中国科学院机构知识库网格系统: 检索

Calculation of Magnetostriction Coefficient for Laser-Scribed Grain-Oriented Silicon Steel Based on Magnetic Domain Interaction 期刊论文 OAI收割
ACTA METALLURGICA SINICA, 2019, 卷号: 55, 期号: 3, 页码: 362-368
作者: Chu Shuangjie; Yang Yongjie; He Zhenghua; Sha Yuhui; Zuo Liang

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收藏 | 浏览/下载：37/0 | 提交时间：2021/02/02

magnetostriction magnetic domain grain-oriented silicon steel laser scribing orientation deviation angle

Calculation of Magnetostriction Coefficient for Laser-Scribed Grain-Oriented Silicon Steel Based on Magnetic Domain Interaction 期刊论文 OAI收割
ACTA METALLURGICA SINICA, 2019, 卷号: 55, 期号: 3, 页码: 362-368
作者: Chu Shuangjie; Yang Yongjie; He Zhenghua; Sha Yuhui; Zuo Liang

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收藏 | 浏览/下载：22/0 | 提交时间：2021/02/02

magnetostriction magnetic domain grain-oriented silicon steel laser scribing orientation deviation angle

Improved measurement of beacon light angle deviation based on a quadrant detector 会议论文 OAI收割
Beijing, China, July 7, 2019 - July 9, 2019
作者: Li, Qing; Xu, Shaoxiong; Peng, Zhenming; Huang, Yongmei

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收藏 | 浏览/下载：25/0 | 提交时间：2021/05/06

Free space optical communication Quadrant detector Beacon angle deviation Fourier Transform

Correlation Between Grain Deviation Angles and the Partial Ordering Transformation of Grain Line in Bi4Si3O12 Micro-crystals 期刊论文 OAI收割
SCIENCE OF SINTERING, 2012, 卷号: 44, 页码: 257-264
作者: Zhang, Z. G.; Jiang, Z. Y.; Wang, X. F.; Tian, Q. Q.

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收藏 | 浏览/下载：12/0 | 提交时间：2018/07/05

Bi4si3o12 Grain Line Grain Deviation Angle Correlation Partial Ordering Transformation

The aircraft autopilot design of parameters changing in a wide range (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Zhen D.; Yue Z.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

Autopilot is an important part of aircraft Under the action of the disturbance torque for the flight parameters of aircraft Changing in a wide range the range was about 16km on the basic of analyzing the typical trajectory the max height was about 5100m the trajectory of feature points were selected the deviation of lateral was about 12m taking pitch control loop for example the maximum angle of attack was about 3.6 a sub- PID autopilot was designed using classical control theory the maximum elevator deflection was less than 5 using single-mode Transient suppression method the maximum aileron deflection was less than 2 the overload due to control surface transition deflection was avoided when control parameters changing the maximum roll was less than 5 the verification was done by non-linear simulation. The result showed that: the phase margin of autopilot was greater than 30 the response of overload can accurately track the given overload instruction. An autopilot design method of aircraft of parameter changes in a wide range was provided. 2011 IEEE. the bandwidth was more than 14rad / s the settling time was less than 0.7s the maximum overshoot was 23.3%

Non-linear compensation algorithm of LOS locating in aerial remote sensor (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
作者: Li J.; Li Y.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

A non-linear light-of-sight(LOS) locating compensation algorithm for certain aerial remote sensor is presented in this paper. The LOS locating system is composed of two main components which are an inertial reference frame to provide coarse LOS locating and a 2-axis Fast Steering Mirror to remove the frame's residual error. The azimuth and elevation of LOS are both affected by the FSM two-degree-of-freedom rotation which should be dealt with to raise the accuracy of LOS location. This paper extrapolates LOS locating algorithm of FSM by coordinate transformation and gives corresponding deviation analysis for different LOS poiting angles. It is found that the angle deviation grows rapidly with range of FSM's travel enlarging so the deviation must be eliminated. Through the data analysis for deviation a non-linear compensation algorithm is proved effective to reduce the error of LOS significantly. Taking LOS changing in [-3 deg 3 deg] as an example two analytic expressions are given and the LOS locating accuracy rises by 34 times compared with non-linear compensation unused and the cross coupling of LOS loating is 0.08%. 2011 IEEE.

Modeling of satellite borne TDI CCD pitching imaging image motion velocity vector (EI CONFERENCE) 会议论文 OAI收割
2009 IEEE International Conference on Automation and Logistics, ICAL 2009, August 5, 2009 - August 7, 2009, Shenyang, China
作者: Zhang L.; Li S.; Zhang L.

收藏 | 浏览/下载：14/0 | 提交时间：2013/03/25

In order to obtain three-dimensional observation effect with single satellite borne time delay and integrate charge coupled device (TDI-CCD) pitching imaging is required. More accurate real-time image motion velocity vector computational model of space camera is also necessary to make the imaging perfect. Imaging motion velocity vector computation model must be set up on image plane at pitching imaging. According to the geometric relationship between the pitching imaging space camera and the Earth's rotation motion satellite borne TDI CCD pitching imaging motion velocity vector model is derived by mapping the ground speed to the image plane and using coordinate transformation method. The numerical simulation results show that the image velocity model can reduce deviation angle error about 33' and about 30% image motion speed error compared to traditional ground velocity model. 2009 IEEE.

Error analysis and test study of fiber optic gyroscope north-finder (EI CONFERENCE) 会议论文 OAI收割
Advanced Sensor Systems and Applications II, November 8, 2004 - November 12, 2004, Beijing, China
Zhang Z.; Sun J.; Wu K.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

North-finder system is an important application of the inertial technology. It provides true north azimuth information to f all kinds of ground-based equipment. This paper designed a dynamic automatic north-finder based on the modulation output of fiber optic gyroscope (FOG). In this scheme the sine output signal of the FOG was sampled and disposed and then the real north of surveyed point on the surface of earth was calculated. The deviation caused by the base tilt was compensated by an accelerator. The output signals of FOG and accelerator were computed combined with the position sampled from increasing encoder by digital signal processor. Successive rotating technique was adopted to modulate the FOG signal periodically. Most of the low frequency part of random gyro drift errors was compensated. The north-finder accuracy was improved compared with the traditional static measuring method. The test result shows the FOG automatic north-finder obtains 2' true north angle accuracies within not more than three minutes can meet the orientation need of artillery terrain measurement vehicle armored car unmanned drive vehicle geodetic survey and tunnel exploration.

Small angle X-ray scattering study of microstructure changes of organic hydrogels from supercritical carbon dioxide drying 期刊论文 OAI收割
JOURNAL OF SUPERCRITICAL FLUIDS, 2004, 卷号: 28, 期号: 2-3, 页码: #REF!
作者: Zhang, R; Xu, Y; Meng, QH; Zhan, L; Li, KX

收藏 | 浏览/下载：17/0 | 提交时间：2016/04/12

organic aerogels supercritical carbon dioxide drying small angle X-ray scattering positive deviation from Porod's law

Positive deviation from debye's theory in small-angle x-ray scattering 期刊论文 iSwitch采集
Chinese physics, 2003, 卷号: 12, 期号: 2, 页码: 208-210
作者: Li, ZH; Gong, YJ; Wu, D; Sun, YH; Zhao, H

收藏 | 浏览/下载：18/0 | 提交时间：2019/04/23

Small-angle x-ray scattering Positive deviation from debye's theory Porous zro2 xerogel