摘要:
针对微波试验用某型飞艇升空平台开展试验环境测试研究,给出了中等气象条件下的测试结果.指出定姿飞控模式下的艇体方位角稳定性优于压航迹模式,两种飞控模式下艇体俯仰角和滚转角稳定性相近;统计分析指出配试用艇载二轴天线稳定平台可有效隔离飞行中艇体三姿±10°以上的晃动,将接收天线主轴稳定指向辐射源,天线主轴方位、俯仰角控制精度优于±1°.研究了相对辐射源20～40 km,迎头、横向两种航线下,艇载4.5°波束宽度天线接收信号的幅度,统计分析指出迎头飞行时天线增益损失小于1 dB,信号稳定性优于±1 dB,横向飞行时天线增益损失约2.3 dB,信号稳定性约±3 dB.研究给出了飞行条件下艇体散射环境和地面散射环境对艇载天线接收信号幅度的影响.
Abstract:
This article presents a measurement on the testing environment of an airship lifting platform in real test range scene and moderate weather condition.The results show that the heading azimuth of the airship is more stable under fixed orienta-tion flying mode than under fixed flight path mode,while the elevation and rolling angular stabilities under the two flying modes are almost undistinguishable.Statistical analysis proves that the equipped antenna stabilizing platform can isolate the carrier's an-gular shake as high as ±10°and continuously control the antenna beam axis to aim at the ground target with error within ±1°. The 20-40 km distance tests show that the airship carried receiving antenna with 4.5°beam width suffered a 1 dB gain loss and ± 1 dB signal level fluctuation under head-on flying path,while the results degenerate to 2.3 dB gain loss and ±3 dB signal level fluctuation in lateral flying path.The article also presents some testing results about the airship lifting platform's EM scattering environment rooting from its metal structure as well as the test range's rough ground.
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