application Information

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IPC IPC(8): G01L5/00
CPCG01L5/00
Inventor 邢勤杨少慧杨延峰
Owner YANTAI VOCATIONAL COLLEGE
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