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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 Double inverted pendulum control based on three-loop PID and improved BP neural network (EI CONFERENCE) 会议论文 2011 2nd International Conference on Digital Manufacturing and Automation, ICDMA 2011, August 5, 2011 - August 7, 2011, Zhangjiajie, Hunan, China Sang Y.; Fan Y.; Liu B. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 To deal with the defects of BP neural networks used in balance control of inverted pendulum  such as longer train time and converging in partial minimum  this article reaLizes the control of double inverted pendulum with improved BP algorithm of artificial neural networks(ANN)  builds up a training model of test simulation and the BP network is 6-10-1 structure. Tansig function is used in hidden layer and PureLin function is used in output layer  LM is used in training algorithm. The training data is acquried by three-loop PID algorithm. The model is learned and trained with Matlab calculating software  and the simuLink simulation experiment results prove that improved BP algorithm for inverted pendulum control has higher precision  better astringency and lower calculation. This algorithm has wide appLication on nonLinear control and robust control field in particular. 2011 IEEE.   The structure design and analysis of predigest laser combine bind and extend bind flat roof (EI CONFERENCE) 会议论文 2011 International Conference on Advanced Engineering Materials and Technology, AEMT 2011, July 29, 2011 - July 31, 2011, Sanya, China Han X.; Wang B.; Shi K.; Liu C.; Wang H.; Chen Z. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 This paper put forward a kind of predigest laser combine bind and extend bind flat roof structure  which is founded as fission flat roof  and can be built in an little room 1280mm990mm815mm. This flat roof space location can be adjusted. This kind of seat can ensure the system complete laser combine and close as high precision. In this paper we designed the laser combine and close whole structure and install design. At last we did some finite statics analysis to some important parts. This design can ensure every laser fire directional adjust mete lower 30'  and the flat roof quality is 770kg. The transition benchmark flat roof system most meet and emergency is 0.005mm at the premise of bear the weight of turn flat laden. It can be seen that this structure can satisfy the request of many lasers small space laser extend bind and adjust. This kind can be extended to other light combine bind and extend bind structure design. (2011) Trans Tech Publications  Switzerland.   The angular velocity estimation principal of -- filter based on high sampling rate (EI CONFERENCE) 会议论文 2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China Zhang Y.; Chu H. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 In order to get angular velocity of stabilization servo mechanism from angular position sensors  -- filter and its angular velocity transfer function were predigested. Combing with optimum parameters  -- filter based on high sampling rate was established  the effect of and sample rate on filter nature frequency were evaluated. According to the requirements of stabilization platform  the principle of steady and transient tracking filter differential were proved. With the hypothesis of constant acceleration  the frequency characteristics of angular velocity transfer function were analyzed  three-dimensional Kalman filter was simplified  and the filter parameters were designed. The results show that when the spectrum of input signal was lower than 6rad/s  parameters was 0.02  and sampling period were 0.08ms and 0.1ms respectively  the filter can realize differential exactly  when the spectrum was 9rad/s  the precision was no less than 1.1%  the phase leading of angular position was no less than 70  the natural frequency should be higher than the cut-off frequency of stabilization platform was two or three times. In the engineering of electro-optical stabilization servo mechanism  -- filter has properties of tracking differential  and reached the requirement of platform angular velocity estimation. Also it is one of the effective methods to get angular velocity from angular position sensors. 2011 IEEE.   Grating interferometry method for torsion measurement (EI CONFERENCE) 会议论文 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China Li X.-R.; Qiao Y.-F.; Liu W.; Zhang Y.-Y. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 Method of grating interferometry was presented for torsion angle measurement  moire fringe generated by two gratings is used in a new field  it breaks through moire fringe's routine application. Measurement principle is described  torsion angle can be gotten by the tilt angle or the width of moire fringe. Different from moire fringe's characteristic information extracting methods in traditional measurement fields  fringe-tilt method and fringe-width method were put forward to extract moire fringe's characteristic information. Fringe-tilt method is on the basis of moire fringe's tilt to acquire torsion angle  uniform formula was built aiming at all positions of two gratings in the coordinates  fringe-width method is on the basis of moire fringe's width to acquire torsion angle  three key problems are given about fringe-width method. Thick  middle and thin moire fringe were collected in experiments and processed by two methods  fringe-width method's result shows that magnitude of boat torsion error is satisfied with that of theoretical precision analysis  and the change rule of torsion error is also same to that of theoretical analysis  the thicker fringe is  the higher precision is  when fringe width arrives to be 1695m  the precision is 1.7"  the thinner fringe is  the lower precision is  when fringe width arrives to be 734.7m  the precision is 6.7". In addition to these  the results of repeatability experiments  sensibility experiments are given. In a word  the measurement principle is right and the precision of fringe processing is also reliable.