Parachute system for unmanned aerial vehicles, that is independently turn against the wind

Abstract

Tactical UAV are used to monitor the battlefield, identify targets, perform missions to provide fire support for troops, target artillery systems, etc. With the use of a high-speed target load aboard the aircraft, there is an urgent need to save not only the airframe, but also the equipment along with the information. The design of modern parachutes must be based on the condition of providing maximum aerodynamic resistance with a minimum design mass, which is especially important for the UAV due to its relatively small mass.An analysis of recent studies and publications has shown that existing parachuting systems can not independently turn against the wind without external intervention. With the use of parachutes, which is characterized by axial symmetry in the air flow, the problem of deceleration of the UAV in space is solved, the main parachute is stabilized and put into operation. However, by themselves, such air systems will not be able to turn in a horizontal flow against the wind.The parachute system is proposed can independently turn against the wind. This will reduce the horizontal and vertical components of the landing speed. The parachute system proposed for the UAV differs from the well-known fact that in the places of attachment of slings fastened vertical cloths, which, when vertically and horizontally displaced, will orient the parachute system and UAV against the wind. It will allow to reduce the landing speed when lowering and landing UAV, and also prevent overlapping parachute when put into operation (when opening).Two variants of the location of the longitudinal axis relative to the wind direction are considered.It is proved that the dome of the parachute turns against the wind and is in a position of stable equilibrium in cases where the wind force acts on the PS both on the front and on the back.Consequently, the scheme proposed by the authors of the parachute system will be able to provide a landing of the UAV against the wind, which will reduce the vertical and horizontal velocity, will increase the payload of UAV, and, using modern materials, reduce the mass-size dimensions of the parachute system for use on the UAV.