Method and device for measuring longitudinal gravity center of coaxial helicopter

Abstract

The embodiment of the invention provides a method and device for measuring the longitudinal gravity center of a coaxial helicopter. According to the method, a horizontal gravity center measuring toolor more than three platform scales can be directly used for carrying out measurement to obtain the horizontal gravity center, so that the longitudinal gravity center of a coaxial helicopter is calculated. Compared with the prior art, a wedge-shaped cushion block is not needed and thus the complex work of wedge-shaped cushion block installation and leveling is omitted, so that the preparation workload is reduced. Moreover, on the basis of the relatively accurate horizontal gravity center, the obtained longitudinal gravity center is relatively accurate. And the further determined longitudinal gravity center of the coaxial helicopter is more accurate. Therefore, on the premise that the horizontal gravity center is relatively accurate, the accuracy of the measured longitudinal gravity center is improved, so that large errors possibly caused by the longitudinal gravity center by being compared with the prior art are reduced.

Description

technical field [0001] The invention relates to the technical field of longitudinal center of gravity measurement, in particular to a method and device for measuring the longitudinal center of gravity of a coaxial helicopter. Background technique [0002] In the field of helicopter flight performance calculation and flight control design, data such as the center of gravity of the helicopter are often needed. These data play a key role in the accuracy of helicopter flight performance calculation and the correctness of flight control design. [0003] At present, the center of gravity of the coaxial helicopter in the helicopter can generally be measured by the following steps: [0004] Put the coaxial helicopter on the horizontal center of gravity measuring tool, put the landing gear of the coaxial helicopter on the known pressure sensors at four relative positions on the horizontal center of gravity measuring tool, and read the values ​​of each pressure sensor. Using the prin...

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Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide a method and device for measuring the longitudinal center of gravity of a coaxial helicopter, which is used to solve the complicated and laborious preparation work before measuring the center of gravity in the prior art, and will affect the measurement result of the horizontal center of gravity, resulting in measurement There is a technical problem with a large error in the center of gravity

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