中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页
机构
成果
学者
登录
注册
登陆
×
验证码:
换一张
忘记密码?
记住我
×
校外用户登录
CAS IR Grid
机构
金属研究所 [3]
长春光学精密机械与物... [3]
福建物质结构研究所 [1]
采集方式
OAI收割 [7]
内容类型
期刊论文 [4]
会议论文 [3]
发表日期
2011 [3]
2009 [3]
2008 [1]
学科主题
筛选
浏览/检索结果:
共7条,第1-7条
帮助
条数/页:
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
排序方式:
请选择
题名升序
题名降序
提交时间升序
提交时间降序
作者升序
作者降序
发表日期升序
发表日期降序
Inorganic Supramolecular Compounds with 3-D Chiral Frameworks Show Potential as Both Mid-IR Second-Order Nonlinear Optical and Piezoelectric Materials
期刊论文
OAI收割
Journal of the American Chemical Society, 2011, 卷号: 133, 期号: 10, 页码: 3410-3418
X. M. Jiang
;
M. J. Zhang
;
H. Y. Zeng
;
G. C. Guo
;
J. S. Huang
收藏
  |  
浏览/下载:23/0
  |  
提交时间:2012/06/06
functional perturbation-theory
strong 2nd-harmonic generation
total-energy calculations
ab-initio calculation
crystal-structure
electronic-structure
alpha-quartz
linear-response
ground-state
zintl
phases
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%
A fuzzy control method based on information integration for double inverted pendulum (EI CONFERENCE)
会议论文
OAI收割
2011 2nd International Conference on Digital Manufacturing and Automation, ICDMA 2011, August 5, 2011 - August 7, 2011, Zhangjiajie, Hunan, China
作者:
Fan Y.
收藏
  |  
浏览/下载:61/0
  |  
提交时间:2013/03/25
This article proposes a new fuzzy controller based on information integration. The mathematical model of Linear double inverted pendulum has been studied and estabLished with dynamics analytical method and LQR theory is used to design the optimal Linear inverted pendulum controller
then
the integration technology is used to design the variable parameters self-tuning fuzzy controller. Thereby
the fuzzy controller input variable dimension and the number of fuzzy control rules have been extremely reduced. Two controllers are designed for inverted pendulum system control and the comparison simulation experiments have been done. The results show that the controllers can both reaLize good control
and the fuzzy controller has higher precision
faster response
better stabiLity and robustness. 2011 IEEE.
Space optics remote sensor focusing components mechanics characteristic analysis based on FEM (EI CONFERENCE)
会议论文
OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, June 17, 2009 - June 19, 2009, Beijing, China
作者:
Wang B.
;
Ren J.-Y.
;
Wang B.
收藏
  |  
浏览/下载:159/0
  |  
提交时间:2013/03/25
Space optical remote sensor is very important in many fields of science and military significance. It is widely applied. Space optical remote sensor design and manufacturing require precision and stability. Focusing mechanics is an important component of remote sensors. Focusing mechanics can guarantee the stability of the entire mechanics focusing accuracy
therefore the stability of research focusing mechanics is very important. In order to guarantee the space optics remote sensor focusing mechanics the stability
takes steps the space optics remote sensor focusing organization mechanics characteristic analysis from the classics contact theory. This article uses international general non-linear finite element analysis software ABAQUS to carry on mechanics characteristic analysis to the space optics remote sensor focusing mechanics. First acts according to the focusing mechanics unique feature
carries on the finite element to the structural model the grid division
the material attribute disposition and the boundary condition indeed grades. Then establishment contact non-linear finite element model
and to focusing organization finite element model infliction unit action. Like this contacts the result and the equivalent static analysis result which the nonlinear analysis obtains carries on the contrast and the analysis. This article last count result modality is 90HZ
satisfies the space optics remote sensor structure overall modality to request to be bigger than 50HZ.This article when carries on the dynamic analysis
extracts the structure kinetic energy and the acceleration curve. In the dynamic analysis obtained transient response analysis modality 70.5Hz
this also is bigger than 50HZ. The dynamic analysis indicated the structure dynamic stability has the distinct enhancement
has provided certain foundation for the space optics remote sensor following development work
reduced the overall system development cycle. 2009 SPIE.
Hydrostatic pressure induced structural instability and dielectric property of cubic BaZrO(3)
期刊论文
OAI收割
Journal of Applied Physics, 2009, 卷号: 105, 期号: 4
C. Zhu
;
K. Xia
;
G. R. Qian
;
C. L. Lu
;
W. Z. Luo
;
K. F. Wang
;
J. M. Liu
收藏
  |  
浏览/下载:40/0
  |  
提交时间:2012/04/13
ab initio calculations
antiferroelectricity
barium compounds
ferroelectric transitions
high-pressure solid-state phase
transformations
permittivity
phonon dispersion relations
soft modes
interatomic force-constants
functional perturbation-theory
ab-initio
effective charges
lattice-dynamics
linear-response
barium-titanate
alpha-quartz
1st-principles
Effect of high pressure on the phonon spectra and superconductivity in ZrN and HfN
期刊论文
OAI收割
Superconductor Science & Technology, 2009, 卷号: 22, 期号: 7
E. G. Maksimov
;
S. Q. Wang
;
M. V. Magnitskaya
;
S. V. Ebert
收藏
  |  
浏览/下载:28/0
  |  
提交时间:2012/04/13
transition-metal nitrides
linear-response theory
hydrostatic-pressure
physical-properties
temperature
anomalies
nbc
tin
Effect of high pressure on the electron-phonon interaction and superconductivity in ZrN and HfN
期刊论文
OAI收割
Jetp Letters, 2008, 卷号: 87, 期号: 8, 页码: 437-440
E. G. Maksimov
;
S. Q. Wang
;
M. V. Magnitskaya
;
S. V. Ebert
收藏
  |  
浏览/下载:33/0
  |  
提交时间:2012/04/13
linear-response theory
nbc