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长春光学精密机械与... [14]
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会议论文 [14]
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内容类型:会议论文
专题:长春光学精密机械与物理研究所
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Structural design and simulation analysis of ejector used in automotive power steering oil discharge equipment (EI CONFERENCE)
会议论文
2012 International Conference on Mechanical Engineering, Materials Science and Civil Engineering, ICMEMSCE 2012, August 18, 2012 - August 20, 2012, Harbin, China
Cheng K.
;
Zou H.
;
Kong X.
;
Tang J.
收藏
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浏览/下载:17/0
  |  
提交时间:2013/03/25
The structure of ejector used in automotive power steering oil discharge equipment is designed in accordance with the theory of gas-liquid ejector.The two important parameters of the ejector are elected respectively to five values and then 25 ejector models are obtained by the permutations and combinations.The ejector's CFD model is created by Fluent module of Ansys
then it is divided into a grid and analyzed. Analyse its pressure distribution and velocity vector
which provides the optimal size for the manufacture of the ejectors and a theoretical basis for experiment. (2013) Trans Tech Publications
Switzerland.
Research on satellite platform vibration compensation method based on liquid crystal steering system (EI CONFERENCE)
会议论文
2011 SSITE International Conference on Future Material Research and Industry Application, FMRIA 2011, December 1, 2011 - December 2, 2011, Macau, China
Li X.
;
Han C.
;
Wen M.
;
Zhao Q.
;
Jiang X.
收藏
  |  
浏览/下载:10/0
  |  
提交时间:2013/03/25
This paper presents the disturbance compensation scheme based on liquid crystal steering system according to the problem that satellite platform vibration affects the tracking and pointing accuracy in space optical communication. The mathematical model of liquid crystal steering system is built. For improving convergence speed
the adaptive controller based on posteriori estimation errors RLS lattice filter is designed
which not only achieves fast adaptation
but also reaches optimal steady-state disturbance compensation. Finally
the simulation results show that this control scheme is valid and feasible. (2012) Trans Tech Publications
Switzerland.
Research on satellite platform vibration compensation technology for space optical communication (EI CONFERENCE)
会议论文
2012 International Meeting on Opto-Electronics Engineering and Materials Research, OEMR 2012, July 27, 2012 - July 29, 2012, Shenyang, Liaoning, China
Han C.
;
Li X.
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浏览/下载:18/0
  |  
提交时间:2013/03/25
The piezo-electric steering control system is used to compensate the vibration of satellite platform. The mathematical model of piezo-electric steering system is built. The adaptive controller based on improved LMS filter algorithm is designed according to this system characteristic. The adaptive delay filter is designed to solve slow convergence speed problem of traditional algorithm. Meanwhile
the adaptive delay filter can also compensate phase delay of control circuit. The adaptive deviation filter is introduced and it effectively compensates the vibration deviation which is low frequency and high amplitude. The experimental results show that the remained errors are rad
which meets space optical communication requirement and proves that this control scheme is valid and feasible. (2012) Trans Tech Publications
Switzerland.
SGCMG design and time accumulation error analysis (EI CONFERENCE)
会议论文
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
Xu W.
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浏览/下载:15/0
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提交时间:2013/03/25
SGCMG receives much concern due to the performance of its excellent torque output on spacecraft control
it has been applied to large foreign spacecraft already
but late start and only limited to configurations and steering law study in China. Based on the needs of agility small satellites
this article explained the method of SGCMG principle prototype design and proposed the influence on SGCMG output torque precision generated by time accumulation error first time. This article provided a new idea for future SGCMG project development and had good reference value for SGCMG research. 2011 IEEE.
The flow field analysis of the automotive power streering congtrol unit's flow channel (EI CONFERENCE)
会议论文
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China
Cheng K.
;
Yan L.
;
Li G.
;
Tang J.
收藏
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浏览/下载:14/0
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提交时间:2013/03/25
The automotive power steering units must be taken performance test after they are integrated assembly and then left the factory if it is qualified.Because its internal flow channel is very complicated and the residual hydraulic oil can not be eleminated clearly.So we can set up a 3D model flow channel based on CATIA and use FLUENT software to analysis the key flow channel
analysing it's pressure distribution and velocity vector diagram then get the real reasonable resluts
which can provide the basic for the ejector designing. (2011) Trans Tech Publications.
Non-linear compensation algorithm of LOS locating in aerial remote sensor (EI CONFERENCE)
会议论文
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
Li J.
;
Xiu J.
;
Huang P.
;
Li Y.
;
Chen L.
收藏
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浏览/下载:22/0
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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.
United steering of control moment gyros for small satellite with limited gimbal rate (EI CONFERENCE)
会议论文
2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China
Xu K.
;
Jin G.
;
Chen C.
收藏
  |  
浏览/下载:16/0
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提交时间:2013/03/25
Single Gimbal Control Moment Gyroscopes (SGCMG) can could provide large control torque and quick attitude maneuver rate to small satellites without any increase in power
volume and mass
which will help small satellites become more powerful. Singularity avoidance and failure steering are two important problems to SGCMGs and also the main focus in this field. A new united steering law for SGCMGs with capabilities of singularity avoidance and quick transition of singularity surfaces is developed in this paper. To ensuring the existence of null motion
the commanded output of controller was changed real-timely as the variation of singularity measurement of SGCMGs
which can avoid the gimbal angle rate saturation. This developed steering law could help the SGCMGs provide real-time control toques in spite of limitation of gimbal angle rate. Simulation analysis is conducted for a certain 4-SGCMG system mounted on a small satellite. Simulation results indicate that the steering law is very effective in singularity avoidance. 2010 IEEE.
Composite-structure frequency selective surface with tripole elements (EI CONFERENCE)
会议论文
8th International Symposium on Antennas, Propagation and EM Theory, ISAPE 2008, November 2, 2008 - November 5, 2008, Kunming, China
Wang S.
;
Gao J.
;
Feng X.
收藏
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浏览/下载:64/0
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提交时间:2013/03/25
Two composite symmetry structure is proposed in this paper. Based on the integral equation method
the frequency response with large incident angle effect is analyzed. As a result of the numerical analysis
it is shown that the composite symmetry structure with single FSS screen is efficient to stabilize the drift of FSS resonant frequency with the steering of incident angle though transmission loss increased. Especially the structure that the FSS is embedded centrally in the dielectrics has better frequency characteristic with flat top and sharp skirts. The studies have indicated the versatility of the proposed structure. 2008 IEEE.
Study on navigation control method for CyberCar based on machine vision (EI CONFERENCE)
会议论文
2007 IEEE International Conference on Robotics and Biomimetics, ROBIO, December 15, 2007 - December 18, 2007, Yalong Bay, Sanya, China
Zhang R.-H.
;
Wang R.-B.
;
You F.
;
Jia H.-G.
;
Chen T.
收藏
  |  
浏览/下载:19/0
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提交时间:2013/03/25
The guiding principle and composition of CyberCar based on machine vision was introduced. Applying IM sequence signals as input response signals and least squares method to establish the dynamic equation for CyberCar steering system by system identification experiments firstly
and then combined with the preview kinematics model and two-degree steering dynamic model of vehicle. Therefore
it can trace the path steadily and reliably. 2008 IEEE.
the steering control mathematics model based on preview kinematics for CyberCar was established. And then the switching hyper plane is designed by applying the optimal control theory
during the change of the curve curvature radius is little
the curve tracking of the intelligent vehicle is carried out by adopting sliding variable structure controller. Aim at the parameter uncertainty of tire
a vehicle steering system uncertain model was founded and analyzed. A H optimal controller is designed with the method of H control theory to solve the problem about model uncertainty. The simulation and experiment results show that the controller designed by the proposed method has good robustness and adaptability
Dynamics simulation on control technology for 4WS vehicle steering performance (EI CONFERENCE)
会议论文
ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China
Rong-Hui Z.
;
Hong-Guang J.
;
Tao C.
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2013/03/25
By combining visual preview kinematics
dynamic equation of steering system and 2-DOF steering dynamistic model of 4WS
it can easily attenuate the change and uncertainty of model. 2008 IEEE.
we establish the two degree of freedom model of four-wheel steering vehicle. And then the switching hyper plane is designed by applying the optimal control theory. During the change of parameter is little
4WS steering performance is carried out by adopting sliding variable structure controller. To improve the steering performance of 4WS
especially state variables convergent velocity
Kalman filter for 4WS is designed. And the robust optimal controller is designed for model and parameter is uncertainty. The simulation results show that the controller designed by the proposed method has good robustness
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