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本文介绍了一种新型临近空间低速飞行器风速测量装置。风速仪基于旋转测压旋杆、增加测压旋杆两端测压探头动压的原理设计,在临近空间环境和超低动压条件下具有较高的风速测量精度。在中国电子科技集团公司第二十一研究所的临近空间环境模拟风洞中开展了低温低压低风速测量标定试验,试验来流速度范围为5~14m/s。试验结果表明,测量的动压信号与正/余弦函数拟合结果一致性较高,压差测量值的相对量可信度较高。此外,压差幅值信号与来流风速成线性关系,通过线性拟合的方法获得风速仪的测量标定模型。
This paper introduces a new type of wind speed measuring device for near-space low-speed aircraft. Anemometer is based on the principle of rotating the piezometric rotary rod and increasing the dynamic pressure of the piezometric probe at both ends of the piezometric rotary rod. The anemometer has higher wind speed measurement accuracy under the conditions of near space environment and ultra-low dynamic pressure. A low temperature, low pressure and low wind speed measurement and calibration test was carried out in the simulated wind tunnel near the space environment of the 21st Institute of China Electronics Technology Corporation. The test flow velocity range is 5 ~ 14m / s. The experimental results show that the measured dynamic pressure signal is highly consistent with the positive / cosine function fitting result, and the relative amount of the differential pressure measurement has high credibility. In addition, the differential pressure amplitude signal is linear with the incoming flow velocity, and the anemometer calibration model is obtained by linear fitting.