A “Mechanical” Vision of Image-Based Identification methods in Structural Dynamics

Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6 - Conference Proceedings of the Society for Experimental Mechanics Series ◽

10.1007/978-3-030-47721-9_12 ◽

2020 ◽

pp. 105-108

Author(s):

Paolo Castellini ◽

Emanuele Zappa

Keyword(s):

Structural Dynamics ◽

Identification Methods

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Structural Dynamic Load and Parameter Identification Based on Dummy Measurements of Displacement

Shock and Vibration ◽

10.1155/2020/8886714 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9

Author(s):

Ting Wang ◽

Zhimin Wan ◽

Weiguang Zheng ◽

Shuilong He

Keyword(s):

Parameter Identification ◽

Structural Dynamics ◽

Information Integration ◽

Integration Method ◽

Covariance Matrices ◽

Least Square ◽

Structural Dynamic ◽

Identification Methods ◽

Uncertain Structure ◽

Previous Identification

Structural load and parameter identification are the essential contents in the field of structural dynamics, and some studies pay attention to the coupled recognition of uncertain structure parameters as well as unacquainted loads. Gillijns and De Moor presented the Kalman-type filter, which was used in the work for coupled identification as the unabbreviated form of GDF. However, it has been demonstrated that it is unstable for the extended GDF (EGDF) method, drifting in the identified unacquainted loads as well as displacement, just like most previous identification methods based on the least-square algorithm. In order to deal with this unstable issue, this paper applied the dummy measurements of displacements on a position level and modifies the EGDF algorithm using the information integration method about the accelerated measurements with dummy measurements. Numerical example of a truss is used for validating the applicability of the method in the work, and an influence of covariance matrices in dummy displacements is also considered.

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Structural dynamics of P-type ATPase ion pumps

Biochemical Society Transactions ◽

10.1042/bst20190124 ◽

2019 ◽

Vol 47 (5) ◽

pp. 1247-1257 ◽

Cited By ~ 17

Author(s):

Mateusz Dyla ◽

Sara Basse Hansen ◽

Poul Nissen ◽

Magnus Kjaergaard

Keyword(s):

Structural Dynamics ◽

Single Molecule ◽

New Technologies ◽

Atp Hydrolysis ◽

Resonance Energy Transfer ◽

Resonance Energy ◽

Time Resolved ◽

Dynamics Simulations ◽

Types Of Information ◽

P Type

Abstract P-type ATPases transport ions across biological membranes against concentration gradients and are essential for all cells. They use the energy from ATP hydrolysis to propel large intramolecular movements, which drive vectorial transport of ions. Tight coordination of the motions of the pump is required to couple the two spatially distant processes of ion binding and ATP hydrolysis. Here, we review our current understanding of the structural dynamics of P-type ATPases, focusing primarily on Ca2+ pumps. We integrate different types of information that report on structural dynamics, primarily time-resolved fluorescence experiments including single-molecule Förster resonance energy transfer and molecular dynamics simulations, and interpret them in the framework provided by the numerous crystal structures of sarco/endoplasmic reticulum Ca2+-ATPase. We discuss the challenges in characterizing the dynamics of membrane pumps, and the likely impact of new technologies on the field.

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