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首页> 外文会议>Free-space laser communication technologies XXIII >High-performance Two-axis Gimbal System for Free Space Laser Communications Onboard Unmanned Aircraft Systems
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High-performance Two-axis Gimbal System for Free Space Laser Communications Onboard Unmanned Aircraft Systems

机译：高性能两轴云台系统，用于自由空间激光通信机载无人机系统

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摘要

A custom designed and manufactured gimbal with a wide field-of-view and fast response time is developed. This enhanced custom design is a 24 volt system with integrated motor controllers and drivers which offers a full 180° field-of-view in both azimuth and elevation; this provides a more continuous tracking capability as well as increased velocities of up to 479° per second. The addition of active high-frequency vibration control, to complement the passive vibration isolation system, is also in development.rnThe ultimate goal of this research is to achieve affordable, reliable, and secure air-to-air laser communications between two separate remotely piloted aircraft. As a proof-of-concept, the practical implementation of an air-to-ground laser-based video communications payload system flown by a small Unmanned Aerial Vehicle (UAV) will be demonstrated.rnA numerical tracking algorithm has been written, tested, and used to aim the airborne laser transmitter at a stationary ground-based receiver with known GPS coordinates; however, further refinement of the tracking capabilities is dependent on an improved gimbal design for precision pointing of the airborne laser transmitter.rnThe current gimbal pointing system is a two-axis, commercial-off-the-shelf component, which is limited in both range and velocity. The current design is capable of 360° of pan and 78° of tilt at a velocity of 60° per second. The control algorithm used for aiming the gimbal is executed on a PC-104 format embedded computer onboard the payload to accurately track a stationary ground-based receiver. This algorithm autonomously calculates a line-of-sight vector in real-time by using the UAV autopilot's Differential Global Positioning System (DGPS) which provides latitude, longitude, and altitude and Inertial Measurement Unit (IMU) which provides the roll, pitch, and yaw data, along with the known Global Positioning System (GPS) location of the ground-based photodiode array receiver.
机译：开发了定制的设计和制造的万向节，其具有广阔的视野和快速的响应时间。这种增强的定制设计是一个24伏系统，带有集成的电动机控制器和驱动器，可在方位角和仰角上提供完整的180°视野；这提供了更连续的跟踪能力，并提高了高达每秒479°的速度。有源高频振动控制的补充，也正在开发中，以补充无源振动隔离系统。这项研究的最终目标是在两个独立的遥控飞行员之间实现负担得起，可靠且安全的空对空激光通信飞机。作为概念验证，将演示由小型无人机（UAV）驾驶的空对地基于激光的视频通信有效载荷系统的实际实现。已经编写，测试和计算了数值跟踪算法。用于将机载激光发射器对准具有已知GPS坐标的固定地面接收器；但是，跟踪能力的进一步完善取决于改进的机载万向支架设计，以精确控制机载激光发射器。rn当前的万向支架系统是现成的两轴商用组件，在两个范围内都受到限制和速度。当前的设计能够以每秒60°的速度旋转360°并倾斜78°。用于瞄准云台的控制算法在有效载荷上的PC-104格式嵌入式计算机上执行，以准确跟踪固定的地面接收器。该算法通过使用无人机自动驾驶仪的差分全球定位系统（DGPS）（可提供纬度，经度和高度）以及惯性测量单位（IMU）来实时计算视线矢量，惯性测量单位可提供侧倾，俯仰和偏航数据，以及基于地面的光电二极管阵列接收器的已知全球定位系统（GPS）位置。

著录项

  • 来源
    《Free-space laser communication technologies XXIII》|2011年|p.79230M.1-79230M.8|共8页
  • 会议地点 San Francisco CA(US)
  • 作者

    Michael Locke; Mariusz Czarnomski; Ashraf Qadir; Brock Setness; Nicolai Baer; Jennifer Meyer; William H. Semke;

  • 作者单位

    Unmanned Aircraft Systems Engineering Laboratory University of North Dakota Grand Forks, North Dakota, 58202, USA;

    Unmanned Aircraft Systems Engineering Laboratory University of North Dakota Grand Forks, North Dakota, 58202, USA;

    Unmanned Aircraft Systems Engineering Laboratory University of North Dakota Grand Forks, North Dakota, 58202, USA;

    Unmanned Aircraft Systems Engineering Laboratory University of North Dakota Grand Forks, North Dakota, 58202, USA;

    Unmanned Aircraft Systems Engineering Laboratory University of North Dakota Grand Forks, North Dakota, 58202, USA;

    Unmanned Aircraft Systems Engineering Laboratory University of North Dakota Grand Forks, North Dakota, 58202, USA;

    Unmanned Aircraft Systems Engineering Laboratory University of North Dakota Grand Forks, North Dakota, 58202, USA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光波通信、激光通信;
  • 关键词

    Gimbal, GPS; IMU; laser communications; payload; tracking algorithm; UAS, UAV;

    机译：云台，GPS; IMU；激光通讯；有效载荷跟踪算法；那，无人机;

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