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首页> 外文会议>Free-space laser communication and atmospheric propagation XXIX >Design of a Stabilized, Compact Gimbal for Space-Based Free Space Optical Communications (FSOC)
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Design of a Stabilized, Compact Gimbal for Space-Based Free Space Optical Communications (FSOC)

机译：天基自由空间光通信（FSOC）稳定，紧凑型云台的设计

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摘要

Data transmits via optical communications through fibers at 10's of Terabits per second. Given the recent rapid explosion for bandwidth and competing demand for radio frequency (RF) spectrum allocations among differing interests, the need for space-based free space optical communications (FSOC) systems is ever increasing. FSOC systems offer advantages of higher data rates, smaller size and weight, narrower beam divergence, and lower power than RF systems. Lightweight, small form factor, and high performance two-axis gimbals are of strong interest for satellite FSOC applications. Small gimbal and optical terminal designs are important for widespread implementation of optical communications systems; in particular, for satellite-to-satellite crosslinks where the advantages of more secure communications links (Lower Probability of Intercept (LPI)/Lower Probability of Detect (LPD)) are very important. We developed design concepts for a small gimbal focusing on the use of commercial off-the-shelf (COTS) subsystems to establish their feasible implementation against the pointing stabilization, size, weight and power (SWaP), and performance challenges. The design drivers for the gimbal were weight, the elevation and azimuth field of regards, the form factor envelope (1U CubeSats), 100 μrad pointing accuracy, and 10 degrees per second slew capability. Innovations required in this development included a continuous fiber passed through an Azimuth Fiber Wrap and Elevation Fiber Wrap, overcoming typical mechanical and stress related limitations encountered with fiber optic cable wraps. In this presentation, we describe the configuration trades and design of such a gimbal.
机译：数据通过光纤以每秒10兆兆位的速率通过光纤进行传输。鉴于最近带宽的飞速增长以及不同利益方之间对射频（RF）频谱分配的竞争需求，对空基自由空间光通信（FSOC）系统的需求日益增长。与RF系统相比，FSOC系统具有更高的数据速率，更小的尺寸和重量，更窄的光束发散以及更低的功率等优点。轻巧，小巧的外形和高性能的两轴万向节对于卫星FSOC应用非常感兴趣。小型万向架和光终端设计对于光通信系统的广泛实施至关重要。特别是对于卫星到卫星的交叉链路，其中更安全的通信链路（侦听概率较低（LPI）/侦听概率较低（LPD））的优点非常重要。我们针对小型万向节开发了设计概念，着重于使用商用现货（COTS）子系统来建立针对点稳定性，尺寸，重量和功率（SWaP）以及性能挑战的可行实施方案。云台的设计驱动因素是重量，仰角和方位角视场，外形包络（1U CubeSats），100μrad的指向精度以及每秒10度的回转能力。此开发中需要的创新包括连续纤维穿过方位角光纤绕线和高程光纤绕线，从而克服了光缆绕线所遇到的典型的机械和应力相关限制。在本演示中，我们描述了这种云台的配置和设计。

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