scholarly journals A Class of Methods for the Analysis of Blade Tip Timing Data from Bladed Assemblies Undergoing Simultaneous Resonances—Part II: Experimental Validation

2007 ◽  
Vol 2007 ◽  
pp. 1-10 ◽  
Author(s):  
J. Gallego-Garrido ◽  
G. Dimitriadis ◽  
I. B. Carrington ◽  
J. R. Wright
Keyword(s):  
Experimental Test ◽  
Experimental Validation ◽  
Test Rig ◽  
New Techniques ◽  
Analysis Techniques ◽  
Simultaneous Resonances ◽  
Timing Data ◽  
Blade Tip ◽  
Using Data ◽  
Double Resonances

Blade tip timing is a technique for the measurement of vibrations in rotating bladed assemblies. In Part I of this work a class of methods for the analysis of blade tip timing data from bladed assemblies undergoing two simultaneous synchronous resonances was developed. The approaches were demonstrated using data from a mathematical simulation of tip timing data. In Part II the methods are validated on an experimental test rig. First, the construction and characteristics of the rig will be discussed. Then, the performance of the analysis techniques when applied to data from the rig will be compared and analysed. It is shown that accurate frequency estimates are obtained by all the methods for both single and double resonances. Furthermore, the recovered frequencies are used to calculate the amplitudes of the blade tip responses. The presence of mistuning in the bladed assembly does not affect the performance of the new techniques.

scholarly journals A Class of Methods for the Analysis of Blade Tip Timing Data from Bladed Assemblies Undergoing Simultaneous Resonances—Part I: Theoretical Development

2007 ◽  
Vol 2007 ◽  
pp. 1-11 ◽  
Author(s):  
J. Gallego-Garrido ◽  
G. Dimitriadis ◽  
J. R. Wright
Keyword(s):  
Vibration Frequency ◽  
Simulated Data ◽  
Theoretical Development ◽  
Simultaneous Resonances ◽  
Timing Data ◽  
Blade Tip

Blade tip timing is a technique for the measurement of vibrations in rotating bladed assemblies. Although the fundamentals of the technique are simple, the analysis of data obtained in the presence of simultaneously occurring synchronous resonances is problematic. A class of autoregressive-based methods for the analysis of blade tip timing data from assemblies undergoing two simultaneous resonances has been developed. It includes approaches that assume both sinusoidal and general blade tip responses. The methods can handle both synchronous and asynchronous resonances. An exhaustive evaluation of the approaches was performed on simulated data in order to determine their accuracy and sensitivity. One of the techniques was found to perform best on asynchronous resonances and one on synchronous resonances. Both methods yielded very accurate vibration frequency estimates under all conditions of interest.

Upaya Meningkatkan Efikasi Diri Melalui Layanan Bimbingan Konseling

2020 ◽  
Vol 3 (1) ◽  
pp. 48-59
Author(s):  
Nona Nurfadhilla
Keyword(s):  
Self Efficacy ◽  
Counseling Services ◽  
Guidance And Counseling ◽  
School Work ◽  
Analysis Techniques ◽  
Qualitative Descriptive ◽  
Doing School ◽  
Good Learning ◽  
Using Data ◽  
Collection Methods

This article aims to look at how to improve self-efficacy through guidance and counseling services at SMP 1 Pleret, Yogyakarta. This type of research is qualitative descriptive, data collection methods through interviews and observations. Data analysis techniques using data reduction, data presentation and drawing conclusions. Results and discussion that there are still many students who have low self-efficacy so they are difficult to achieve good learning outcomes. This is proven by some students rarely doing school work and rarely doing homework also do not have the motivation to excel. BK teachers try through guidance and counseling services in the form of a preventive approach for those with high self-efficacy and a curative approach for students with low self-efficacy. Such as helping students to convince themselves that students are able to do tasks even though it is difficult and able to excel and to convince students to avoid feeling inferior about themselves. Guidance and counseling provided by BK teachers shows significant changes in some students who already have high self-efficacy. So it can be concluded that through guidance and counseling can be an effort to improve student self-efficacy.

PROSES KOMUNIKASI KELOMPOK DALAM METODE PEMBELAJARAN SENTRA UNTUK MEMBENTUK KEMANDIRIAN ANAK

Jurnal Common ◽  
2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Rismawaty Rismawaty ◽  
Sofie Aulia Rahmah
Keyword(s):  
Data Collection ◽  
Qualitative Method ◽  
Group Communication ◽  
Communication Process ◽  
Learning Method ◽  
Online Data ◽  
Analysis Techniques ◽  
Collection Data ◽  
Descriptive Approach ◽  
Using Data

Penelitian ini dilakukan untuk mengetahui proses komunikasi kelompok dalam metode pembelajaran sentra di TK Zaid bin Tsabit. Penelitian ini mendiskusikan tentang proses komunikasi kelompok. Metode penelitian yang digunakan dalam penelitian ini adalah Metode Kualitatif dengan pendekatan Deskriptif. Teknik pengumpulan data yang dilakukan peneliti ada dengan studi pustaka, penelusuran data secara online, wawancara, observasi serta dokumentasi dengan 3 orang informan kunci yaitu guru di TK Zaid bin Tsabit serta 3 informan pendukung yaitu Kepala TK Zaid bin Tsabit dan 2 orang tua murid. Uji keabsahan data dengan peningkatan ketekunan, triangulasi dan diskusi dengan teman sejawat, teknik analisis data menggunakan pengumpulan data, reduksi data, penyajian data, penarikan kesimpulan dan evaluasi.Hasil penelitian ini bahwa Proses komunikasi yang terjadi merupakan komunikasi langsung yang terjadi dua arah dan dilakukan terus menerus untuk membentuk kemandirian anak. Proses komunikasi yang terjadi dalam kelompok metode pembelajaran sentra membentuk kemandirian anak. Proses komunikasi yang dilakukan oleh guru kepada anak dilakukan dengan memberikan arahan-arahan kepada anak serta contoh dari arahan yang telah disampaikan oleh guru.Kesimpulan pada penelitian ini adalah metode pembelajaran sentra membentuk kemandirian anak lewat komunikasi yang dilakukan guru secara terus menerus, karna melalui pembelajaran sentra anak diminta untuk melakukan segala sesuatunya sendiri dalam pengawasan guru. Saran yang diberikan adalah guru harus lebih kreatif dalam memberikan materi pada metode pembelajaran sentra serta bersikap lebih tegas dalam mendidik anak dan melakukan komunikasi yang berkelanjutan dengan orang tua murid. --------------------------------------------------------------------------------- This study was conducted to determine the process of group communication in the center learning method at TK Zaid bin Tsabit. This study discusses the process of group communication. The research method used in this study is a qualitative method with a descriptive approach. The data collection techniques carried out by the researcher were with literature studies, online data searches, interviews, observation and documentation with 3 key informants namely the teacher at TK Zaid bin Tsabit and 3 supporting informants namely TK Head Zaid bin Tsabit and 2 parents. Test the validity of data by increasing perseverance, triangulation and discussion with colleagues, data analysis techniques using data collection, data reduction, data presentation, drawing conclusions and evaluations.The results of this study that the communication process that occurs is direct communication that occurs in two directions and carried out continuously to form the independence of children. The communication process that occurs in a group of central learning methods shapes children's independence. The process of communication carried out by the teacher to the child is done by giving directions to the child as well as examples of directions that have been delivered by the teacher.The conclusion of this study is that the central learning method shapes children's independence through continuous communication by the teacher, because through central learning children are asked to do everything themselves in the supervision of the teacher. The advice given is that the teacher must be more creative in giving material to the central learning method and be more assertive in educating children and making ongoing communication with parents.

New Rapid Failure Analysis Techniques for Multilevel Metallization

MRS Bulletin ◽  
1995 ◽  
Vol 20 (11) ◽  
pp. 74-77
Author(s):  
Edward I. Cole ◽  
Richard E. Anderson
Keyword(s):  
Integrated Circuits ◽  
Product Development ◽  
Failure Analysis ◽  
New Product Development ◽  
New Product ◽  
Electronics Industry ◽  
New Techniques ◽  
Analysis Techniques ◽  
Advantages And Disadvantages ◽  
Failure Site

Open interconnections on integrated circuits (ICs) are a serious and ubiquitous problem throughout the micro-electronics industry. The efforts to understand the mechanisms responsible for producing open interconnections and to develop analytical methods to localize them demonstrate the concern manufacturers have for this problem. Multiple layers of metallization not only increase the probability that an open conductor or via will occur because of the increased number of interconnections and vias but also increase the difficulty in localizing the site of the failure because upper layers may mask the failure site.Rapid failure analysis of open-conductor defects is critical in new product development and reliability assessment of ICs where manufacturing and product development delays can cost millions of dollars a day. In this article, we briefly review some standard failure analysis approaches and then concentrate on new techniques to rapidly locate open-conductor defects that would have been difficult or impossible to identify using earlier methods. Each method is described in terms of the physics of signal generation, application, and advantages and disadvantages when compared to existing methods.

Sparse Reconstruction Method of Non-Uniform Sampling and its Application in Blade Tip Timing System

2020 ◽  
Author(s):  
Jie Tian ◽  
Xiaopu Zhang ◽  
Yong Chen ◽  
Peter Russhard ◽  
Hua Ouyang
Keyword(s):  
Compressive Sensing ◽  
Sparse Reconstruction ◽  
Reconstruction Method ◽  
Blade Vibration ◽  
Uniform Sampling ◽  
Blade Vibrations ◽  
Timing Data ◽  
Blade Tip ◽  
Simultaneous Identification ◽  
Multi Mode

Abstract Based on the blade vibration theory of turbomachinery and the basic principle of blade timing systems, a sparse reconstruction model is derived for the tip timing signal under an arbitrary sensor circumferential placement distribution. The proposed approach uses the sparsity of the tip timing signal in the frequency domain. The application of compressive sensing in reconstructing the blade tip timing signal and monitoring multi-mode blade vibrations is explored. To improve the reconstruction effect, a number of numerical experiments are conducted to examine the effects of various factors on synchronous and non-synchronous signals. This enables the specific steps involved in the compressive sensing reconstruction of tip timing signals to be determined. The proposed method is then applied to the tip timing data of a 27-blade rotor. The results show that the method accurately identifies the multi-mode blade vibrations at different rotation speeds. The proposed method has the advantages of low dependence on prior information, insensitivity to environmental noise, and simultaneous identification of synchronous and non-synchronous signals. The experimental results validate the effectiveness of the proposed approach in engineering applications.

MANAJEMEN SANGGAR SENI TARI TRADISIONAL DINDA BESTARI DI KOTA PALEMBANG

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Nurdin Nurdin
Keyword(s):  
Contemporary Dance ◽  
Only Children ◽  
Analysis Techniques ◽  
Traditional Dance ◽  
Data Validity ◽  
Using Data ◽  
Management Functions ◽  
The City ◽  
Assess Data Quality ◽  
Analyze Data

Dinda Bestari Traditional Dance Studio is a dance studio that teaches traditional dance, dance creation and contemporary dance. The studio also teaches children's dance and opens special classes for children. In this studio, students who are not only children and adolescents, but there are also adults. This research aims to describe the management of Dinda Bestari Traditional Dance Studio, which is domiciled in the City of Palembang, South Sumatra, which implements management functions in all aspects of studio activities including planning , organizing, implementing and controlling. This research applies a qualitative approach. The research subject is myself as the owner, founder and at the same time the manager of this studio. The object of this research is the Dinda Bestari Traditional Dance Studio in Palembang which includes, its background and management system applied. Data collection techniques carried out in three ways, namely participant observe, interview and documentation. In this study using a human instrument that is the researcher himself who acts as an instrument, serves to determine the focus of research, choose informants as sources of data, collect data, assess data quality, analyze data, interpret data, and make conclusions on its findings. Data analysis techniques using data reduction, data description and conclusion drawing. The data validity test in this study uses the data triangulation method. The results of this study describe that the Dinda Bestari Traditional Dance Studio uses management functions as (1) planning, (2) organizing, (3) acting (Actuating), and (4) controlling (Controlling).

scholarly journals Modelling and experimental validation of active and passive eddy current sensors for blade tip timing

2019 ◽  
Vol 285 ◽  
pp. 98-110 ◽  
Author(s):  
Nidhal Jamia ◽  
Michael I. Friswell ◽  
Sami El-Borgi ◽  
Prakash Rajendran
Keyword(s):  
Eddy Current ◽  
Experimental Validation ◽  
Blade Tip ◽  
Current Sensors

scholarly journals Strategi Humas Universitas Negeri Makassar Dalam Meningkatkan Citra Positif Masyarakat

2019 ◽  
Vol 5 (2) ◽  
pp. 99
Author(s):  
Risma Niswaty ◽  
Sri Wulandari ◽  
Sirajuddin Saleh ◽  
Muh. Rizal S
Keyword(s):  
Data Analysis ◽  
Public Relations ◽  
Mutual Understanding ◽  
State University ◽  
Data Presentation ◽  
The Public ◽  
Analysis Techniques ◽  
Descriptive Research ◽  
Qualitative Descriptive ◽  
Using Data

This study aims to determine the public relations strategy of Makassar State University in increasing the positive image of Makassar State University in the community. To find out these objectives, the researchers used a type of qualitative descriptive research. The informants in this study were as many as five people using data collection techniques carried out through observation, interviews and documentation. Data obtained from research results are processed using data analysis techniques consisting of data reduction, data presentation and conclusion drawing. The results showed that Public Relations devised a strategy so that the function could run in accordance with the objectives of Makassar State University, among others, trying to create a conducive climate between institutions and the public in order to do persuasive and educative approaches to the public, trying to create two-way communication by disseminating information from institutions to public parties. educate and provide information, in order to create mutual understanding, respect, understanding and also strive to foster harmonious relations between organizations and various groups, both in and out relations to enhance cooperation. Public Relations seeks to socialize the Makassar State University mission to be accepted or received support from the public / public.

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