Safe landing system and method for parafoil with flared landing function

Abstract

The invention discloses a safe landing system and method for a parafoil with a flared landing function. The safe landing system comprises a master controller, an altitude sensor, a three-axis acceleration sensor, two servo motors, two winches and two flared landing devices. The master controller acquires altitudes and descending speeds through the altitude sensor and the three-axis acceleration sensor so as to control the servo motors and the flared landing devices. A servo mechanism controls the aviation direction of the parafoil through pulling trailing edge control ropes on the two sides of the parafoil, and downward pulls the trailing edge control ropes on the two sides of the parafoil synchronously for flared landing operation after receiving a command of motor flared landing. The flared landing devices contract springs to downward pull the trailing edge control ropes for flared landing after receiving a command of spring flared landing. The safe landing system and method for the parafoil with the flared landing function can enable the parafoil to land with the lowest velocity vector, and impact at the moment of landing is reduced; and different flared landing modes are adopted according to situations, and the stability of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of parafoil landing, and in particular relates to a parafoil safe landing system and method with the function of bird landing. Background technique [0002] Compared with traditional parachutes, controllable parafoils have superior maneuverability and are widely used in military, aerospace and civilian fields. With the advancement of technology, the control method of the controllable parafoil has changed from pilot control to remote control, and then it can achieve autonomous homing without manual control. During the parafoil homing process, the parafoil can complete the actions of gliding, turning, deceleration and sparrow landing by pulling the trailing edge control ropes on both sides. Sparrow drop can be defined as: when the parafoil approaches the ground in a gliding state, if the two control ropes are pulled down simultaneously at a relatively fast speed, the forward speed and vertical speed of the pa...

AI Technical Summary

Problems solved by technology

In the bird drop stage, the manipulation force required for the entire pull-down process can reach 10%-15% of the gravity of the suspended mass. In order to ensure the bird drop effect, the entire manipulation process must be limited to a very short time. Once the load quality is high , the manipulating force required for sparrow landing is correspondingly increased, which puts forward very high requirements on the power of the servo motor, and the power of the motor limits the weight of the load (Zhao Qiuyan, Wing Parachute Sparrow Drop Technology. Aerospace Return and Remote Sensing, 1999 (02) :p.5-9)

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