Thermoelectric photodetector cooling system for high precision star sensor

In order to meet the high precision calibration requirements of precision angular distance and high magnitude to the optical navigation sensor, A new style of high precision star simulator with large caliber, and long-focus, is presented. And then the main compositions of this simulator are designed in detail referring to the simulator, the steering mirror, the standard simulated targets and so on. According to the simulator characteristics of large size lens and multi lens, the structural of lens cone uses the tube sleeve and inner sleeves fixed together means. To eliminate the mirror deformation, the design plan based on the tiny stress is applied in steering mirror. In order to achieve a high magnitude, the light targets are simulated by optical transmission from OLED to high precision drone with fibers. Its degree ≤1〞,simulated magnitude≥5 that meet calibration requirements of the current high-precision optical navigation sensor.

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High precision automatic measurement for alignment of camera and star-sensor in GF-2

Optics and Precision Engineering ◽

10.3788/ope.20172511.2931 ◽

2017 ◽

Vol 25 (11) ◽

pp. 2931-2938 ◽

Cited By ~ 2

Author(s):

孙刚 SUN Gang ◽

杨再华 YANG Zai-hua ◽

万毕乐 WAN Bi-le ◽

张成立 ZHANG Cheng-li ◽

代卫兵 DAI Wei-bing

Keyword(s):

High Precision ◽

Automatic Measurement ◽

Star Sensor

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The Key Technologies and Advances of Ultra-Precision Single-Plane Polishing and Lapping Devices

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.565.261 ◽

2012 ◽

Vol 565 ◽

pp. 261-266

Author(s):

Qing Jian Li ◽

Cheng Yong Wang ◽

Li Juan Zheng ◽

Yu Jia Wang ◽

Yue Xian Song

Keyword(s):

High Precision ◽

Cooling System ◽

Development Trends ◽

Single Plane ◽

Polishing Pad ◽

Key Technologies ◽

The Future ◽

Ultra Precision ◽

Pressurization System

Some technologies of ultra-precision single-plane polishing and lapping devices, including spindle section, polishing pad, cooling system, dressing system and pressurization system are discussed. The development trends of ultra-precision single-plane polishing and lapping devices are also analyszed as more controllable, integrated and high-precision in the future.

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Precise Attitude Determination of Ship Based on Star Sensor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.380-384.995 ◽

2013 ◽

Vol 380-384 ◽

pp. 995-1002 ◽

Cited By ~ 2

Author(s):

Bing Liu ◽

Feng Chen ◽

Tong Shuang Zhang ◽

Dean Zhong ◽

Lei Yang ◽

...

Keyword(s):

Engineering Design ◽

High Precision ◽

Attitude Determination ◽

Measured Data ◽

Star Sensor ◽

Single Star

This paper analyses the attitude measured model and presents the attitude determination algorithm of space TT&C ship (space tracking, telemetry, and command ship) based on single star sensor. Considering lower precision of rolling angel for single star sensor, we proposed an algorithm by integrating attitude determination and redundancy measure to obtain high precision ship attitude data. Aiming at the circumstance of space TT&C ship, the factors that influence the precision of attitude measured data such as the number of star, atmosphere refraction correct and installation elevation are analyzed, which this can provide valuable references to the engineering design for star sensor used on space TT&C ship.

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Influence of mechanical ventilation and cooling systems on vibrations of high precision machines

E3S Web of Conferences ◽

10.1051/e3sconf/201910000080 ◽

2019 ◽

Vol 100 ◽

pp. 00080

Author(s):

Lukasz Scislo ◽

Nina Szczepanik-Scislo

Keyword(s):

High Precision ◽

Vibration Isolation ◽

Dynamic Behaviour ◽

Linear Collider ◽

Cooling System ◽

High Amplitude ◽

Water Cooling ◽

Cooling Systems ◽

Beam Stability ◽

Precision Machines

The aim of the research was to describe the effects that air and water cooling systems can have on the dynamic behaviour of precise machines. Although much thought is paid to vibration isolation of the ground and isolation of individual effects of machines operating close to each other, it is often forgotten to model or to measure the effects that the ventilation or the machines cooling systems have on the machine itself. This can be especially important for high precision machines used for experimental research and medical equipment. The article shows the effects of ventilation and cooling system on the induction of additional resonant frequencies of the system for the high precision machine like a linear collider. This kind of machine requires special environmental conditions to assure proper beam stability. Due to the dynamic behaviour of typical machines, the presence of the new high amplitude frequencies in the 0-100 Hz range is very dangerous for its stability of work. In the case of high precision machines, it is not only a cause of not optimal working conditions but very often is a cause of serious problems.

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