DESIGN AND OPTIMIZATION OF TUNED MASS DAMPERS TO IMPROVE SETTLING TIME OF A PRECISION OPTICAL SYSTEM

Publication Date

1-1-2023

Document Type

Conference Proceeding

Publication Title

ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)

Volume

6

DOI

10.1115/IMECE2023-114234

Abstract

This paper presents a method of designing and optimizing tuned mass dampers (TMDs) for a precision optical metrology structure using a state-space representation to significantly reduce the design time. The proposed method utilizes a finite element model (FEM) to obtain a solution of an eigen-value problem, which is then used to create a state-space representation of the structure. This state-space representation incorporates a single input single output tuned mass damper in a feedback loop. The state-space model can be iterated many times to determine the optimal tuned mass damper design parameters: location, stiffness, and damping values. The optimal values found are compared to a harmonic finite element solution. The validated approach is then used to find the optimal TMD design parameters for the optical metrology structure. The TMDs are fabricated and installed on the structure. Finally, the attenuation of each mode and total reduction in settling time is presented.

Keywords

settling time reduction, state-space representation, structural damping, Tuned mass damper

Department

Mechanical Engineering

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