Abstract: A vibration power generation device, comprising: three power generation mechanisms with energy harvesting directions the same as three directions of three-dimensional coordinates, each of the power generation mechanisms including a piezoelectric power generation part and a magnetoelectric power generation part, wherein the piezoelectric power generation part includes two M-shaped structural beams and a first permanent magnet fixed in the middle of each of the M-shaped structural beams; and the magnetoelectric power generation part includes two magnetoelectric power generation components that are arranged on both sides of the piezoelectric power generation part and are in the same axial direction as the two first permanent magnets, and each of the magnetoelectric power generation components includes a second permanent magnet, a spring with one end connected to the second permanent magnet, a sleeve that houses the second permanent magnet in a cavity, and a coil wound on a surface of the sleeve.

Abstract: A method for performing modal analysis on a structure includes the steps of dividing the structure into a plurality of layers each having an individual centroid; determining a movement of a testing point on each layer with respect to the individual centroid of the plurality of layers, wherein the testing point is at a predetermined distance from the individual centroid along a testing plane; and processing the movement of the testing point on each layer to determine a modal response of the structure. A system for performing modal analysis on a structure includes a movement detection module and a processing module for carrying out the method.

Abstract: A method for performing modal analysis on a structure includes the steps of dividing the structure into a plurality of layers each having an individual centroid; determining a movement of a testing point on each layer with respect to the individual centroid of the plurality of layers, wherein the testing point is at a predetermined distance from the individual centroid along a testing plane; and processing the movement of the testing point on each layer to determine a modal response of the structure. A system for performing modal analysis on a structure includes a movement detection module and a processing module for carrying out the method.