This paper presents the comparison of two different methods in the system identification. The experimental modal analysis and operational modal analysis are applied to a local structure of a storage/retrieval machine (S/R machine). The different vibration measurement approach and different theoretic analysis approach give us more information than only one approach. Through the result, the consi...

The notion of a critical successor [dJV90] has been central to all modal completeness proofs in interpretability logics. In this paper we shall work with an alternative notion, that of an assuring successor. As we shall see, this makes life a lot easier. After a general treatment of assuringness, we shall apply it to obtain a completeness results for ILW, a result first proved by de Jongh and V...

The present production study shows that information structure is prosodically expressed in several parallel ways in Finnish. In addition to producing words in narrow focus with (1) a larger duration, (2) higher f0 peaks and greater falls, and (3) an earlier and more consistent peak alignment, participants frequently marked these words using also (4) pauses and (5) non-modal voice quality. Furth...

Ear biometric for identification of human is quite complex task. It’s use either uni-modal or multi-modal approach in order to authenticate a person. A uni-modal biometric system involves a single source of biometric to identify a person. This paper is based on uni-modal approach with ear as a biometric trait for recognizing a person. In this paper, an experimental approach is used for identify...

Operational modal analysis deals with the estimation of modal parameters using vibration data obtained from unknown or ambient excitation sources in operational rather than laboratory conditions. The paper compares three operational modal parameter identification approaches for identifying modal parameters of a multi-span concrete motorway bridge when subjected to either ambient or broad-band l...

The modal characterization of automotive lighting systems becomes difficult using sensors due to the light weight of the elements which compose the component as well as the intricate access to allocate them. In experimental modal analysis, high speed 3D digital image correlation (HS 3D-DIC) is attracting the attention since it provides full-field contactless measurements of 3D displacements as ...

System identification plays a crucial role in structural dynamics and vibro-acoustic system optimization. The followed approach is based on the “Modal Analysis” concept. The Eigenmodes of the system model can be visualized and allow a direct physical interpretation. Using the modal models, design improvements can be predicted and the structure optimized. The present paper not only reviews the t...

Abstract: Modal analysis is a powerful technique for understanding the behavior and performance of structures. Modal analysis can be conducted via artificial excitation, e.g. shaker or instrument hammer excitation. Input force and output responses are measured. That is normally referred to as experimental modal analysis (EMA). EMA consists of three steps: data acquisition, system identificatio...