scholarly journals A transfer matrix model for analysis of noise and vibration in automotive power steering systems

1994 ◽  
Vol 95 (5) ◽  
pp. 2995-2995
Author(s):  
Mardi C. Hastings ◽  
Chuan‐Chiang Chen
Keyword(s):  
Transfer Matrix ◽  
Matrix Model ◽  
Noise And Vibration ◽  
Power Steering

Characterisation of the Humming-Type Noise and Vibration of the Automotive HVAC System

2019 ◽  
Vol 16 (2) ◽  
pp. 6634-6648
Author(s):  
A. Z. A. Mazlan ◽  
M. H. A. Satar ◽  
M. H. Hamdan ◽  
M. S. Md. Isa ◽  
S. Man ◽  
...  
Keyword(s):  
Vibration Characteristics ◽  
Operating Conditions ◽  
Hvac System ◽  
Frequency Range ◽  
Noise And Vibration ◽  
Power Steering ◽  
Pump Compressor

The automotive heating and ventilating air condition (HVAC) system, when vibrating, can generate various types of noises such as humming, hissing, clicking and air-rushes. These noises can be characterised to determine their root causes. In this study, the humming-type noise is taken into consideration whereby the noise and vibration characteristics are measured from various HVAC components such as power steering pump, compressor and air conditional pipe. Four types of measurement sensors were used in this study - tachometer for rpm tracking; accelerometer for the vibration microphone for the noise; and sound camera for the visualization measurement. Two types of operating conditions were taken into consideration - they were “idle” (850 rpm) and “running” (850-1400 rpm) conditions. A constant blower speed was applied for both conditions. The result shows that the humming noises can be determined at the frequency range of 300-350 Hz and 150-250 Hz for both idle and running conditions, respectively. The vibration of the power steering pump shows the worst acceleration of 1.8 m/s2 at the frequency range of 150-250 Hz, compared to the compressor and air conditional pipe. This result was validated with the 3D colour order and sound camera analyses, in which the humming noise colour mapping shows dominance in this frequency range.  

scholarly journals An improved transfer-matrix 
model for optical superlenses

2009 ◽  
Vol 17 (16) ◽  
pp. 14260 ◽  
Author(s):  
Ciaran P. Moore ◽  
Richard J. Blaikie ◽  
Matthew D. Arnold
Keyword(s):  
Transfer Matrix ◽  
Matrix Model

A Ray Transfer Matrix Model for an Elastomeric Lens

2011 ◽  
Vol 110-116 ◽  
pp. 4145-4148
Author(s):  
Johanna Mae M. Indias ◽  
Clark Kendrick C. Go
Keyword(s):  
Transfer Matrix ◽  
Matrix Model ◽  
Focal Length ◽  
Effective Focal Length ◽  
Length Changes ◽  
Variable Focus ◽  
Tunable Lens

A Ray Transfer Matrix (RTM) of a variable-focus elastomeric fluidic lens is explored and modeled in this paper. A HeNe (543.45nm wavelength) laser is incident on the tunable lens and the effective focal length changes are explored based on this model. Results show that there are two possible focal lengths and that focal lengths are independent of the elastomer thickness.

Plano-concave microresonator sensors for photoacoustic imaging: optical sensitivity maximization using transfer matrix model

2021 ◽  
Author(s):  
David Martin-Sanchez ◽  
James A. Guggenheim ◽  
Edward Z. Zhang ◽  
Dylan M. Marques ◽  
Peter R. T. Munro ◽  
...  
Keyword(s):  
Transfer Matrix ◽  
Matrix Model ◽  
Photoacoustic Imaging ◽  
Optical Sensitivity

Combating noise and vibration in power steering systems

Noise Notes ◽  
2003 ◽  
Vol 2 (2) ◽  
pp. 35-40
Author(s):  
Alexander Berdichevsky
Keyword(s):  
Noise And Vibration ◽  
Power Steering

scholarly journals Modeling of Sonotrode System of Ultrasonic Consolidation With Transfer Matrix Method

2021 ◽  
Vol 8 ◽  
Author(s):  
Yin Wang ◽  
Ziyan Chen ◽  
Qing Yu ◽  
Fang Cheng
Keyword(s):  
Finite Element ◽  
Transfer Matrix ◽  
Matrix Model ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Experimental Result ◽  
Ultrasonic Consolidation ◽  
Modeling Methods ◽  
Resonance Frequencies ◽  
The Difference

To establish an efficient model for sonotrode system, a key part that continuously applies ultrasonic oscillation on metal foils to form solid state bond in ultrasonic consolidation equipment, this research presents modeling methods for sonotrode system. After an introduction to the construction of sonotrode system along with its operating principle, the transfer matrix method was adopted to build the model for the system consisting two ultrasonic transducers and one sonotrode. Simulation results of transfer matrix model were compared to that of finite element method. A prototype was fabricated and tested. A comparison of the resonance frequencies calculated by two modeling methods to the experimental result showed that the difference between transfer matrix model and prototype is 6.96% while the difference between finite element model and prototype is 9.26%. The proposed transfer matrix method is an efficient way to simulate dynamic performances for sonotrode system, which provide a better foundation for further optimization.

Transfer matrix model for evaluation of optical switch structures

1990 ◽  
Vol 26 (1) ◽  
pp. 6-7 ◽  
Author(s):  
J.J. Dharmadi ◽  
H. Mulder ◽  
A. Diekema ◽  
A.G. De waal
Keyword(s):  
Transfer Matrix ◽  
Matrix Model ◽  
Optical Switch
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