کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7121574 1461468 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of a dead weight torque machine by a generalized least square approach
ترجمه فارسی عنوان
ارزیابی یک ماشین گشتاور با استفاده از روش حداقل مربع عمومی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
چکیده انگلیسی
Calibration of primary dead weight torque machines (DWTMs) is mainly a National Metrology Institutes (Is) task. However, traceability is obtained via dimensional and mass quantities and several secondary's laboratories have sufficient Best Measurement Capabilities (BMCs) to achieve acceptable uncertainty levels. This paper describes a method that combine length and mass measurements in a Generalized Least Squares (GLS) approach that avoid the evaluation of complex uncertainty contributions. The method was implemented on in-house developed DWTMs; the sensitivity limit is first examined for each momentum arm length. Several dimensional measurements were made with an Articulated Arm Coordinate Measuring Machine (AACMM). A set of mass measurements from different equilibrium combination were taken and all information was introduced in the GLS with the advantage of the consistency check via chi square test. Regardless of the uncertainties levels of case treated, this method can be applicable to any DWTM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 119, April 2018, Pages 91-96
نویسندگان
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