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Connector exploration in UAV Applications

    UAVs increasingly important for national defense, unmanned aerial vehicles are exposed to much worse environment, and therefore require more stringent use of the components required to meet the needs of a large number of special connectors.booster cables This article describes the UAV performance requirements of the connector, the connector described in the application of UAV use the distribution and main types: small round connector, micro / nano small rectangular connector,battery clip a small high-density fiber optic connectors the composite light connector.

    Connector is in the aviation, aerospace and other military applications almost everywhere in the important basic components, and aircraft (aircraft),tow rope and avionics systems for military connectors are the largest and most concentrated areas of application, ratchet tie dowm the connector in the aircraft and avionics systems transmit signals or transmit power play interconnection role. UAV (UnmannedVehicles, UV) as in intelligence surveillance, target acquisition, target attack, and other areas becoming more prominent, more and more important for the defense, it is becoming a military power to develop the weapons and equipment. Compared with manned aircraft, high intelligence, technology is more complex, the work environment even worse, so the components including connectors, including the proposed more stringent requirements.

    UAV brief.

    Unmanned aerial vehicles, in the broad sense, including all modes of transport, armed aircraft, and even underwater tools, robots and other unexploded ordnance handling. Commonly referred to as UAV, is the narrow sense of unmanned aircraft (UnmannedAerialVehicles, UAV), this paper focuses on the latter. UAVs in military arsenals in the development of an active, defense-related now account for 80% of military aviation activities. And compared to traditional manned aircraft, unmanned aerial vehicles has irreplaceable advantages: the ability to be extremely threatened areas in the mission, travel farther, more sustainability and because no pilot support system, the body decreases, no machine manufacturing and deployment costs are significantly reduced. Military UAV main function is reconnaissance, surveillance and target capture, followed by interference and attacks. UAV known as "Global Hawk", "Predator," "Fire Scout", X-45 and X-47; "shadow", "Search Eagle" and so on.

    UAVs must meet more rigorous electrical, mechanical and environmental performance requirements, so the wiring and cabling for EMI, vibration and shock, temperature cycling, anti-liquid properties, corrosion of contacts in the micro-vibration, and other life and reliability requirements, it must live at the corps level to meet performance benchmarks.

    Although the UAV and manned many of the same performance requirements, but the composition of the UAV platform for the interconnection wiring connector, the back cover, cable and line protection with additional requirements. Reduce the quality, size, resistance to shock and vibration, electromagnetic compatibility, corrosion and high-speed / bandwidth data processing is the interconnection cabling UAV key design requirements, which extends from the UAV itself, to include ground control / support system the use of electronic equipment and electronic devices UAV payload.
    UAV connector performance requirements.

    UAV designers in assessing the long-term total cost of the user and the application of environmental requirements, must provide high-performance interconnect technology, such as MIL-DTL-38999 (resistant to high-density environment for the rapid separation of small round connector), MIL-C -26,482 (resistant environment for the rapid separation of highly reliable circular connectors) or other military grade connectors. These high performance connectors for UAV designers to achieve the following objectives: to improve working life, reducing installation and maintenance costs, reduce testing and appraisal costs, improve reliability and safety.

    As the scope and duration of activities UAV navigation capability is the key factor, and in fact, "Artificial - portable" tactical UAV setting is very important, so the UAV system designers must also minimize interconnect components the quality and size to the payload for the UAV technology, communications, flight control and propulsion systems to release space. Whether big or small UAV, born on the size and quality-sensitive, which makes interconnect technology throughout the design process conditions to become a key element.

    Land-based or sea-based unmanned aerial vehicle requirements facing the system are mostly the same: to improve working life and reliability, but also experience the unique environmental challenges and connector packaging issues, such as fast - lock and on-site cleaning ability and chemical resistance . In addition, as space-based unmanned aerial vehicles, ground-based or sea-based unmanned aircraft system can reduce the size and quality to get great benefits.

    UAVs in military grade must meet the more important performance benchmark for interconnection as described below.

    Machinery / materials package performance.

    * Weapon Impact: 300g;

    * Vibration :20-30g;

    * Temperature shock: meet the EIA-364-32;

    * Operating temperature range: -55 ~ +150 ° C;

    * Moisture (condensation);

    * Key lock;

    High-performance contacts;

    Support for 22 to 28 signal lines;

    Support for power supply / battery system to the 12 wires.

    Electrical performance.

    · 500VDC;

    * Minimum 3A current (continuous rating), the power contacts up to 23A;

    * Shell - shell resistance is low;

    * Shield / ground;

    * Compatible with balanced impedance / high-speed signal;

    ? In 1MHz, EMI shielding effectiveness of 65dB.

    Resistance to environmental performance (on-site and human portable systems)

    * Meet the MIL-STD-810F;

    * Life ≥ 1000 times mating cycles;

    * Field can be clean;

    * Chemical resistance;

    * Immersion: 1m, 1hour.

    Connector in the UAV application.

    Application distribution.

    Connector military UAV applications typical electronic system, including: engine control, and sensors, landing / docking systems, flight control, fuel cell sensors, data processing and navigation, and payload technologies, such as high-resolution infrared camera systems, high-speed image processing dedicated secure data communications, electronics, targets and fire control (weapons) systems, mine detection, sonar, radar or radio devices, Figure 2 shows the use of UAV subsystems interconnect components and electronic load devices.

    These electronic systems are typically configured military standard socket connector, easy to mount within the UAV. UAV provides high performance using a variety of rectangular and circular structure of the connector, such as MIL-DTL-38999 Series III, MIL-DTL-83513 (Mini D-shaped) and other military grade connectors. UAV system engineers to improve the wiring system interconnects the key characteristics and / or reduce the size and quality is one of the best opportunities to change the UAV on the "black box" payload and other electronic devices on the technical conditions of the connector. Choose the correct connector on the black box allows engineers to reduce the size and quality as stipulated in the cable harness to connect to the UAV subsystems, which makes unmanned aircraft had the performance and size / quality requirements.

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