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Hasil Pencarian

Ditemukan 149 dokumen yang sesuai dengan query
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Javad Mohammadpour, editor
"Control of linear parameter varying systems compiles state-of-the-art contributions on novel analytical and computational methods for addressing system identification, model reduction, performance analysis and feedback control design and addresses address theoretical developments, novel computational approaches and illustrative applications to various fields. Part I discusses modeling and system identification of linear parameter varying systems, part II covers the importance of analysis and control design when working with linear parameter varying systems (LPVS) , Finally, part III presents an applications based approach to linear parameter varying systems, including modeling of a turbocharged diesel engines, Multivariable control of wind turbines, modeling and control of aircraft engines, control of an autonomous underwater vehicles and analysis and synthesis of re-entry vehicles."
New York: [Springer, ], 2012
e20418299
eBooks  Universitas Indonesia Library
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"Nonlinear systems and methods for mechanical, electrical and biosystems presents topics observed at the 3rd Conference on Nonlinear Science and Complexity(NSC), focusing on energy transfer and synchronization in hybrid nonlinear systems. The studies focus on fundamental theories and principles,analytical and symbolic approaches, computational techniques in nonlinear physical science and mathematics. Broken into three parts, the text covers, parametrical excited pendulum, nonlinear dynamics in hybrid systems, dynamical system synchronization and (N+1) body dynamics as well as new views different from the existing results in nonlinear dynamics, mathematical methods for dynamical systems including conservation laws, dynamical symmetry in nonlinear differential equations and invex energies and nonlinear phenomena in physical problems such as solutions, complex flows, chemical kinetics, Toda lattices and parallel manipulator."
New York: Springer, 2012
e20418465
eBooks  Universitas Indonesia Library
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Jason J. Gorman, editor
"Control from MEMS to atoms illustrates the use of control and control systems as an essential part of functioning integrated systems. The book is organized according to the dimensional scale of the problem, starting with micro-scale systems and ending with atomic-scale systems. Similar to macro-scale machines and processes, control systems can play a major role in improving the performance of micro- and nano-scale systems and in enabling new capabilities that would otherwise not be possible. However, the majority of problems at these scales present many new challenges that go beyond the current state-of-the-art in control engineering. This is a result of the multidisciplinary nature of micro/nanotechnology, which requires the merging of control engineering with physics, biology and chemistry."
New York: [, Springer], 2012
e20418618
eBooks  Universitas Indonesia Library
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"Topics in experimental dynamics substructuring and wind turbine dynamics, volume 2, proceedings of the 30th IMAC, a Conference and Exposition on Structural Dynamics, 2012, the second volume of six from the Conference, brings together 31 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of structural dynamics."
New York: Springer, 2012
e20418826
eBooks  Universitas Indonesia Library
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"Topics in Modal analysis I, volume 5 : proceedings of the 30th IMAC, a conference and Exposition on Structural Dynamics, 2012, the fifth volume of six from the Conference, brings together 53 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on, modal parameter identification, damping of materials and members, new methods, structural health monitoring, processing modal data, operational modal analysis, damping, excitation methods, active control, damage detection for civil structures, and system identification."
New York: Springer, 2012
e20418829
eBooks  Universitas Indonesia Library
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Kuznetsov, Sergey P.
"This book presents recent progress on uniformly hyperbolic attractors in dynamical systems from a physical rather than mathematical perspective (e.g. the Plykin attractor, the Smale – Williams solenoid). The structurally stable attractors manifest strong stochastic properties, but are insensitive to variation of functions and parameters in the dynamical systems. Based on these characteristics of hyperbolic chaos, this monograph shows how to find hyperbolic chaotic attractors in physical systems and how to design a physical systems that possess hyperbolic chaos. "
Heidelberg : [Springer, ], 2012
e20425079
eBooks  Universitas Indonesia Library
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Muhammad Haekal Habibie
"ABSTRAK
Sistem pemberi getaran artificial dinamakan vibration exciter merupakan suatu sistem yang digunakan untuk memberikan getaran yang terkendali sehingga menghasilkan frekuensi dan akselerasi tertentu. Vibration exciter digunakan untuk kegiatan pengujian, pengukuran dan kalibrasi terkait lingkup getaran. Vibration exciter yang dijual di pasaran memiliki harga yang tinggi dan memerlukan pengetahuan teknis yang memadai. Oleh karena itu tujuan dilakukannya penelitian adalah untuk melakukan rancang bangun vibration exciter yang sederhana dan low cost tanpa mengurangi fungsinya. Penelitian dilakukan dengan membuat sistem mekanik dari vibration exciter yang komponen utamanya terdiri atas meja getar, linear motion guide, connecting rod, tiang penyangga dan base. Pada penelitian ini juga dilakukan perancangan sistem elektronika sebagai aktuator gerakan dari sistem mekanik yang terdiri atas mikrokontroler, motor DC, dan motor driver. Rentang ukur frekuensi dari vibration exciter yang diharapkan dapat terealisasi adalah 0.1 Hz s.d 1 Hz. Pengukuran frekuensi dan akselerasi dilakukan dengan menggunakan sensor accelerometer serta pengkondisi sinyal dan penganalisa sinyal untuk mendapatkan spektrum getaran dari vibration exciter. Dari hasil penelitian dapat diperoleh informasi bahwa nilai frekuensi getar yang didapatkan berkisar antara 43.575 milihertz s.d 425.99 milihertz sedangkan nilai akselerasi getar yang didapatkan berada pada rentang ukur 2.9560 mm/s2 s.d. 3405.74 mm/s2. Hasil lainnya adalah nilai ketidakpastian pengukuran dari vibration exciter adalah 2.1% sampai dengan 4.0% dari nilai nominal frekuensi dan 4.2% sampai dengan 20% dari nilai nominal akselerasi.

ABSTRACT
System providers artificial vibration is called vibration exciter is a system used to provide vibration control that produces certain frequencies and acceleration. Vibration exciter used for testing, measurement and calibration related to the scope of vibration. Vibration exciter on the market has a high price and requires sufficient technical knowledge. Therefore, the objective of the research is to design vibration exciter that is simple and low cost without compromising function. Research carried out by making the mechanical system of the vibration exciter whose main components consist of a vibration table, linear motion guide, connecting rod, pillars and base. This research design electronic systems as the actuator movement of the mechanical system that consists of a microcontroller, DC motors, and motor driver. Range of measuring the frequency of the vibration exciter are expected to be realized is 0.1 Hz to 1 Hz. Measurement of frequency and acceleration is done using accelerometer sensor, signal conditioning and pulse analyzers to obtain vibration spectrum of the vibration exciter. From the research results can be obtained information that the vibrating frequency values ​​obtained ranged between 43 575 milihertz to 425.99 milihertz while vibrating acceleration values ​​obtained were in the range of measuring 2.9560 mm/s2 s.d. 3405.74 mm/s2. Another result is the value of the measurement uncertainty of vibration exciter is 2.1% to 4.0% of the nominal value of frequency and 4.2% to 20% of the "
2016
T45795
UI - Tesis Membership  Universitas Indonesia Library
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Putri Rahmawati
"ABSTRAK
Pemantauan getaran vibration monitoring merupakan metode yang masih digunakan sampai sekarang bahkan selalu berkembang dari waktu kewaktu. Metode ini sangat dibutuhkan di industri karena dengan metode ini dapat mengurangi biaya jika terjadi kerusakan pada mesin di industri serta dengan metode ini perawatan pada mesin lebih baik. Pada penelitian ini, telah dikembangkan sebuah sistem untuk mendeteksi kerusakan komponen pada mesin pompa air diantaranya komponen kapasitor, bearing dan impeller. Kerusakan dideteksi dengan mengambil data getaran menggunakan akselerometer MEMS. Data keluaran akselerometer diakuisisi dengan menggunakan mikrokomputer Raspberry Pi kemudian data tersebut diubah dalam bentuk Relative Power Ratio RPR dimana data dalam bentuk ini akan dipelajari oleh Artificial Neural Network ANN dengan begitu kerusakan dapat dideteksi dimana hasil pengujian kerusakan akan dikirim melalui pesan text menggunakan modul GSM. Hasil pengujian dari penelitian ini, dengan pembacaan kerusakan selama 10 kali dalam 10 menit, semua kasus kecuali kasus kapasitor rusak menghasilkan 100 sedangkan untuk kasus kapasitor rusak menghasilkan 90 akurasi kerusakan. Pengujian dilakukan pada mesin pompa air Shimizu PS-128 BT dan dilakukan di Universitas Indonesia.

ABSTRACT
Vibration monitoring is a method that is still used today even always evolving from time to time. This method is very needed in the industry because with this method can reduce the cost if there is damage to the machine in the industry as well as with this method of maintenance on the machine more better. In this research, a system has been developed to detect the damage of components in water pump machine such as capacitor, bearing and impeller . Damage detected by taking vibration data using MEMS accelerometer. The accelerometer output data is acquired using Raspberry Pi microcomputer then the data is converted in the form of Relative Power Ratio RPR where the data in this form will be studied by Artificial Neural Network ANN so detectable damage where the damage test result will be sent via text message using GSM module. Test results from this study, with a 10 times damage reading in 10 minutes, all cases except the case of defective capacitor yield 100 while for the case the defective capacitor yields 90 damage accuracy. The test was performed on the Shimizu PS 128 BT water pump machine and performed at the University of Indonesia."
2017
S69823
UI - Skripsi Membership  Universitas Indonesia Library
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Irfan Meison Hardi
"Latar Belakang: Pemasangan Peripheral Intravenous Catheter (PIVC) merupakan prosedur invasif terbanyak yang dilakukan di rumah sakit dan merupakan prosedur yang paling sering menyebabkan rasa nyeri pada pasien. Prosedur yang berkaitan dengan jarum akan menyebabkan kecemasan, rasa takut dan trauma pada pasien, baik pasien anak maupun dewasa. EMLA merupakan campuran antara krim lidokain dan prilokain yang dicampurkan dengan perbandingan 1:1 (2.5% : 2.5%), akan menghasilkan campuran eutektik. Banyak penelitian klinis yang menyatakan bahwa EMLA memiliki efek analgesia pada prosedur pungsi vena dan pemasangan PIVC baik pada pasien anak maupun dewasa. VAD dikembangkan berdasarkan teori gate-control of pain yang bekerja dengan cara menimbulkan sensasi getar pada kulit yang akan menurunkan atau menghilangkan transmisi nyeri ke otak.
Metode: Penelitian ini adalah uji eksperimental tidak tersamar pada pasien yang akan direncanakan menjalani pembedahan mata di kamar operasi Kirana RSUPN dr. Cipto Mangunkusumo selama bulan September-Oktober 2018. Sebanyak 56 subjek diambil dengan metod consecutive sampling dan dibagi ke dalam 2 kelompok. Pasien secara acak dilakukan pemasangan PIVC dengan bantuan Vibration Anesthesia Device (VAD) atau dengan krim campuran eutektik (EMLA). Keefektifan akan dinilai dari skala nyeri visual analog scale (VAS) nyeri dan perbedaan frekuensi nadi sebelum dan sesudah dilakukan tindakan. Analisis data dilakukan dengan uji T dan Mann Whitney.
Hasil: Tidak terdapat perbedaan bermakna dalam skala VAS yang dilaporkan oleh subjek dari kelompok VAD 13.65 (10.25-18.17) dan EMLA 12.57 (8.97-17.61) dengan nilai p=0.706. Perubahan frekuensi nadi antara kedua kelompok juga menunjukkan adanya perbedaan yang tidak signifikan (p=0,557). Namun, didapatkan peningkatan frekuensi nadi yang lebih tinggi pada kelompok VAD 2 (-3 -19 ) dibandingkan kelompok EMLA 2 (-3 -16 ).
Simpulan: VAD sama efektif dibandingkan dengan EMLA dalam mengurangi nyeri pada pemasangan Peripheral Intravenous Catheter (PIVC)

Background: Peripheral Intravenous Catheter (PIVC) is the most invasive procedure carried out in a hospital and is the procedure that most often causes pain in patients. Needle-related procedures will cause anxiety, fear and trauma in patients, both pediatric and adult patients. EMLA is a mixture of lidocaine cream and prilocaine mixed with a ratio of 1: 1 (2.5%: 2.5%), which will produce an eutectic mixture. Many clinical studies have stated that EMLA has analgesic effects on venous puncture procedures and the insertion of PIVC in both pediatric and adult patients. VAD was developed based on the gate-control of pain theory that works by causing a vibrating sensation on the skin which will reduce or eliminate pain transmission to the brain.
Methods: This is an experimental study that is not disguised in patients who are planned to undergo eye surgery in the Kirana operating room, Dr. Cipto Mangunkusumo hospital during September-October 2018. A total of 56 subjects were taken by consecutive sampling method and divided into 2 groups. Patients were randomly assigned to PIVC insertion with Vibration Anesthesia Device (VAD) or with eutectic mixed cream (EMLA). Effectiveness will be assessed from pain visual analog scale (VAS) and heart rate frequency differences before and after insertion. Data analysis was performed by T-Test and Mann Whitney test.
Results: There were no significant differences in the VAS scale reported by subjects from the VAD group 13.65 (10.25 -18.17) mm and EMLA group 12.57 (8.97-17.61) mm with p = 0.706. Changes in pulse frequency between the two groups also showed no significant differences (p = 0.557). However, there was a higher increase in pulse frequency in the VAD 2 group (-3 -19) compared to the EMLA 2 group (-3 -16).
Conclusion: VAD is equally effective compared to EMLA in reducing pain in Peripheral Intravenous Catheter (PIVC) insertion."
Jakarta: Fakultas Kedokteran Universitas Indonesia, 2018
SP-pdf
UI - Tugas Akhir  Universitas Indonesia Library
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Syahbani Rizkivaldy
"ABSTRAK
Motor bakar diesel biasa digunakan untuk kendaraan berdimensi besar karena diperlukan tenaga yang besar. Selain mengeluarkan tenaga yang besar kendaraan bermotor bakar diesel dikenal dengan getaran dan juga kebisingan yang besar. Jika kendaraan kecil menggunakan motor berbahan bakar diesel maka getaran dan kebisingan yang dihasilkan akan lebih besar daripada motor bakar otto biasa. Sedangkan pada kendaraan kecil seperti sedan salah satu faktor yang dipertimbangkan untuk menggunakan mobil tersebut adalah faktor kenyamanan. Getaran dan kebisingan yang ditimbulkan bisa menjadi faktor yang menggangu kenyamanan bila melewati batas yang telah ditentukan. Pada penelitian ini penulis mengambil data getaran dan kebisingan pada titik tertentu yang telah ditentukan dengan metode Transfer path analysis. Hasil dari pengambilan data tersebut akan dibandingkan dengan standar yang telah ditentukan oleh ISO dan juga Kementrian Lingkungan Hidup tentang batas baku getaran dan kebisingan.

ABSTRACT
Diesel engine is commonly used for large dimensional vehicles because it requires a lot of power. Besides known for releasing a large amount of power, diesel engine known as produce a high vibration and noise. If a small vehicle such as city car uses a diesel engine then the vibration and noise generated will be larger than the usual otto engine. While on a small vehicle like a city car, one factor that is considered by consumer to use the car is a comfortable factor. Vibration and noise can be a factor that disturbs comfort when it exceeds a predetermined limit. In this research the writer take the data of vibration and noise at certain point which have been determined by Transfer Path Analysis method. The results of the data retrieval will be compared with the standards specified by the ISO as well as the Ministry of the Environment concerning the vibration and noise standard limits."
2018
S-Pdf
UI - Skripsi Membership  Universitas Indonesia Library