The Influence of the Cross-Coupling Effects on the Dynamics of Rotor/Stator Rubbing

2010 ◽  
pp. 121-132 ◽  
Author(s):  
Zhiyong Shang ◽  
Jun Jiang ◽  
Ling Hong
Keyword(s):  
Cross Coupling ◽  
Coupling Effects ◽  
The Cross

Theoretical Investigation on Cross-Coupling Effect of Two-Dimensional Compound Pendulum Tiltmeter

2018 ◽  
Vol 07 (02n03) ◽  
pp. 1850007
Author(s):  
Lihua Wu ◽  
Yu Huang
Keyword(s):  
Dynamic Response ◽  
Vibration Isolation ◽  
Coupling Effect ◽  
Low Frequency ◽  
Cross Coupling ◽  
Coupling Factor ◽  
Two Dimensional ◽  
Coupling Coefficients ◽  
Coupling Effects ◽  
The Cross

The active vibration isolation of low-frequency tilt is important for precise scientific measurement. However, the cross-coupling effects in tilt sensitive probes introduce negative effects on the performance of active isolation devices. In this paper, we show the structure and basic principle of compound pendulum (CP)-type tiltmeter, and analyze the dynamic response of the CP to the two-dimensional tilt vibrations. Besides, we deduce theoretically the mathematical model of the capacitive sensing of the displacements of the CP. Finally, we evaluate numerically the cross-coupling effects of a tilt sensitive probe including the cross-couplings of dynamic response and the different capacitance variations in two orthogonal degrees of freedoms. The maximum of the mechanical dynamic coupling factor is less than −60[Formula: see text]dB. The total cross-coupling coefficients including the different capacitance variations of the probe are both less than [Formula: see text]. Therefore, the cross-coupling effects don’t have to be considered for this kind of two-dimensional tilt sensitive probe.

Field trials with the LaCoste and Romberg straight‐line gravimeter

Geophysics ◽  
1983 ◽  
Vol 48 (5) ◽  
pp. 611-617 ◽  
Author(s):  
H. D. Valliant
Keyword(s):  
Correlation Analysis ◽  
Field Tests ◽  
Cross Coupling ◽  
Field Trials ◽  
Coupling Effects ◽  
Straight Line ◽  
Corrected Data ◽  
Correlation Techniques ◽  
The Cross

During field tests in 1980, the prototype of the LaCoste and Romberg straight‐line gravimeter (ser. no. SL-1) generally produced gravity values intermediate between those of two comparison “S” meters (ser. nos. S-56 and S-41). Correlation analysis shows that the data from SL-1 with no cross‐coupling correction are 15 percent smoother even in rough weather than the corrected data from either S meter. When corrections to the cross‐coupling effects are applied through postcruise correlation techniques, the curvature (degree of smoothness) of the respective data agrees to within 2 percent for each meter. These results verify that cross‐coupling errors have been virtually eliminated in the new gravimeter.

Using Cross-Coupling Effects for Suppression of Contact Severity

2014 ◽  
Vol 614 ◽  
pp. 48-52 ◽  
Author(s):  
Zhi Yong Shang ◽  
Talgar Shaymurat ◽  
Li Jun Xu
Keyword(s):  
Contact Surface ◽  
Cross Coupling ◽  
Stability Domain ◽  
Coupling Effects ◽  
System Parameters ◽  
The Cross ◽  
The Stability ◽  
Rotor Stiffness

In this paper the influence of cross-coupling effects on the rubbing-related dynamics of rotor/stator systems is investigated. The model considered in this paper is a 4-dof rotor/stator system which takes into account the dynamics of the stator and the deformation on the contact surface as well as the cross-coupling effects. The stability of the synchronous full annular rub solution of the model is first analyzed. Then, the cross-coupling effects on the stability of the system at different system parameters are studied. It is found that the cross-coupling effects of the rotor stiffness as well as those of the stator damping and stiffness will benefit the synchronous full annular rubs while the cross-coupling damping of the rotor will reduced the stability domain of the response and lead the system to a response with a heavier rubbing

scholarly journals On the Cross Coupling Effects in Structural Response of Switched Reluctance Motor Drives

2019 ◽  
Vol 34 (2) ◽  
pp. 620-630 ◽  
Author(s):  
Marcio Kimpara ◽  
Shiliang Wang ◽  
Renata Reis ◽  
Joao Pinto ◽  
Mehdi Moallem ◽  
...  
Keyword(s):  
Structural Response ◽  
Cross Coupling ◽  
Switched Reluctance Motor ◽  
Motor Drives ◽  
Coupling Effects ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
The Cross ◽  
Switched Reluctance Motor Drives

A horizontal linear vibrator for measuring the cross-coupling coefficient of superconducting gravity gradiometers

Measurement ◽  
2021 ◽  
Vol 174 ◽  
pp. 109083
Author(s):  
Lu Zhang ◽  
Yuntao Qiu ◽  
Xikai Liu ◽  
Liang Chen ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Coupling Coefficient ◽  
Cross Coupling ◽  
Superconducting Gravity ◽  
The Cross

scholarly journals Divergent Pathways Regulate Ligand-Independent Activation of ERα in SK-N-BE Neuroblastoma and COS-1 Renal Carcinoma Cells

1998 ◽  
Vol 12 (6) ◽  
pp. 835-841
Author(s):  
Cesare Patrone ◽  
Elisabetta Gianazza ◽  
Sabrina Santagati ◽  
Paola Agrati ◽  
Adriana Maggi
Keyword(s):  
Cell Line ◽  
Intracellular Signaling ◽  
Steroid Receptors ◽  
Neuroblastoma Cell ◽  
Cross Coupling ◽  
Activation Function ◽  
Neuroblastoma Cell Line ◽  
Membrane Receptors ◽  
Insulin Dependent ◽  
The Cross

Abstract The α-estrogen receptor (ERα) transcriptional activity can be regulated either by binding to the cognate ligand or by intracellular signaling pathways responsive to a variety of factors acting through cell membrane receptors. Studies carried out in HeLa and COS-1 cells demonstrated that the cross-coupling between estrogen and growth factor receptors is mediated by p21ras and requires phosphorylation of a specific serine residue (Ser 118 in the human ERα and Ser 122 in mouse ERα) located in the ERα N-terminal activation function 1 (AF-1). Likewise, in the SK-N-BE neuroblastoma cell line p21ras is involved in the cross-coupling between insulin and ERα receptors. However, in this cell line Ser 122 is not necessary for insulin-dependent activation of unliganded ERα. In addition, after insulin activation, the electrophoretic mobility associated to serine hyperphosphorylation of ERα in SK-N-BE and in COS-1 cells is different. Our study rules out the possibility of tyrosine phosporylation in unliganded ERα activation by means of transactivation studies of ERα tyrosine mutants and analysis of Tyr phosphorylation immunoreactivity. The two cofactors for steroid receptors RIP 140 and SRC-1 do not seem to be specifically involved in the insulin-induced ERα transactivation. The present study demonstrates the possibility of an alternative, cell-specific pathway of cross-coupling between intracellular and membrane receptors, which might be of importance for the understanding of the physiological significance of this mode of activation in the nervous system.

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