Výsledky vyhledávání - "Chan Kyu Choi"

Stochastic modeling and vibration analysis of rotating beams considering geometric random fields

Autor: Hong Hee Yoo, Chan Kyu Choi

Publikováno v: Journal of Sound and Vibration. 388:105-122

Geometric parameters such as the thickness and width of a beam are random for various reasons including manufacturing tolerance and operation wear. Due to these random parameter properties, the vibration characteristics of the structure are also rand

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8743db0893b8491d104adf0bacfb0aec
https://doi.org/10.1016/j.jsv.2016.10.030

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Stochastic inverse method to identify parameter random fields in a structure

Autor: Chan Kyu Choi, Hong Hee Yoo

Publikováno v: Structural and Multidisciplinary Optimization. 54:1557-1571

The parameters in a structure such as geometric and material properties are generally uncertain due to manufacturing tolerance, wear, fatigue and material irregularity. Such parameters are random fields because the uncertain properties vary along the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a05c99868826356e458c954ef234cde
https://doi.org/10.1007/s00158-016-1534-y

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Identification of location and size of a defect in a structural system employing active external excitation and hybrid feature vector components in HMM

Autor: Chan Kyu Choi, Jong Su Kim, Hong Hee Yoo

Publikováno v: Journal of Mechanical Science and Technology. 30:2427-2433

For the fault diagnosis of a mechanical system, various kinds of methods have been developed so far. For a structural system having a defect, pattern recognition methods such as Hidden Markov model (HMM) and Artificial neural network (ANN) are widely

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f0ba179ad1cd489bfc2979bc99e41f58
https://doi.org/10.1007/s12206-016-0502-1

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Fault Diagnosis of Rotating System Mass Unbalance Using Hidden Markov Model

Autor: Jinho Park, To Kang, Chan-Kyu Choi, Soon-Woo Han, Hong Hee Yoo, Jungmin Ko

Publikováno v: Transactions of the Korean Society for Noise and Vibration Engineering. 25:637-643

In recent years, pattern recognition methods have been widely used by many researchers for fault diagnoses of mechanical systems. The soundness of a mechanical system can be checked by analyzing the variation of the system vibration characteristic al

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41094e2b0f94f7aec9b2ac3ffc1f581d
https://doi.org/10.5050/ksnve.2015.25.9.637

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Stochastic modeling of friction force and vibration analysis of a mechanical system using the model

Autor: Chan Kyu Choi, Won Seok Kang, Hong Hee Yoo

Publikováno v: Journal of Mechanical Science and Technology. 29:3645-3652

The squeal noise generated from a disk brake or chatter occurred in a machine tool primarily results from friction-induced vibration. Since friction-induced vibration is usually accompanied by abrasion and lifespan reduction of mechanical parts, it i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e9aeed57a05ecf239609ef315bb44f1
https://doi.org/10.1007/s12206-015-0808-4

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Robust Design in Multibody Dynamics – Application to Vehicle Ride-comfort Optimization

Autor: Hong Hee Yoo, Christian Soize, Chan Kyu Choi, Anas Batou

Publikováno v: Procedia IUTAM
IUTAM Symposium on Dynamical Analysis of Multibody Systems with Design Uncertainties
IUTAM Symposium on Dynamical Analysis of Multibody Systems with Design Uncertainties, IUTAM, Jun 2014, Stuttgart, Germany. pp.90-97, ⟨10.1016/j.piutam.2015.01.005⟩
Procedia IUTAM, cElsevier, 2015, 13, pp.90-97. ⟨10.1016/j.piutam.2015.01.005⟩
Procedia IUTAM, Elsevier, 2015, 13, pp.90-97. ⟨10.1016/j.piutam.2015.01.005⟩

International audience; This research is devoted to the robust design of multibody dynamical systems, that is to say to the optimal design of a multibody system which is carried out using an uncertain computational model. The probabilistic model of u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f831c0b66180ea3a2f1467d9f685b02
https://doi.org/10.1016/j.piutam.2015.01.005

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Precision fault diagnosis procedure for a structural system having a defect employing Hidden Markov Models

Autor: Chan Kyu Choi, Hong Hee Yoo

Publikováno v: International Journal of Precision Engineering and Manufacturing. 15:1667-1673

Condition-based maintenance (CBM) is one of the most effective maintenance methods since it can minimize operation shutdowns for maintenance. In CBM, a fault diagnosis is conducted using vibration signals caused by various fault types. To analyze sig

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72d0684388c12cd6a1c0be132b0f7932
https://doi.org/10.1007/s12541-014-0517-4

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Application of Excitation Moment for Enhancing Fault Diagnosis Probability of Rotating Blade

Autor: Jong Su Kim, Chan Kyu Choi, Hong Hee Yoo

Publikováno v: Transactions of the Korean Society of Mechanical Engineers A. 38:205-210

Recently, pattern recognition methods have been widely used by researchers for fault diagnoses of mechanical systems. A pattern recognition method determines the soundness of a mechanical system by detecting variations in the system's vibration chara

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d6dbd5be429a38d13c65283daa4c6251
https://doi.org/10.3795/ksme-a.2014.38.2.205

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Manufacturing yield and cost estimation of a MEMS accelerometer based on statistical uncertainty analysis

Autor: Chan Kyu Choi, Yong Il Kim, Hong Hee Yoo

Publikováno v: Journal of Mechanical Science and Technology. 28:429-435

Manufacturing yield maximization to minimize the production cost is one of the most important objectives of manufacturing. The manufacturing yield is the probability to manufacture products that satisfy multiple performance requirements. For a given

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::81c2786931c18a2df6e897f069ad8ac1
https://doi.org/10.1007/s12206-013-1107-6

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Multibody Analysis of a Push-Push Type Mechanism for Micro SIM Card Socket

Autor: Chan Kyu Choi, Ju Chul Kim, Hong Hee Yoo, Jung Kil Sim, Ju Young Yun

Publikováno v: Transactions of the KSME C: Industrial Technology and Innovation. 1:1-6

A SIM card socket is used for a cell phone to fix an USIM card and a push-push mechanism is typically employed in the SIM card socket for a user convenience. A SIM card is inserted with locking when a user pushes the card once and a SIM card is remov

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a17abe9eceb23ec1ea1b0cbb7b5a08b1
https://doi.org/10.3795/ksme-c.2013.1.1.001

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