Energy Stored in Fractional-Order Elements With Constant Inputs

2015 ◽  
Author(s):  
Tom T. Hartley ◽  
Robert J. Veillette ◽  
Jay L. Adams ◽  
Carl F. Lorenzo
Keyword(s):  
Fractional Order ◽  
Constant Current ◽  
Constant Voltage ◽  
Stored Energy ◽  
Constant Input ◽  
Circuit Element ◽  
Fractional Order Differentiator ◽  
Fractional Order Integrator ◽  
Internal Efficiency ◽  
Charging Efficiency

The internal efficiency of the energy storage in a general fractional-order circuit element is analyzed. By use of distributed-circuit representations, integral expressions are derived for the energy stored in a fractional-order integrator or a fractional-order differentiator for any given profile of the distributed state. For either constant-current or constant-voltage charging, these expressions for the stored energy are evaluated and compared with the energy supplied at the terminals of the element, so that the efficiency of the charging process is determined. The result is found to verify a published conjecture on the constant-input charging efficiency of the fractional-order elements.

HOMOGENITAS PRODUKSI BATERAI ION LITIUM BERDASARKAN VARIANS KAPASITAS PENGISIAN, KAPASITAS PELEPASAN DAN EFISIENSI PENGISIAN-PELEPASAN

2016 ◽  
Vol 6 (1) ◽  
pp. 35
Author(s):  
Daniel Fajar Puspita ◽  
Susanto Sigit Rahardi
Keyword(s):  
Constant Current ◽  
Constant Voltage ◽  
Constant Current Charging

Penelitian  mengenai  stabilisasi  produksi  baterai  ion  litium  berdasarkan  parameter  kapasitas  pengisian, kapasitas pelepasan  dan  efisiensi  pengisian-pelepasan  telah  dilakukan. Tujuan  dari penelitian  ini adalah  untuk mengetahui apakah prosedur pembuatan baterai ion litium ini dapat menghasilkan produk yang homogen. Pada penelitian material selanjutnya hal ini berguna untuk meyakinkan bahwa perubahan kualitas   dari produk baterai yang dihasilkan merupakan pengaruh dari material, bukan karena variabel proses perakitan. Pada penelitian ini dipakai lembaran elektroda siap pakai untuk meniadakan pengaruh variasi bahan baku terhadap kualitas sel baterai yang dihasilkan. Sel baterai dibuat di laboratorium riset baterai B4T. Baterai dibuat sebanyak 3 batch dengan jumlah baterai 8 buah setiap batch. Baterai yang dihasilkan diuji dengan alat battery analyzer merek Berkeley buatan USA dengan arus 0,5 C pada saat constant-current charging dan voltase 4,2 V sewaktu constant-voltage charging selama 10 siklus pada saat uji kinerja  dan arus 0,1 C pada saat pengisian  awal.  Hasil yang didapat adalah  batch C menghasilkan sel-sel baterai yang lebih homogen yang ditandai dengan nilai varians dan simpangan baku yang paling kecil dibandingkan batch lainnya.  Selain itu pada saat uji pengisian-pelepasan  10 siklus, batch C juga memperlihatkan kinerja yang lebih tinggi. Hal ini menunjukkan bahwa proses yang dipakai pada batch C dapat menghasilkan sel baterai ion litium berkinerja baik dan homogen.Kata kunci: stabilisasi produksi, ion litium, kapasitas, efisiensi

Photonic Fractional-Order Differentiator Using an SOI Microring Resonator With an MMI Coupler

2013 ◽  
Vol 25 (15) ◽  
pp. 1408-1411 ◽  
Author(s):  
Hiva Shahoei ◽  
Dan-Xia Xu ◽  
Jens H. Schmid ◽  
Jianping Yao
Keyword(s):  
Fractional Order ◽  
Microring Resonator ◽  
Mmi Coupler ◽  
Fractional Order Differentiator

Bilateral Photoplethysmography Analysis for Peripheral Arterial Stenosis Screening With a Fractional-Order Integrator and Info-Gap Decision-Making

2016 ◽  
Vol 16 (8) ◽  
pp. 2691-2700 ◽  
Author(s):  
Jian-Xing Wu ◽  
Chien-Ming Li ◽  
Yueh-Ren Ho ◽  
Ming-Jui Wu ◽  
Ping-Tzan Huang ◽  
...  
Keyword(s):  
Decision Making ◽  
Fractional Order ◽  
Arterial Stenosis ◽  
Fractional Order Integrator ◽  
Peripheral Arterial

Variable Parameter Processes of Micro-Arc Oxidation for Aluminium Alloy

2011 ◽  
Vol 704-705 ◽  
pp. 1273-1278
Author(s):  
Cheng Gao ◽  
Jin Yong Xu ◽  
Xuan Yi Shi ◽  
Ya Juan Liu ◽  
Jing Chun Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Wear Rate ◽  
Ceramic Coating ◽  
Early Stage ◽  
Variable Parameter ◽  
Ceramic Coatings ◽  
Constant Current ◽  
Constant Voltage ◽  
Micro Arc Oxidation ◽  
The Way

In micro-arc oxidation process, ceramic coating had a rapid growth all along by the way of constant current oxidation, and ceramic coating had a low roughness by the way of constant voltage oxidation. But few research focus on the mixed control process of constant current oxidation and constant voltage oxidation. In this paper we propose a variable parameter process that can combine the advantages of constant current and constant voltage oxidation for the first time. The growth kinetics of different technics was analyzed according to the change law of current and voltage. Surface topographs of ceramic coating were observed using scanning electron microscopy (SEM). The friction tests were carried out using a self-made friction tester. The results show that ceramic coating has an upper growth rate and a low roughness by the process of constant current+constant voltage oxidation. The ceramic coating has a high growth rate by process of constant voltage+constant current oxidation. The results of friction test indicate that the wear rate and roughness of ceramic coating are positive correlation at early stage of friction. While the ceramic coatings treated by different technics have the close wear rate at stable friction stage, which embodies the inner layer of ceramic coating has a well antiwear behavior.

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