A device and method for measuring airflow parameters of a retractable parafoil

Abstract

The invention discloses a measuring device and method for airflow parameters of a retractable parafoil, wherein the device comprises a main controller of a single-chip microcomputer, a stepping motor and an airflow data measuring rod; Information, according to the state information of the ripcord, the command to trigger the extension of the airflow data measuring rod is generated, and the command to trigger the retraction of the airflow data measuring rod is generated according to the parafoil height information; the stepping motor drives the airflow data measurement according to the command generated by the single-chip main controller The pole extends or retracts; the airflow data measuring pole is provided with a parafoil airflow parameter detection sensor. In the device and method of the present invention, the measuring device protrudes from the parafoil load after the parafoil is opened, avoiding damage to the parafoil system caused by sharp edges and protruding fragile components, and does not cause entanglement to the parachute and standpipe, ensuring This ensures the safe opening of the parafoil, and also ensures that the measuring device itself is not damaged during the opening process.

Description

technical field [0001] The invention relates to an airflow parameter measurement technology of a parafoil system, in particular to a parafoil airflow parameter measurement device and a measurement method thereof which extend out after the parafoil is safely opened and are retracted before the parafoil lands. Background technique [0002] Compared with traditional parachutes, parafoils have better control performance and gliding performance, and can realize high-altitude long-distance delivery and fixed-point landing. They have broad application prospects in the fields of aerospace vehicle recovery, military and civilian material delivery, etc. The measurement of parafoil airflow parameters is one of the most important issues in parafoil aerodynamics. It is used to determine the aerodynamic characteristics of parafoils. The main airflow parameters include angle of attack, angle of sideslip, dynamic pressure, static pressure, and ambient temperature. The parafoil angle of atta...

AI Technical Summary

Problems solved by technology

During the airdrop process of the parafoil system, there are parachute opening stages of free fall, straightening, and inflating, and there are also stages of steady landing and final landing. The rigid-body pitot tube used by the aircraft is directly applied to the parafoil system. On the one hand, the protruding rigid-body pitot tube may be entangled with the parafoil line, so that the parafoil cannot be opened normally, resulting in the complete failure of the airdrop mission. On the one hand, it will also cause damage to the measuring instrument itself; in the final landing stage, there is a large landing impact when the recovery load is used. If the rigid-body pitot tube used in general aircraft is directly used, the airflow measuring device protruding outside the aircraft will be hit. Bad

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