QQ客服 官方微博 反馈留言

浏览/检索结果: 共11条，第1-10条 帮助 限定条件 专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Mathematical modeling and simulating of microscan for area CCD 会议论文 2013 2nd International Conference on Sensors, Measurement and lntelligent Materials, ICSMIM 2013, November 16, 2013 - November 17, 2013, Guangzhou, China Li Y. P.; He B.; Sha W. 收藏  |  浏览/下载：15/0  |  提交时间：2015/04/27 Infrared radiation measurement based on simplified calibration method 会议论文 27th Conference of Spacecraft TT and C Technology, November 9, 2014 - November 12, 2014, Guangzhou, China Chang S.; Li M.; Zhang Y. 收藏  |  浏览/下载：13/0  |  提交时间：2015/04/27 Reentry guidance based on parametric optimization (EI CONFERENCE) 会议论文 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China Li D. 收藏  |  浏览/下载：148/0  |  提交时间：2013/03/25 This paper presents a parametric optimization approach to solve reentry guidance. Due to the various constraints imposed on the trajectory  original guidance problem can be converted into an optimal control problem with a merit function to be minimized. Direct implementation of method of variation and is too complex to get a reasonable result  while a numerical parametric optimization approach is feasible and efficient if we choose appropriate control variables as the optimization parameters and effective optimization algorithm. A simulation of the approach is performed to show its validity on reentry guidance problem: as the value of merit function converges to acceptable threshold  all constraints are hold. (2013) Trans Tech Publications  Switzerland.   Weighted data fusion algorithm in the application of visual measurement network system (EI CONFERENCE) 会议论文 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China Zhou J.; Huang D.-y.; Li S.-j.; Chen X.-l.; Zhang Y.-c. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 For the problem on the deviation of actual measurement values between different network positions of visual measurement network system  so present the weighted data fusion algorithm. To distribute the weight coefficients according to the stability of eigenvector and fuse the coordinates  finally get the ultimate expression of fusion estimate. The experiment results present the maximum absolute tolerance of the fusion results is 0.039mm via the weighted data fusion algorithm  the maximum one via traditional data fusion algorithm of the center of point set is 0.056mm  Repeatedly measure 50 times  compared with the traditional algorithm  proposed weighted data fusion algorithm has much better precision and better stability. (2013) Trans Tech Publications  Switzerland.   Data normalization of single camera visual measurement network system 会议论文 2012 International Conference on Information Technology and Management Innovation, ICITMI 2012, November 10, 2012 - November 11, 2012, Guangzhou, China Zhou J.; Li S.-J.; Huang D.-Y.; Chen X.-L.; Zhang Y.-C. 收藏  |  浏览/下载：9/0  |  提交时间：2014/05/15 Weighted data fusion algorithm in the application of visual measurement network system 会议论文 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China Zhou J.; Huang D.-y.; Li S.-j.; Chen X.-l.; Zhang Y.-c. 收藏  |  浏览/下载：12/0  |  提交时间：2014/05/15 Data normalization of single camera visual measurement network system (EI CONFERENCE) 会议论文 2012 International Conference on Information Technology and Management Innovation, ICITMI 2012, November 10, 2012 - November 11, 2012, Guangzhou, China Zhou J.; Li S.-J.; Huang D.-Y.; Chen X.-L.; Zhang Y.-C. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 With the development of visual measurement system  Normalize the measured coordinates into the same world coordinate system  Apply in the three coordinate measuring machine(CMM) to have the simulation experiment  So the data normalization has the advantage of more high precision. (2013) Trans Tech Publications  the visual measurement system of single camera which applied in the imaging theory of optical feature points  then get the global data  the result indicates that the maximum absolute tolerance between the normalization coordinates via the center of point set and the ones measured by CMM directly is 0.058mm  Switzerland.  it has been widespread used in the modern production. Due to the limit of the environment in scene  and achieve the overall measurement  the visual measurement system of single camera could not measure the shield between the measured objects each other. Focus on this problem  But the one between the coordinate repeatedly measured at the position of one network control point is 0.066mm  present a kind of the the knowledge of measurement network based on the visual measurement of single camera  set up the measurement network system via the multi-control points. Measure the optical feature points in every network control point via the visual measurement system of single camera   Reentry guidance based on parametric optimization 会议论文 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China Li D. 收藏  |  浏览/下载：9/0  |  提交时间：2014/05/15 Space optical remote sensor of the CAE thermal control index calculation method (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 Li L. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 The thermal control indicators CAE methods of Space optical remote sensor are analyzed in the presented work. We sat up a thermal optical analysis model for space optical remote sensor. By assuming fully covered by in-orbit temperature load  and using the finite element method for thermal deformation analysis  we obtained the optical remote sensor surface deformation and displacement under various thermal loading. Using ZERNIKE polynomial  wave was fitted to obtain ZERNIKE polynomial coefficients which were incorporated into the optical system design. Using CODE V optical calculation software  heat-ray machines under elastic deformation of the system point spread function  transfer function (MTF)  wave front differential (WFE) etc. were calculated. Image quality changes of remote sensors are discussed in variety assumed cases such as temperature loads of quality change. By repeated iteration  critical value of temperature fields meeting the design requirements are obtained for the optical system. Optical indicators were converged to the temperature field indicator  then reasonable indicators of thermal control for remote sensors were obtained. For the thermal control design  this method provided a reliable basis for design. (2011) Trans Tech Publications  Switzerland.   Design of control system of DC motor based on fusion FPGA (EI CONFERENCE) 会议论文 2011 International Conference on Mechatronics and Materials Processing, ICMMP 2011, November 18, 2011 - November 20, 2011, Guangzhou, China Zhu D. D.; Li H. W. 收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25 Along with the development of microelectronic process  it is possible to integrate a big system in one chip. A new way to implement system on a chip is provided by the advent of FPGA. Based on Verilog HDL and the Actel Fusion AFS600 FPGA chip  the speed closed-loop control system of DC motor was designed by using options of combining the top-down thinking and the bottom-up method. PID control algorithm  encoder signal processing and PWM waveform generation etc were realized by the system. The results show that the system structure is simplified and the stability and reliability are improved. A solution of system on a chip is realized to some extent. It has extensive application value in engineering practice. 2011 Trans Tech Publications.