共查询到20条相似文献,搜索用时 62 毫秒
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从超高功率整流装置的谐波治理和运行可靠性出发,提出采用单机24脉波、非同相逆并联整流装置的具体方案。分析了采用本方案时取消或简化滤波装置的可能性,阐述了提高整流柜可靠性的措施。 相似文献
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本文就兰州铝厂,沁阳铝厂,山东铝厂三套滤波装置保护的运行实践,总结电解铝厂滤波装置保护的成功经验,提出笔者对滤波装置保护的体会,为今后设计电解铝厂滤波装置保护提供参考。 相似文献
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3TPT并联机构的误差补偿方法 总被引:1,自引:0,他引:1
以三平移并联机器人为研究对象,建立3TPT机构参数、机构误差以及动平台位姿误差的关系方程;在求解位姿误差正解模型的基础上,对其精度补偿进行了较系统的研究,从理论上推出一种机构位姿精度补偿的方法.该方法通过对机器人支链驱动杆补偿量的控制,来提高输出位姿精度.通过典型实例校核证实了该方法的有效性.研究结果为机器人的实际精度补偿与精度控制提供了新的理论,对于优化3TPT并联机器人的机构设计有重要意义. 相似文献
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R.P.R. Hasanzadeh A.R. Moghaddamjoo S.H.H. Sadeghi A.H. Rezaie M. Ahmadi 《NDT & E International》2008,41(5):371-381
True estimation of the boundary and size of defects are major problems in eddy current (EC) non-destructive evaluation of conductive materials. EC image processing techniques can be used for better estimation of defect details. Because of non-stationary nature of EC C-scan images and same intensities of noise and defect histograms, the linear techniques do not produce good results. In this paper a non-linear signal-adaptive filter based on maximum likelihood (SAML) criterion is designed and successfully used for defect detection. The model of EC noise in this filter is assumed to be non-zero mean complex Gaussian process. The desired model of SAML (MSAML) filter is also modified to further reduce the probability of error and enhance defect details and boundary realization. Simulated and experimental results demonstrate the successful performance of the SAML and MASML filters in estimation of defect details and noise removal. 相似文献
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根据中职与高职职业教育协调发展的背景,分析了相对接的中高职学校人才培养方案,从人才培养的定位与人才需求的现状入手,提出了中高职模具专业的课程体系衔接的思路与对策。 相似文献
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自适应FIR滤波器在转子动平衡检测系统中的应用研究 总被引:2,自引:0,他引:2
在介绍转子动平衡测量原理的基础上,设计适用动平衡测量的自适应低通FIR滤波器,重点分析采样频率的选取,FIR滤波器的优化,野点对滤滤器性能的影响。以及整周期处理。 相似文献
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本文介绍了测量电焊机电性能的一种仪器的原理。该仪器采用单片微机控制,能够快捷、准确地测量各种电参数,精度不受波形影响。特别适用于弧焊电源等非线性负荷电参数的测试。 相似文献
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C. C. Menzemer L. Fei T. S. Srivatsan 《Journal of Materials Engineering and Performance》1999,8(2):211-218
In a spectrum of structures made from pure aluminum and aluminum-base alloys, plates are used frequently as the choice candidate
for connecting elements. Design of safe, efficient, and reliable connections necessitates that adequate consideration be given
to failure of the fastener element, distress of material in the immediate vicinity of the fastener(s), tensile failure of
the net section, and even tear out of the fastener group(s). The mechanical response and failure characteristics of aluminum
connecting elements are presented and discussed in this paper. An experimental and analytical program was conducted to rationalize
failure of connecting elements made from an aluminum-magnesium alloy. Gusset plates representing different bolt patterns were
mechanically deformed. Models to estimate the capacity of the joints were examined and compared with experimentally determined
results. 相似文献