Research on six-degree-of-freedom calibration system for wind tunnel balances with a collimated lase

来源 :ChineseOpticsLetters | 被引量 : 0次 | 上传用户:yuji712
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A newly-developed six-degree-of-freedom calibration system for the wind tunnel balances is introduced. The frame of the system, the functions and the operating principle of different parts are presented in detail. The system is composed of four parts: the automatically loading subsystem, the automatically resetting subsystem, the data-acquisition subsystem and the measurement subsystem. The results of some cell experiments proved that the system can meet the needs of the present calibration task of the balance. Through further improvement, the system can be also used to calibrate other devices with multi degree-of-freedom and measure the minute shifts, such as the guide rail of machine tool and the assembling of large parts and so on.
其他文献
通过在压电陶瓷上加不同扫描速度的三角波电压,对光学参变振荡腔进行腔长扫描,发现内腔非线性晶体的热效应会严重影响共振峰值功率,从而可能用以建立光学参变振荡腔频率的热自锁定.对热效应进行了细致的实验观察并对实验现象作了合理的分析.
用亚甲基蓝作为敏化剂实现了重铬酸盐明胶的红光增感,描述了敏化明胶板的制备、处理的实验方法,用He-Ne激光器的红光拍摄了全息光栅,获得了84%的衍射效率,并制作了可用台灯再现的李普曼全息图。
期刊
Electron leakage still needs to be solved for InGaN-based blue-violet laser diodes (LDs), despite the presence of the electron blocking layer (EBL). To reduce further electron leakage, a new structure of InGaN-based LDs with an InGaN interlayer between th
The result of experimental investigation of continuous-wave (CW) diode-pumped microchip and mini lasers with an intracavity Raman conversion in a set of crystals is presented. Self-frequency Raman conversion effect in Nd:KGW, Yb:KYW, Nd:YVO4, and Nd:BaWO4
In biomedical research fields, the in vivo flow cytometry (IVFC) is a widely used technology which is able to monitor target cells dynamically in living animals. Although the setup of IVFC system has been well established, baseline drift is still a challe
In this paper, we reported both the experimental demonstration and theoretical analysis of a Raman fiber laser based on a master oscillator–power amplifier configuration. The Raman fiber laser adopted the dual-wavelength bidirectional pumping configuratio
近年来,石墨烯(GN)由于具有非凡的物理和化学性质而受到广泛关注,这为分析化学的发展带来了新的活力。电化学器件与GN的耦合提供了一个很好的平台,来实现对许多生物材料的诊断和检测。我们小组首次报道,利用石墨烯电极电化学自发检测存在于ssDNA和dsDNA的所有4个DNA碱基,该检测是在生理pH条件下,并且不需要预水解步骤。我们研究证明了利用独特的GO/适配体相互作用和特异性核酸适体目标识别,GO/适配子系统可以程序化地完成较复杂的OR and INHIBIT逻辑门。在不同输入相同波长的不同荧光强度下,进行多
通过分布反馈和外腔的联合运转,获得了独立调谐的双波长激光,并研究了两个振荡的模式竞争与相对起振时间的关系.
期刊
四旋翼飞行器在受到风力等大扰动的情况下,单纯的PID控制受到积分环节和饱和限幅环节的共同作用,容易产生windup现象,系统动态响应变差,造成飞行器大超调甚至失调。通过建立四旋翼飞行器的动力学仿真模型,分析了windup现象产生的原因,设计了参数模糊可变的anti-windup PID控制器,用于缓解windup现象。对比分析了该控制器与现有的模糊PID控制器、参数为定值的anti-windup PID控制器的性能,仿真结果表明,基于anti-windup技术的模糊PID控制器,能够更加有效地抑制wind
期刊
为实现小口径双非球面硫系玻璃镜片的高精度批量制造, 通过仿真与实验, 对镜片模压成型冷却阶段的冷却间隙进行了研究, 揭示了其对镜片成型质量的影响规律。首先, 对硫系玻璃模压成型的高温粘弹性力学模型、结构松弛模型以及界面热传递模型进行了分析, 并将其应用于仿真研究; 其次, 对目标镜片进行了模压成型仿真, 探讨了冷却间隙条件对镜片内部温度、应力分布以及轮廓偏移量的影响; 最后, 进行了与仿真研究相对应的模压成型实验, 分析了冷却间隙条件对成型镜片表面形状精度PV、表面粗糙度Ra及轮廓偏移量的影响, 并将仿真