Fast Estimation of Quasi-Steady States of Cyclic Nonlinear Processes Based on Higher-Order Frequency Response Functions. Case Study:  Cyclic Operation of an Adsorption Column

2006 ◽  
Vol 45 (1) ◽  
pp. 266-291 ◽  
Author(s):  
Menka Petkovska ◽  
Ana Marković
Keyword(s):  
Frequency Response ◽  
Higher Order ◽  
Steady States ◽  
Response Functions ◽  
Nonlinear Processes ◽  
Frequency Response Functions ◽  
Adsorption Column ◽  
Fast Estimation ◽  
Cyclic Operation

Characterization of automotive dampers using higher order frequency response functions

1997 ◽  
Vol 211 (3) ◽  
pp. 181-203 ◽  
Author(s):  
S Cafferty ◽  
G. R. Tomlinson
Keyword(s):  
Energy Transfer ◽  
Frequency Response ◽  
Ride Comfort ◽  
Higher Order ◽  
Suspension System ◽  
Response Functions ◽  
Frequency Response Functions ◽  
Damping Coefficients ◽  
Non Linear ◽  
Linear Behaviour

Automotive dampers are an important element of a vehicle's suspension system for controlling road handling and passenger ride comfort. Many automotive dampers have non-linear asymmetric characteristics to accommodate the incompatible requirements between ride comfort and road handling, thus the ride comfort engineer requires techniques that can characterize this non-linear behaviour and provide models of the dampers for use in ride performance simulations of the full suspension system. The work presented in this paper is concerned with developing a frequency domain technique using higher order frequency response functions (HFRFs) to characterize a Monroe automotive damper. The principal diagonals and multidimensional surfaces of the HFRFs up to third order are obtained. Non-linear damping coefficients for the damper are derived from the HFRFs and the energy transfer properties are investigated. The results show that the majority of the HFRFs contain no peaks or resonances, indicating that the damper has no preferred frequencies for energy transfer. The accuracy of the damping coefficients determined from the HFRFs is poor. This is due to the inability of the technique to measure the pure HFRFs and separate the effects of non-linearities in the input actuator from those in the damper. It is concluded that these constraints currently impose some limit on the use of the methodology.

scholarly journals Cancelation of transducer effects from frequency response functions: Experimental case study on the steel plate

2016 ◽  
Vol 8 (4) ◽  
pp. 168781401664544 ◽  
Author(s):  
Pedram Zamani ◽  
Abbas Taleshi Anbouhi ◽  
MR Ashory ◽  
MM Khatibi ◽  
Reza Masoudi Nejad
Keyword(s):  
Frequency Response ◽  
Steel Plate ◽  
Response Functions ◽  
Frequency Response Functions
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