在当今的制造企业中,数控加工中心已经十分常见。在众多的数控系统中,FANUC Oi Mate-MD以稳定的性能、过硬的质量,成为许多制造企业的首选。但是在实际使用当中也存在一些情况会使机床参数丢失,例如数据电池电量不足、误删除数据和带电...在当今的制造企业中,数控加工中心已经十分常见。在众多的数控系统中,FANUC Oi Mate-MD以稳定的性能、过硬的质量,成为许多制造企业的首选。但是在实际使用当中也存在一些情况会使机床参数丢失,例如数据电池电量不足、误删除数据和带电误操作烧毁元器件等。现就这些情况进行论述,介绍了设置参考点、恢复系统数据、设置铣刀换刀高度和准停角度以及刀库号复位等的方法,对于一般技术维修人员有较好的参考价值。展开更多
In this paper, we study the problems related to parameter estimation of a single-input and single-output networked control system, which contains possible network-induced delays and packet dropout in both of sensor-to...In this paper, we study the problems related to parameter estimation of a single-input and single-output networked control system, which contains possible network-induced delays and packet dropout in both of sensor-to-controller path and controller-to-actuator path. A weighted least squares(WLS) method is designed to estimate the parameters of plant, which could overcome the data uncertainty problem caused by delays and dropout. This WLS method is proved to be consistent and has a good asymptotic property. Simulation examples are given to validate the results.展开更多
The variance-dependent Goldstein radar interferogram filter takes into account the information of both interferometric coherence and multilook factors,and can produce very consistent results for interferograms generat...The variance-dependent Goldstein radar interferogram filter takes into account the information of both interferometric coherence and multilook factors,and can produce very consistent results for interferograms generated under a wide variety of multilook factors and with very different noise level.However,the filter is a bit complicated and its application is still very limited.We present the designing and implementation of the variance-dependent Goldstein radar interferogram filtering,emphasizing on the logic flow,the generation of look-up table,the determination of filtering parameter,and the handling of edge information loss.Experiments with real interferograms are provided to demonstrate the applications of the designed filtering.Comparisons with the result of the coherence-dependent Goldstein filter show that improvements from 18.4% to 36.9% are achieved when the variance-dependent filter is used,and the noisier the interferogram,the greater the improvement.展开更多
文摘在当今的制造企业中,数控加工中心已经十分常见。在众多的数控系统中,FANUC Oi Mate-MD以稳定的性能、过硬的质量,成为许多制造企业的首选。但是在实际使用当中也存在一些情况会使机床参数丢失,例如数据电池电量不足、误删除数据和带电误操作烧毁元器件等。现就这些情况进行论述,介绍了设置参考点、恢复系统数据、设置铣刀换刀高度和准停角度以及刀库号复位等的方法,对于一般技术维修人员有较好的参考价值。
基金Supported by the National Natural Science Foundation of China(61290324)
文摘In this paper, we study the problems related to parameter estimation of a single-input and single-output networked control system, which contains possible network-induced delays and packet dropout in both of sensor-to-controller path and controller-to-actuator path. A weighted least squares(WLS) method is designed to estimate the parameters of plant, which could overcome the data uncertainty problem caused by delays and dropout. This WLS method is proved to be consistent and has a good asymptotic property. Simulation examples are given to validate the results.
基金Project(2013CB733303)supported by the National Basic Research Program of ChinaProjects(41222027,11103068,41104003)supported by the National Natural Science Foundation of China+3 种基金Project(13JJ1006)supported by Hunan Provincial Natural Science Foundation,ChinaProject(TXCL-KF2013-002)supported by the Key Laboratory of Videometric and Vision Navigation of Hunan Province,ChinaProject(SKLGED2013-2-1-E)supported by the State Key Laboratory of Geodesy and Earth’s Dynamics,ChinaProject(K201208)supported by the Key Laboratory of Earth Observation Technique of National Administration of Surveying,Mapping and Geoinformation,China
文摘The variance-dependent Goldstein radar interferogram filter takes into account the information of both interferometric coherence and multilook factors,and can produce very consistent results for interferograms generated under a wide variety of multilook factors and with very different noise level.However,the filter is a bit complicated and its application is still very limited.We present the designing and implementation of the variance-dependent Goldstein radar interferogram filtering,emphasizing on the logic flow,the generation of look-up table,the determination of filtering parameter,and the handling of edge information loss.Experiments with real interferograms are provided to demonstrate the applications of the designed filtering.Comparisons with the result of the coherence-dependent Goldstein filter show that improvements from 18.4% to 36.9% are achieved when the variance-dependent filter is used,and the noisier the interferogram,the greater the improvement.
