Increase Impact Resistance of Drones

A motor designed for unmanned aerial vehicles (UAVs) to prevent damage when landing on rough terrain. The motor has a hub with a skid surface that contacts the motor casing during propeller strikes on the ground. This reinforcement prevents excessive bending of the rotor shaft, which could damage the motor.

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Removable protection for quadcopter drones that provides propeller protection without adding bulk when not needed. The protection consists of removable lateral bumpers that extend beyond the propeller's rotation area. A deformable arm connects Each bumper to the drone's propulsion units on that side. The arm can flex if the bumper hits an obstacle, reducing shock and preventing damage.

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The rapid advancement of 3D printing technologies has greatly assisted drone manufacturing, particularly through the use composite filaments. This paper explores impact fiber-reinforced materials, such as carbon-fiber-infused PLA, PETG, and nylon, on mechanical performance, weight optimization, functionality unmanned aerial vehicles (UAVs). study highlights how additive manufacturing enables fabrication lightweight yet structurally robust components, enhancing flight endurance, stability, payload capacity. Key advancements in high-speed fused filament (FFF) printing, soluble support embedded electronics integration are examined, demonstrating their role producing highly functional UAV parts. Furthermore, challenges associated with material processing, cost, scalability discussed, along solutions advanced extruder designs hybrid approaches that combine CNC machining. By utilizing filaments innovative techniques, continues to redefine production, enabling prototyping on-demand customization. nylon demonstrated outstanding improvements strength-to-weight structural durability, dimension... Read More

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Electrically powered vertical takeoff and landing (eVTOL) multirotor aircraft with active flutter suppression using propeller thrust control. The aircraft has sensors to detect flutter of the lifting surfaces like wings, and a control system adjusts propeller thrust to reduce flutter. This active flutter mitigation prevents instability caused by aeroelastic coupling of structural motion and aerodynamic loads. The sensors detect flutter, the control system generates signals to adjust propeller thrust, and the propellers produce modified thrust to counteract flutter motion and stabilize the lifting surfaces.

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This work presents the development of a novel, articulated small uncrewed aerial system (sUAS) tail with coupled twist-pitch motion via ball-and-socket joint. The joint is controlled by five-bar linkage which allows two servos to together in motion, as opposed dedicated traditional elevator and rudder servo control. constructed synthetic feathers slide over one another splay degree freedom third servo. Additive manufacturing leveraged construction all parts wind tunnel model continuous carbon fiber (CCF) reinforcement, increased structural stiffness from 12 GPa for Nylon 1520 CCF reinforcement. Wind test results are presented 5 7 m/s speed body angles of-5 45 angle attack articulation 30 45 respectively. design was capable enabling fine five axis control (e.g., no roll moment control) pitch twist morphing across broad range airspeeds.

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Unmanned Aerial Vehicles (UAVs), or drones, have become increasingly important in various fields, including aerial photography, delivery services, and surveillance. However, as drone usage has expanded, so the risks related to system failures accidents. Such can result expensive damages even threaten public safety. A promising way address these is by implementing a recovery that uses parachute mechanism. This paper discusses design, development, implementation of parachute-based for drones. It looks into essential components system, such selection, deployment methods, material choices, performance testing. The goal improve safety operations ensuring controlled descents during emergencies, thus minimizing risk crash-related damage.

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Abstract Nowadays, aligned with the national mission, growth of Unmanned Aerial Vehicle (UAV) application is enormous. This research work investigates probability adding epoxy resin novel biofibres such as Tamarindus indica and Morinda citrifolia to fabricate a composite material. A sustainable outcome delivered by adopting fibres in UAV frame materials, which combine increased mechanical strength durability good environmental conditions. Based on test outcomes, (ETI) indicates significant compressive an optimum load-carrying capacity 5.98 kN notable tensile maximum 8.13 MPa, therefore plate can be used rigid or definite-shaped applications due its high resistance deformation. The (ETC) indicated flexibility rate carrying flexural load (0.15 KN), so it dampening cushioning material absorb vibrational energy. These two biodegradable materials possess lower density higher strength-to-weight ratio, are important properties for decreasing power consumption improving UAV's endurance. We investigated chemical morphological characteristics composites using scanning electron microscopy (SEM)... Read More

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Helicoidal composite materials with improved impact resistance and damage tolerance. The materials have a unique layered structure that spirals around the part, rather than being flat. This helical architecture allows for more design freedom and tailoring of the composite properties. The helical layup can be made using thin ply unidirectional (TPUD) fabric, thin ply woven fabric (TPW), or quasi-unidirectional woven fabric (QUDW). The helical layup provides better impact resistance compared to traditional flat layups because it allows for more controlled fiber orientation and delamination prevention.

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An inertial measurement module, shock absorption system, and unmanned aerial vehicle (UAV) with improved accuracy and stability of flight control. The module has a thermally conductive member between the inertial measurement unit and a thermal resistor. This allows heat from the resistor to transfer to the measurement unit without squeezing them together. A counterweight assembly prevents contact between the thermally conductive member and the module housing. This prevents the module from squeezing and reduces stress changes on the measurement unit due to temperature.

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A drone design to improve heat dissipation and impact resistance. The drone has a main body with a fixed bottom fuselage and detachable wings. Inside the fuselage, components like the camera and motors are separated by partitions with heat insulating film to prevent heat transfer between components. A torsion spring connects the fuselage to the main body, allowing it to expand and cushion impacts.

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A drone battery casing made of a lattice structure that provides improved protection and heat dissipation compared to traditional casings. The casing is made of nano-ceramic aluminum alloy and has a periodic lattice structure. It replaces machined casings made of materials like PC or aluminum. The lattice structure enhances stiffness and force resistance while dissipating heat better than solid casings. The lattice casing provides better protection for the drone battery during flight compared to traditional casings.

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An unmanned aerial vehicle (UAV) with a protective outer cage provides high collision resistance while allowing maneuverability and access to inner components. The UAV has an inner frame with flight propulsion, an outer frame connected by a gimbal system, and an actuation system to actively orient the outer frame relative to the inner frame. This allows the outer cage to protect inner components from collisions while still reaping benefits like protection from the outer frame. The actuation can be through outer propellers or electrical actuators on the gimbal connections.

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Full carbon fiber unmanned aerial vehicle body that uses interspersed glue joints between modular sections to create a lightweight, high-strength, and easily assembled body structure. The modular sections are made of carbon fiber composite material to reduce weight compared to metal bodies. The interspersed glue joints involve inserting an interspersed block into a slot on one section and fixing it with high-temperature glue. Then bolts are used for additional fixation. This allows modular sections to be spliced together into a complete body. The modular design enables customization and repairability while the carbon fiber composite material provides lightweight strength.

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A vibration damping structure for unmanned aerial vehicles (UAVs) to improve flight stability and prevent damage to the flight control system from high-frequency vibrations. The damping structure uses multiple layers of shock-absorbing sponges sandwiched between positioning sheets and housings. The sponges are bonded to the flight control components and housings. The sponges are made of materials like viscose and glass fiber to provide anisotropic damping. The housings have positioning bosses and holes to securely mount the damping components. The sponges are positioned between the control components and housings to absorb vibrations in all directions.

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Double monocoque structure for drones that enhances strength and waterproofing while allowing easy exterior customization. The drone has an internal monocoque covering the frame from above and below, with an external monocoque doubling over the internal one. This provides a double-layered monocoque structure around the drone components like wings, legs, and power source. The monocoque construction increases strength and waterproofing compared to just attaching lids to the frame. The double monocoque allows customizable outer shapes by changing the external monocoque design.

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A UAV architecture that provides improved thrust efficiency, mass reduction, protection, and internal cooling for unmanned aerial vehicles (UAVs). The architecture uses a foam-polycarbonate composite airframe with enclosed cores and a central support frame. The foam cores are vacuum formed polycarbonate shells overmolded with expanded polystyrene foam. This provides lightweight, impact-resistant airframe components. The enclosed cores shield internal components from damage. The support frame physically couples the cores and motors. The architecture enables upside-down landing/takeoff, buoyancy, and internal cooling through the foam cores.

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Heat dissipation system for multi-rotor drones that allows customized heat dissipation and protection for different drone models. The system has a detachable heat sink fan mounted on the drone body, with a sliding adjustment rod to raise or lower the fan height. The fan slides in a frame that connects to the drone body. This allows the user to adjust the fan position based on drone size to ensure proper cooling. The system also has a buffer assembly at the drone bottom with a stopper, spring, cushion, and anti-collision pads to absorb impacts and protect the battery. This prevents damage when the drone lands.

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Unmanned aerial vehicle (UAV) with a protective outer cage and a sensor system like a camera. The cage protects the inner components from collisions, but can interfere with sensors and cameras. To solve this, the UAV has a releasable coupling between the sensors and the cage. The coupling is rigid in normal operation, but can release when subjected to a collision force above a threshold. This allows the sensors to be decoupled from the cage upon impact, protecting them from damage.

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Modular multi-rotor drone design that allows quicker repair and continued operation after damage by separating high-voltage components from low-voltage components. The high-voltage components like batteries and motors are located outside the drone body. This protects them from damage during crashes. The low-voltage components like electronics and sensors are inside the body. If a high-voltage component fails, it can be quickly replaced without disassembling the entire drone. This enables faster repairs and allows the drone to be back in service sooner.

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Improving the safety, durability, and modularity of unmanned aerial vehicles (UAVs) that protect the propellers from damage and reduce injury risk in case of impact. The UAV has a protective cage around each propeller that allows airflow through. The propeller assemblies are modular and can release upon impact to minimize damage. The UAV also has modular components like battery packs that can detach on impact.

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