Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
manufacturing information system for the production of a tote box on the mechanical system of gamma irradiators 300 kCi facilities has been completed. Some factors that can support the successful development of the manufacturing industry are increasing mastery of technology, supported by the implementation of the management system of manufacturing, and precise manufacturing systems. Manufacturing activities to produce a tote box contain some of the information required by management. To get this information with conventional information systems take a long time. Some of the manufacturing processes for the production of a tote box include cutting, boring, machining, welding, bending, and assembling, supported by means of raw material inventory. Every part of the manufacturing process has some data that can be used as a source of information. This data includes information from the manufacturing process and a supply of raw materials into inputs for the manufacture of information systems with computer network systems. Input from the manufacturing process can be collected at any time with the help of the Microsoft Access software. Information systems for the production of tote boxes in this paper can specify the amount of production for one month for every part of the manufacturing process data and supply data of raw materials. With the creation of manufacturing information systems for tote box manufacturing production for gamma irradiators 300 kCi, the manufacturing information can be a source of accurate information so that management can more quickly determine the progress of the manufacturing process and be faster in making decisions, such as ordering the raw material, inspecting if production bottleneck occurs, etc.

Abstrak :
This handbook volume aims to provide a comprehensive, self-contained, and authoritative reference in MEMS. It covers the theoretical and practical aspects including but not limited to sensors, actuators, RF MEMS, micro fluids and bio MEMS systems. It is particularly recommended to undergraduates, postgraduates, researchers, scientists, and field experts. This comprehensive summary will provide a solid knowledge background and inspire innovations in this highly interdisciplinary field. The handbook series consists of 5 volumes: Micro/nano fabrication technology, MEMS, Nanomaterial, Nanomedicine and Applications of micro-/nanotechnologies in IT. Experienced researchers and experts are invited to contribute in each of these areas.The series is published under Springer Major Reference works, which allows continuous online update and publication. These features allow newcomers and other readers to keep in touch with the most up-to-date information in micro-/nanotechnologies.It presents an overview of the knowledge base, as well as selected topics and provides comprehensive and authoritative information on the field for researchers, engineers, scientists and graduate students who are involved in different aspects of micro-/nanotechnologies.This publication will provide inspiration for innovative research and application ideas for continued growth of the field.

Abstrak :
Penelitian ini merupakan pengembangan kedua dari perancangan micro class underater ROV (Remotely Operated Vehicle). Underwater ROV merupakan sebuah wahana yang beroperasi di bawah permukaan air dan dikendalikan oleh remote kontrol. Micro class berarti wahana tersebut berbobot 3 sampai 5 kg. Fokus penelitian ini ada pada pengembangan sistem mekanikal, yaitu desain main body, desain sistem rangka, dan desain sistem thruster. Permodelan desain mekanik menggunakan bantuan software Computer Aided Design (CAD). Sistem mekanikal yang dibuat mengkonsiderasikan konsep positive stability, yaitu kondisi dimana sebuah objek akan selalu kembali kepada kondisi stabil setelah diberi gangguan. Hal ini didapatkan dengan mendesain prototipe yang memiliki titik buoyancy berada diatas titik berat. Pada desain yang dibuat, kondisi positive stability tercapai dengan jarak antar titik 30 mm. Di dalam desain main body ditentukan metode kedap air, yaitu penggunaan o-ring pada tutup main body, dan penggunaan resin serta katalis pada kabel yang terpasang masuk ke dalam main body. Metode kedap air tersebut dilakukan eksperimen pada kolam kedalaman 3 m dan tercapai karakteristik tingkat kedap air yang diinginkan serta memenuhi standar tingkat kedap air untuk underwater ROV, yaitu IP44. Pada desain sistem thruster, ditentukan menggunakan konfigurasi 6 thruster, dengan 4 thruster horizontal dan 2 thruster vertikal, dan dilakukan simulasi menggunakan software Computational Fluid Dynamics (CFD) pada 5 variasi sudut serang (α) dari propeller yang dimodelkan. Simulasi CFD dilakukan untuk mendapatkan thrust yang dihasilkan dan power yang dibutuhkan untuk tiap variasi sudut serang (α) propeller, sehingga dapat memilih sudut serang (α) yang paling optimal yang akan digunakan. Didapatkan sudut serang (α) yang paling optimal pada 40 derajat dengan nilai thrust 2546,84 N dan power yang dibutuhkan sebesar 117,07 kW saat propeller berputar dalam kondisi ideal yang melibatkan faktor drag dan viskos dari fluida dengan kecepatan putar maksimum motor 25590 RPM. Perkembangan lebih jauh dibutuhkan untuk membuktikan secara eksperimental konsep positive stability dan keefektifan penggunaan konfigurasi 6 thruster saat bermanuver di lapangan, serta penambahhan fitur-fitur lainnya.

---

This study is the second prototype development of micro class underwater ROV (Remotely Operated Vehicle). Underwater ROV is a device that operated underwater and controlled by remote control. The term micro class means that the device weight is around 3 to 5 kg. the focus of this study is on the development of a mechanical design system, such as main body design, frame system design, and thruster system design. The prototype is modeled with a Computer-Aided Design (CAD) software. One design consideration in modeling this prototype is positive stability, which is, a condition of an object will always go back to its stable states after force was given. This concept can be achieved by designing the prototype whereas the center of buoyancy is above the center of gravity. This condition was met and validated by CAD software which can locate both centers. In the software stated that the distance of both centers is 30 mm. Then the other design consideration is choosing a method of water tightening on the main body. Using an o-ring around the mouth of the main body and resin and its catalyst for the cable, which penetrates to inside the main body, is proven to be effective in avoiding leakage when submerging the prototype to 3 m depth of water. Water tightness standard rating for underwater ROV is also achieved, which is IP44. Then, configurations of 6 thrusters are chosen for the prototype, where 4 horizontal thrusters, and 2 vertical. This study also conducts an experiment using a simulation with Computational Fluid Dynamics (CFD) software. The purpose of this simulation is to find the most optimal angle of attack (α), in term of thrust generated and power usage, from 5 variant angle of attack (α) propeller. This simulation shows that 40 degrees angle of attack (α) propeller variant is the most optimal, with 2546,84 N thrust and 117,07 kW power is needed when the propeller is rotating at an angular velocity of 25590 RPM, which is the maximum angular velocity can be generated by the motor. Further development is required to validate and prove experimentally the concept of positive stability, and the effectiveness of 6 thruster configuration, also adding another feature to the prototype.