Measurement method for spatial six-dimensional force

Abstract

The invention discloses a measurement method for a spatial six-dimensional force, and the method is used for measuring the spatial six-dimensional force of an aircraft model, and employs a mode of combining a double-tail support and bracing wires. The method comprises the steps: considering the model to be fixed in an actual measurement process, building a mathematic model of a six-dimensional force withstood by the model in a space according to the principle of static equilibrium, measuring the component of an acting force withstood by the model through a three-directional pressure sensor installed at a tail supporting rod and a unidirectional force piezoelectric sensor connected with an upper bracing wire and a lower bracing wire, and achieving the measurement of the six-dimensional force withstood by the model through solving the built mathematic model. According to the invention, the method has the advantages in that the bracing wires are small in supporting interference and a hard-type supporting system is good in stability, and overcomes the difficulties of big vibration and instability when a narrow, long and heavy module employs a single-tail supporting mode. After the bracing wire auxiliary supporting is added, the method improves the rigidness of a testing system, reducing the pressure on the rigidness design of a tail support, and reduces the size of the tail support.

Description

technical field [0001] The invention belongs to the technical field of sensors and measurement and control, and relates to a method for measuring space six-dimensional forces applicable to aircraft models. Background technique [0002] In the field of aviation, it is necessary to design and improve the aircraft model according to the force state of the aircraft model. Therefore, it is of great significance to measure the space six-dimensional force on the aircraft model. The traditional measurement method is to use support methods such as belly support, back support, and tail support for the aircraft model, and measure it through strain sensors. There are different degrees of support interference in this support method, which seriously affects the precision and accuracy of the measurement data. Therefore, reducing or correcting the support interference problem can effectively improve the precision and accuracy of measuring the force state of the aircraft model. The essenc...

AI Technical Summary

Problems solved by technology

Although the tension line measurement can solve the problem of support interference very well, the hanging point of the pure tension line support on the model destroys the shape of the model, and it is difficult to avoid the sensitive area of ​​the detached vortex, which is very easy to occur in the test swing, affecting test accuracy

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