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A novel heat transfer model of a phase change material using in solar power plant 期刊论文  OAI收割
APPLIED THERMAL ENGINEERING, 2018, 卷号: 129, 页码: 557-563
作者:  
Mao, Qianjun;  Chen, Hongzhang;  Zhao, Yazhou;  Wu, Hongjun
  |  收藏  |  浏览/下载:35/0  |  提交时间:2018/09/26
A novel heat transfer model of a phase change material using in solar power plant 期刊论文  OAI收割
APPLIED THERMAL ENGINEERING, 2018, 卷号: 129, 页码: 557-563
作者:  
Mao, Qianjun;  Chen, Hongzhang;  Zhao, Yazhou;  Wu, Hongjun
  |  收藏  |  浏览/下载:40/0  |  提交时间:2018/09/26
Estimating the Sea State Bias of Jason-2 Altimeter From Crossover Differences by Using a Three-Dimensional Nonparametric Model 期刊论文  OAI收割
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, 2016, 卷号: 9, 期号: 11, 页码: 5023-5043
作者:  
Jiang, Maofei;  Xu, Ke;  Liu, Yalong;  Wang, Lei
收藏  |  浏览/下载:30/0  |  提交时间:2017/01/18
Experiments and finite element simulations on micro-milling of aluminium alloy7050-T7451 (EI CONFERENCE) 会议论文  OAI收割
10th Asia-Pacific Conference on Materials Processing, APCMP 2012, June 14, 2012 - June 17, 2012, Jinan, China
作者:  
Li J.;  Li J.;  Li J.;  Zhou J.;  Wang F.
收藏  |  浏览/下载:29/0  |  提交时间:2013/03/25
Linear auto disturbance rejection controller for vector-controlled PMSM drive system (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Transportation, Mechanical, and Electrical Engineering, TMEE 2011, December 16, 2011 - December 18, 2011, Changchun, China
作者:  
Zhang K.;  Zhang K.;  Zhang K.;  Zhang K.
收藏  |  浏览/下载:36/0  |  提交时间:2013/03/25
A high-performance robust controller of permanent-magnet synchronous motor (PMSM) drive with cascade linear auto disturbance rejection controller (LADRC) is proposed. The robust controller combines the simplicity of linear controller and the merit of the auto disturbance rejection controller (ADRC). First  a systematic mathematical model is derived according to the required specifications for the PMSM drive system. Then  for the model  this paper designs the controller that includes three first-order LADRCs. The controller does not rely on the accurate mathematical model of motor. The controller can estimate and compensate the disturbances that include load disturbance and systematic parameters changes by the linear extended state observer (LESO). Simulation results show that compared with conventional PI controller  the proposed approach has strong robustness. In the same load disturbance  the speed fluctuation of the LADRCs accounts for 30% of PI controller. 2011 IEEE.  
Nonlinear analysis method for predicting optical surface deformations resulted from assembly process (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China
Dong W.; Yong Y.; Guang J.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
There are three main nonlinear elements in the large mirror assemblies  which are screw pretension  adhesive stress and state changes in the assembly process. The optical shape will be influenced seriously by these factors. But the impacts will not be shown in linear analysis results  because as the simplification  these factors have been ignored. The nonlinear analysis method for predicting optical surface deformations resulted from assembly process is discussed in detail. Take a typical mirror support structure for example  the nonlinear analysis model was established. Comparing the calculation results with the optical shape test  it is illustrated that nonlinear analysis is more accurate and closer to the test result. And according to the simulation result  the bowl-shaped depression which was discovered in the test can also be explained reasonably. 2010 Copyright SPIE - The International Society for Optical Engineering.  
Position servo control of a DC electromotor using a hybrid method based on model reference adaptive control (MRAC) (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者:  
Chen J.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
This paper dealed with position control problems of a DC motor servo system that had nonlinear friction and was subject to parametric uncertainties  external disturbances  etc. In order to overcame those unfavourable factors mentioned above  a model reference adaptive control method was proposed to regulate the important and main speed loop in the positioning system which was designed with three closed control loop  where a compensatory measure was given so as to counterbalance the friction torque disturbances. In addition  the other two close loops were built in adjusting the position and the current of the servo system respectively that aimed to achieve the fast and precise positioning and increase dynamic stiffness against load disturbances. Experimental results illustrate satisfactory performances in steady state error  load capability  high rapidity and so on. 2010 IEEE.  
Theoretical investigation on the one- and two-photon absorption properties for a series of symmetrical charge transfer fluorene-phenylene and fluorene-thiophene derivatives 期刊论文  OAI收割
theochem-j. mol. struct., 2006, 卷号: 772, 期号: 1-3, 页码: 81, 87
马文波; 吴谊群; 顾冬红; 干福熹
收藏  |  浏览/下载:1328/242  |  提交时间:2009/09/22