The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2024
Filed:
Jul. 26, 2021
Dalian University of Technology, Liaoning, CN;
DALIAN UNIVERSITY OF TECHNOLOGY, Dalian, CN;
Abstract
The present invention belong to the technical field of lattice tower structure monitoring, and discloses a displacement reconstruction method for a lattice tower structure based on improved mode superposition. The method comprises: uniformly arranging D strain sensors on main member of a lattice tower along the height, processing collected strain data {ε}using a stochastic subspace identification (SSI) method to obtain a matrix [Ψ]of first n-order strain modes; calculating a function relation y(x) between a distance from a measuring point to a neutral layer and a height according to a lattice tower design drawing; performing polynomial fitting on the first n-order strain modes with a height coordinate x of the lattice tower respectively to obtain a strain mode function Ψ(x), expanding a function according to a Taylor formula, performing double integration on the expansion result and substituting same into a boundary condition, to obtain a displacement mode function Φ(x); evaluating a modal coordinate {q}by means of the least square method, substituting the height coordinate x of a displacement object point to be reconstructed, and multiplying the displacement mode function value Φ(x) by the modal coordinate {q}. The improved mode superposition method of the present invention has the advantages of a small number of sensors required, simple calculation process, accurate calculation result, and strong operability and practicality.