UA140282U - UNLIMITED AIRCRAFT WITH DEPRECIATION PNEUMATIC CUSHION - Google Patents

Abstract

Unmanned aerial vehicle with a shock-absorbing air cushion includes a fuselage, a wing located across the central part of the fuselage, a tail, a landing parachute placed in a folded state in the upper part of the fuselage, a shock-absorbing air cushion attached to the vertical during landing. The airbag is divided by an internal partition into compartments, contains an inflatable frame made of elastic sealed material, a gas filling system of an inflatable frame consisting of a liquefied gas cylinder, a valve to turn on the gas filling system and a mechanical drive to turn on the valve from the parachute release. The inflatable frame is connected to a shell made of elastic leaky material, in which holes are made for the passage of air. The inflatable frame is of tubular cross-section, the inner partition is made along the longitudinal axis of the fuselage, so that the cushion compartments are located to the right and left of the fuselage. Holes for the passage of air in the compartments are made in the lower and outer side surfaces of the shell, and the number and size of the holes are the same in the right and left compartments, and their locations are symmetrical.

Description

The utility model belongs to the field of aviation, in particular to unmanned aerial vehicles (UAVs) with a starting weight of 25 kg and more, equipped with a power plant, which can be used to perform aerial photography of the terrain and aerial reconnaissance, as well as the transmission of a video signal in real time.

Most unmanned aerial vehicles do not require an airfield base and use launchers for launch, and a parachute for landing. To date, many unmanned aerial vehicles are known, among them M-10 "Oko" (Ukraine), "AegopashiszOgЮег" and

Vootegapa (Israel), AIIPadip (Germany), "Zastava" (Russia) and others. All of them are equipped with a launcher for launch and a parachute for landing.

The closest analogue is a UAV with a shock-absorbing pneumatic cushion, which includes a fuselage, a wing located across the central part of the fuselage, a tail, a landing parachute placed in a folded state in the upper part of the fuselage, a shock-absorbing pneumatic cushion fixed under the fuselage, with the possibility of its deformation in in vertical and horizontal directions during landing, and the pneumatic cushion contains an inflatable frame made of an elastic hermetic material, a gas filling system of the inflatable frame, consisting of a cylinder with liquefied gas, a valve for turning on the gas filling system and a mechanical actuator for turning on the valve from the release of the parachute, an inflatable frame with connected with a shell made of an elastic non-hermetic material, in which there are holes for the passage of air and internal partitions dividing the pneumatic cushion into compartments (Patent of Ukraine for a utility model Mo 126366, Byul. Mo 11, 2018)

The main drawback is the low transverse stability of the device when landing in conditions of wind erosion at the moment of touching the ground.

The useful model is based on the task of increasing the service life of an unmanned aerial vehicle with a cushioning pneumatic cushion by increasing its lateral stability during landing.

The task is solved by the fact that in a UAV with a shock-absorbing pneumatic cushion, which includes a fuselage, a wing located across the central part of the fuselage, a tail, a landing parachute placed in a folded state in the upper part of the fuselage,

Z shock-absorbing pneumatic cushion fixed under the fuselage, which during landing can be deformed in vertical and horizontal directions. The pneumatic cushion is made of an elastic hermetic material, in which holes are made for the passage of compressed gas. The gas filling system of the pneumatic cushion consists of a cylinder with liquefied gas, a valve for turning on the gas filling system and a mechanical actuator for turning on the valve from the parachute release, the inflatable frame is connected to a shell made of an elastic non-hermetic material, in which there are holes for the passage of air, and an internal partition. that divide the pneumatic cushion into compartments. Compartments with an inflatable frame are made to the right and left of the fuselage, and the internal partition is made along the longitudinal axis of the fuselage, holes for the passage of air in the compartments are made in the lower and outer side surfaces of the compartments relative to the longitudinal axis of the fuselage, and the number, sizes of holes and their locations ensure the same air pressure in the right and left compartments during vertical deformation of the compartments by the fuselage during landing and increased pressure during horizontal deformation of the compartments by the fuselage in the compartment towards which horizontal movement of the fuselage occurs during landing.

The essence of the proposed useful model is explained by the drawings in which Fig. 1 - a cross-sectional image of an unmanned aerial vehicle with a cushioning pneumatic cushion. In Fig. 2 shows an image of the side projection of an unmanned aerial vehicle with a cushioning pneumatic cushion. The landing scheme in the presence of only the vertical component of speed is shown in Fig. 3. The landing scheme in conditions of wind drift to the right is shown in Fig. 4.

The air cushion contains an inflatable frame of tubular section 1, made of an elastic hermetic material, which is connected to a shell 2, made of an elastic non-hermetic material. The pneumatic cushion is divided along the longitudinal axis of the fuselage 9 by an internal partition 4 made of elastic non-hermetic material into compartments 10, 11, located to the right and left of the fuselage. In the lower and side surfaces of the shell 2, holes C are made for the passage of air, and the number and sizes of holes C are the same in the right 10 and left 11 compartments, and their locations are symmetrical.

The UAV is equipped with a gas filling system of the inflatable frame 1 of the pneumatic cushion, which includes a cylinder 5 with liquefied gas, a valve for turning on the gas filling system with a mechanical drive 7 for turning on the valve from the release of the parachute 8.

The landing of the proposed unmanned aerial vehicle is carried out as follows.

After the release of the parachute 8, the gas filling system of the inflatable frame 1 of the pneumatic cushion is activated due to the operation of the mechanical drive 7 of the inclusion valve 6, the cylinder 5 with liquefied gas, for example, carbon dioxide. The inflatable frame 1 is filled with compressed gas and forms a pneumatic cushion. The shell 2 of the air cushion connected to the inflatable frame 1 is deployed and filled with air, which enters through the holes 3 located in the lower and side surfaces of the shell 2. The air cushion, divided by the internal partition 4 into compartments 10, 11, is deployed under the fuselage 9. When hitting the ground, the air in compartments 10, 11 of the pneumatic cushion is compressed and exits through holes C in the shell 2, dissipating the energy of the impact on the ground.

During landing with only the vertical component of speed (Fig. 3), the pressure in both parts of the pneumatic cushion is the same, and with a further increase in pressure, the air simultaneously exits through the holes C in the pneumatic cushion, the pressure decreases and the elastic forces acting on the UAV decrease.

If the landing occurs in conditions of wind drift to the right (Fig. 4), lateral stability

The UAV is provided as follows. Due to the horizontal component of the speed of movement

The air cushion of the UAV is deformed. At the same time, part of the holes C located on the lower and side surfaces of the right compartment 10 will be blocked due to the contact of the pneumatic cushion with the ground. This leads to an increase in the outflow of air through the holes From the left compartment 11 of the pillow and, as a result, a decrease in the air pressure in the left compartment 11 compared to the air pressure in the right compartment 10. Due to the pressure difference, an anti-overturning moment is created, which prevents the UAV from overturning and overturning when landing

Therefore, precisely with such a performance of the shock-absorbing pneumatic cushion, the unmanned aerial vehicle does not lose lateral stability and does not collapse, and thanks to this, the task of increasing the life of the unmanned aerial vehicle during landings is solved.

Claims (1)

USEFUL MODEL FORMULA Zo Unmanned aerial vehicle with shock-absorbing pneumatic cushion, which includes a fuselage, a wing located across the central part of the fuselage, a tail, a landing parachute placed in a folded state in the upper part of the fuselage, a shock-absorbing pneumatic cushion fixed under the fuselage, with the possibility of its deformation in the vertical and horizontal directions during landing, and the pneumatic cushion is divided by an internal partition into compartments, contains an inflatable frame made of an elastic hermetic material, a gas filling system of the inflatable frame, which consists of a cylinder with liquefied gas, a valve for turning on the gas filling system and a mechanical actuator for turning on the valve from the outlet a parachute, an inflatable frame is connected to a shell made of an elastic non-hermetic material, in which there are holes for the passage of air, which is distinguished by the fact that the inflatable frame has a tubular section, the internal partition is made along the longitudinal axis of the fuselage y, so that the pillow compartments are located to the right and left of the fuselage, the holes for the passage of air in the compartments are made in the lower and outer side surfaces of the shell, and the number and sizes of the holes are the same in the right and left compartments, and their locations are symmetrical.