Estimation of Forcing Function, Mistuning and Modal Damping in a Bladed Rotor

2019 ◽  
Author(s):  
Arjun Singh Chauhan ◽  
Alok Sinha
Keyword(s):  
Kalman Filter ◽  
State Space ◽  
Unscented Kalman Filter ◽  
State Space Model ◽  
Space Model ◽  
Vibration Data ◽  
Forcing Function ◽  
Modal Damping ◽  
Bladed Rotor ◽  
Augmented State

Abstract This paper deals with the estimation of forcing function, modal damping and mistuned modal stiffnesses in a bladed rotor. Previous research on parameter estimation in a mistuned bladed rotor relies on the knowledge of the forcing function as well as the vibration data. This paper presents two novel approaches. The first approach relies on knowledge of both the forcing and vibration data. The parameters are treated as states of the system and an augmented state space model is created. Unscented Kalman Filter is then used on the steady state data to estimate the parameters. The second approach eliminates the dependence on forcing data. Both the forcing and parameters are now treated as states of the system to construct an augmented state space model. Unscented Kalman Filter is then used on transient vibration data for estimation. Numerical results are presented for a simple model of a mistuned bladed rotor which considers a single mode of vibration per blade.

DCO2 on-line measurement used in rapamycin fed-batch fermentation process

2008 ◽  
Vol 43 (4) ◽  
pp. 351-355 ◽  
Author(s):  
Yinliang Chen ◽  
Jeffrey Krol ◽  
Weimin Huang ◽  
Julia P. Cino ◽  
Rajul Vyas ◽  
...  
Keyword(s):  
Batch Fermentation ◽  
Fermentation Process ◽  
Fed Batch ◽  
Line Measurement ◽  
Fed Batch Fermentation ◽  
On Line
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