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基于几何模式识别的发动机传感器故障诊断 被引量:10
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作者 黄向华 丁毅 《航空学报》 EI CAS CSCD 北大核心 2006年第6期1018-1022,共5页
提出一种基于几何模式识别技术的发动机传感器故障诊断方法,以解决传感器缓慢漂移故障和由于安装制造差异和性能蜕化等造成的模型不匹配难以区分的问题。传感器测量值输入到自适应模型中,产生一组部件性能修正因子,作为故障模式来对传... 提出一种基于几何模式识别技术的发动机传感器故障诊断方法,以解决传感器缓慢漂移故障和由于安装制造差异和性能蜕化等造成的模型不匹配难以区分的问题。传感器测量值输入到自适应模型中,产生一组部件性能修正因子,作为故障模式来对传感器故障进行诊断,每种故障或性能蜕化都对应惟一的模式,采用几何模式识别技术隔离出传感器故障。以某型涡扇发动机为对象进行的仿真结果表明,该方法能诊断出传感器小漂移故障,并能对部件状态进行监控。 展开更多
关键词 航空 航天推进系统 航空发动机 几何模式识别 故障诊断 传感器 自适应模型
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Optimised Pattern Recognition for Robotic Weldment Geometry Measuring
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作者 Guido Hoffmeier Maria Plyusnina +1 位作者 Bernd Kuhlenkoetter Jobst Bickendorf 《Journal of Mechanics Engineering and Automation》 2012年第11期688-693,共6页
Today, automated robot welding of components with low tolerances in series production is state-of-the-art. But turning to small batch production particularly of parts with high tolerances, engineering and construction... Today, automated robot welding of components with low tolerances in series production is state-of-the-art. But turning to small batch production particularly of parts with high tolerances, engineering and construction of automated solutions is just at the beginning of providing economic efficiency. While weld seam tracking is well established for the described problem, geometric recognition of weldments is not yet solved satisfactorily. This paper will present an optimisation approach of a laser sensor guided and programmed robot welding system which was developed within the project ROPROF at the TU Dortmund. With this development, a working prototype of a robot weld system was built by a steel construction company as well as additional demonstration software showing the potential and transferability of adjusted geometric location of weldments for industrial applications. 展开更多
关键词 Geometry measuring welding process control welding start point search seam finding error correction.
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