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- W1066419593 abstract "Centrifugal compressor testing with magnetic bearing excitations is the last step to assure the compressor rotordynamic stability in the designed operating conditions. To meet the challenges of stability evaluation, a new method combining the rational polynomials method (RPM) with the weighted instrumental variables (WIV) estimator to fit the directional frequency response function (dFRF) is presented. Numerical simulation results show that the method suggested in this paper can identify the damping ratio of the first forward and backward modes with high accuracy, even in a severe noise environment. Experimental tests were conducted to study the effect of different bearing configurations on the stability of rotor. Furthermore, two example centrifugal compressors (a nine-stage straight-through and a six-stage back-to-back) were employed to verify the feasibility of identification method in industrial configurations as well." @default.
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- W1066419593 date "2016-02-01" @default.
- W1066419593 modified "2023-10-15" @default.
- W1066419593 title "An identification method for damping ratio in rotor systems" @default.
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- W1066419593 doi "https://doi.org/10.1016/j.ymssp.2015.05.023" @default.
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