Compensation Method of Dynamic Angle Measurement for Missile-Borne Star Sensor

2021 ◽  
pp. 4363-4372
Author(s):  
Bin Wu ◽  
ZhenXi Guo ◽  
Denggao Ji ◽  
Fang Chen ◽  
Quanjun Liu
Keyword(s):  
Angle Measurement ◽  
Compensation Method ◽  
Star Sensor ◽  
Dynamic Angle

Establishment of the Precision of a Rapid-Angle Measurement Device for Superpave Gyratory Compactors

2005 ◽  
Vol 1929 (1) ◽  
pp. 97-103
Author(s):  
Kevin D. Hall ◽  
Tamara Easley
Keyword(s):  
Hot Mix Asphalt ◽  
Angle Measurement ◽  
Study Data ◽  
Interlaboratory Study ◽  
Measurement Device ◽  
Superpave Gyratory Compactor ◽  
Internal Angle ◽  
Dynamic Angle

Superpave® hot-mix asphalt (HMA) specimens are compacted in the laboratory with the Superpave gyratory compactor (SGC) through pressure and an applied angle of gyration. The original compaction specification for the SGC requires the angle of gyration to be 22 ± 0.35 mrad (1.25 ± 0.02 degrees), measured externally to the compaction mold. Questions concerning the ability of different compactors to produce HMA specimens of the same mix with the same density led to the development of the dynamic angle validation (DAV) kit, which measures the angle of gyration internally (on the inside of the mold). The DAV procedure requires the use of HMA to measure the internal angle of gyration. Because of practical limitations of performing measurements with HMA and questions concerning the “proper” HMA mix to use in the measurements, a device–-the rapid-angle measurement (RAM)–-was introduced to simulate effectively the load placed on the SGC by an HMA specimen. An interlaboratory study was conducted in accordance with ASTM E691-99 to establish the precision of the internal angle measurement provided by the RAM. A total of 11 RAM units and five SGC models were included in the study. On the basis of the study data, estimates were developed of both repeatability (within lab) and reproducibility (between lab) for the RAM device for all five SGC models. It is recommended that all devices with the reported ability to measure internal angle of gyration be subjected to a similar interlaboratory study to compare devices on an equal basis.

The Design about Aiming at Amount of Change from Baseline Detector with Characteristics of High-Resolution

2012 ◽  
Vol 249-250 ◽  
pp. 218-225
Author(s):  
Jin Song Wang ◽  
Yu Chen Zhao ◽  
Zhi Yong An
Keyword(s):  
Measurement Error ◽  
High Resolution ◽  
Flat Glass ◽  
Angle Measurement ◽  
Compensation Method ◽  
Experimental Results

In order to measure to the aiming at amount of changes from baseline, we designed a detector with characteristics of high-resolution. The apparatus takes with the combination of flat glass-based compensation method and reading such sine mechanism on the zero subdivision institutions, to achieve the angle measurement in way of high-resolution and outside reading. By using 0.2″theodolite as the basic instrument for verification of measurement, experimental results show that resolution of the instrument to achieve 2.16″, the measurement error less than 10.8″.

scholarly journals Self-compensation method for dual-beam roll angle measurement of linear stages

2021 ◽  
Author(s):  
Yuchao Fan ◽  
Zhifeng Lou ◽  
Yubin Huang ◽  
Kuang-Chao Fan
Keyword(s):  
Angle Measurement ◽  
Compensation Method ◽  
Roll Angle ◽  
Dual Beam

Scale factor calibration and dynamic angle measurement method based on self-collimator and fiber optic gyroscope

2019 ◽  
Vol 52 ◽  
pp. 101945 ◽  
Author(s):  
Jiapeng Mou ◽  
Tengchao Huang ◽  
Guangyao Ying ◽  
Shuangliang Che ◽  
Xiaowu Shu
Keyword(s):  
Measurement Method ◽  
Fiber Optic ◽  
Angle Measurement ◽  
Scale Factor ◽  
Fiber Optic Gyroscope ◽  
Dynamic Angle

Design and Experimental Research on Isolation Mechanism for Opto-Electronic Platform in Moving Carries

2012 ◽  
Vol 229-231 ◽  
pp. 2531-2535
Author(s):  
Zhong Bo He ◽  
Jin Hui Zhao ◽  
Yu Long Li ◽  
Hong Bai Bai ◽  
Shuai Tao
Keyword(s):  
Angle Measurement ◽  
Rotational Displacement ◽  
Imaging Quality ◽  
Linear Ccd ◽  
Angle Measuring ◽  
Imaging Experiment ◽  
Metal Rubber ◽  
New Type ◽  
Novel Design ◽  
Dynamic Angle

Vibration can influence the imaging quality and tracking precision of the moving opto-electronic platform seriously, some measures of reducing vibration must be taken into consideration. In this paper the influence which vibration works on the imaging quality is analyzed, a novel design scheme of the damping mechanism is proposed, two new type Metal Rubber Isolators are designed, and two dimensional dynamic angle measuring instrument using linear CCD is applied to measure the dynamic rotational displacement of the opto-electronic platform. The result of vibration sweeping experiment shows that the isolator mechanism can reduce the three axis’ vibration higher than 25Hz. The angle-measurement result presents that the maximum rotational displacement is , which is suited to the demands of the imaging experiment.

Sign in / Sign up

Export Citation Format

Share Document