Method and device for measuring longitudinal center of gravity of a coaxial helicopter

Abstract

Embodiments of the present invention provide a method and device for measuring the longitudinal center of gravity of a coaxial helicopter, wherein the method can directly use a horizontal center of gravity measurement tool or three or more platform scales to measure the horizontal center of gravity, so as to calculate the longitudinal center of the coaxial helicopter. Compared with the prior art, the center of gravity does not require a wedge-shaped spacer, which saves the complicated work of installing and leveling the wedge-shaped spacer, and reduces the workload of preparation. Moreover, based on the relatively accurate horizontal center of gravity, the obtained longitudinal center of gravity is relatively accurate. The further determined longitudinal center of gravity of the coaxial helicopter is more accurate. In this way, on the basis that the horizontal center of gravity is relatively accurate, the accuracy of the measured longitudinal center of gravity is improved, and the larger error that may be introduced by the longitudinal center of gravity compared with the prior art is 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 required. 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 measurement tool, put the landing gear of the coaxial helicopter on the four known pressure sensors at the relative positions of the horizontal center of gravity measurement tool, and read the value of each pressure sensor. Using t...

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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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