Measuring device and measuring method for airflow parameters of telescopic airfoil parachute

Abstract

The invention discloses a measuring device and a measuring method for airflow parameters of a telescopic airfoil parachute. The measuring device comprises a single-chip microcomputer master controller, a stepping motor and an airflow data measuring rod; the single-chip microcomputer master controller is used for receiving ripcord status information and airfoil parachute height information, generating a command for triggering the airflow data measuring rod to extend according to the ripcord status information, and generating a command for triggering the airflow data measuring rod to retract according to the airfoil parachute height information; the airflow data measuring rod is driven to extend or retract by the stepping motor according to the commands generated by the single-chip microcomputer master controller; the airflow data measuring rod is provided with an airfoil parachute airflow parameter detection sensor. According to the measuring device and the measuring method disclosed by the invention, after the airfoil parachute is opened, the measuring device extends from an airfoil parachute load, so an airfoil parachute system is prevented from being broken by sharp edges and extending fragile elements; a parachute cord or a vertical tube cannot be wound, and therefore the airfoil parachute is opened safely, and the measuring device cannot be broken in a parachute-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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