Simple method for measurement of sweepback angles of missile wing

Abstract

The present invention provides a simple method for measurement of the sweepback angles of a missile wing. Three datum points A, B and C which are not located on the same line are arranged at the upper of the missile wing, lines are scribed on the missile wing and a projectile body, a rope and a ruler are employed to measure the distances among the datum points and the distances between the datum points to the Dk; a coordinate system is built in a plane ABC; and the space coordinate values of all the feature points Dk and the sweepback angles of the missile wing are obtained through calculation according to the geometric equation, and the confidence interval of the sweepback angles of the missile wing is calculated according to the measurement precision of the ruler. The simple method for measurement of sweepback angles of the missile wing employs common tools to measure the sweepback angles of the missile wing, is easy to realize and is not high in the requirement of the measurement environment, and is very suitable for measurement of the sweepback angles of the missile wing in the field conditions; the simple method for measurement of sweepback angles of the missile wing can replace an expensive three dimensional measuring machine or a three-dimensional measurement machine to measure the sweepback angles of the missile wing so as to observably save the measurement cost; and the simple method for measurement of sweepback angles of the missile wing can calculate the confidence interval of the sweepback angles of the missile wing so as to provide reference data for an emission decision.

Description

technical field [0001] The invention relates to a simple method for measuring the backsweep angle of an elastic wing, which is especially suitable for measuring the backsweep angle of an elastic wing by using common tools such as ropes and dimensions after long-distance transportation and under the condition of an external field lacking precise measuring instruments. Background technique [0002] The sweep angle of the wing is extremely important for the range and strike accuracy of the bomb. After long-distance transportation, the sweep angle of the wing is easily affected by shock and vibration and deviates from the design value. Therefore, in the field environment after long-distance transportation, it is generally necessary to measure the sweep angle of the wing before launching. [0003] In engineering, a three-coordinate instrument or a three-dimensional measuring machine is generally used to measure the sweep angle of the wing. Due to the expensive equipment of the ...

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