期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
AirSpeed广播视频服务器
1
《世界广播电视》 2004年第7期118-118,共1页
关键词 Avid公司 airspeed 广播视频服务器 功能
原文传递
Wind Estimation for UAV Based on Multi-sensor Information Fusion 被引量:1
2
作者 高艳辉 朱菲菲 +1 位作者 张勇 胡寿松 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2015年第1期42-47,共6页
Aiming at the requirements of accurate target positioning and autonomous capability for adapting to the environmental changes of unmanned aerial vehicle(UAV),a new method for wind estimation and airspeed calibration i... Aiming at the requirements of accurate target positioning and autonomous capability for adapting to the environmental changes of unmanned aerial vehicle(UAV),a new method for wind estimation and airspeed calibration is proposed.The method is implemented to obtain both wind speed and wind direction based on the information from a GPS receiver,an air data computer and a magnetic compass,combining with the velocity vector triangle relationships among ground speed,wind speed and air speed.Considering the installation error of Pitot tube,cubature Kalman filter(CKF)is applied to determine proportionality calibration coefficient of true airspeed,thus improving the accuracy of wind field information further.The entire autonomous flight simulation is performed in a constant 2-D wind using a digital simulation platform for UAV.Simulation results show that the wind speed and wind direction can be accurately estimated both in straight line and in turning segment during the path tracking by using the proposed method.The measurement accuracies of the wind speed and wind direction are 0.62 m/s and2.57°,respectively. 展开更多
关键词 wind estimation airspeed calibration unmanned aerial vehicle(UAV) cubature Kalman filter(CKF)
下载PDF
智能虚拟演播室建设心得--以河北广播电视台融媒体新闻中心自动化集控系统为例 被引量:6
3
作者 王洁丽 龚宇 《现代电视技术》 2021年第8期75-78,共4页
本文介绍了河北广播电视台建设的一套新闻节目的虚拟灾备系统,在使用AVID操作系统的新闻直播类节目体系中,合理地运用自动化集控系统、兼顾直播安全与集控自动化的探索,为将来演播室的全面安全自动化播出积累了经验。
关键词 NCS自动化内容管理系统 Mosart自动化播控系统 iNews文稿系统 airspeed视频服务器
下载PDF
Radioactive source localization inside pipes using a long-range alpha detector
4
作者 吴雪梅 庹先国 +4 位作者 李哲 刘明哲 张金钊 董湘龙 李平川 《Chinese Physics C》 SCIE CAS CSCD 2013年第8期50-54,共5页
Long-range alpha detectors (LRADs) are attracting much attention in the decommissioning of nuclear facilities because of some problems in obtaining source positions on an interior surface during pipe decommissioning... Long-range alpha detectors (LRADs) are attracting much attention in the decommissioning of nuclear facilities because of some problems in obtaining source positions on an interior surface during pipe decommissioning. By utilizing the characteristic that LRAD detects alphas by collecting air-driving ions, this article applies a method to localize the radioactive source by ions' fluid property. By obtaining the ion travel time and the airspeed distribution in the pipe, the source position can be determined. Thus this method overcomes the ion's lack of periodic characteristics. Experimental results indicate that this method can approximately localize the source inside the pipe. The calculation results are in good agreement with the experimental results. 展开更多
关键词 LRAD source position ion travel time airspeed LOCALIZATION
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部