Multi-Physics Simulation Based Design and Analysis of a High Speed Aerostatic Spindle and its Performance Assessment

2014 ◽  
Author(s):  
Siyu Gao ◽  
Kai Cheng ◽  
Hui Ding
Keyword(s):  
High Speed ◽  
Integrated Approach ◽  
Heat Sinks ◽  
Integrated Modelling ◽  
Spindle System ◽  
Simulation Based Design ◽  
Physics Simulation ◽  
Speed Up ◽  
Analysis Models ◽  
Aerostatic Spindle

High speed aerostatic spindles operating at a speed up to 200,000 r/min are a complex product with a multi-physics nature resulted from embedded mechanical-thermal-fluidic-electromagnetic fields. It is much needed to have a comprehensive analysis on the multi-physic interactions within a high speed aerostatic spindle, which is essential for design of the spindles working at much higher speeds and accuracy in various increasingly stringent engineering conditions. This paper presents a multi-physics integrated modelling approach for design and analysis of the high speed aerostatic spindle, including thermal, electromagnetic, mechanical and fluidic analysis models. The heat source, heat transfer mechanism and heat sinks of the spindle system are comprehensively investigated. Furthermore, air film pressure distribution is studied to lead to optimal design and analysis of loading capacity and stiffness of the aerostatic bearings. The multi-physics modelling is implemented using the CFD-FEA integrated approach and validated experimentally. It is shown that the multi-physics integrated modelling is able to simulate the performance characteristics of the spindle system accurately.

Scanning x-ray fluorescence microscopy and principal component analysis

1992 ◽  
Vol 50 (2) ◽  
pp. 1752-1753
Author(s):  
Brian Cross
Keyword(s):  
Principal Component Analysis ◽  
Fluorescence Microscopy ◽  
Spatial Resolution ◽  
High Speed ◽  
Image Acquisition ◽  
Principal Component ◽  
Fluorescence Microscope ◽  
Acquisition Rate ◽  
X Ray ◽  
Speed Up

A relatively new entry, in the field of microscopy, is the Scanning X-Ray Fluorescence Microscope (SXRFM). Using this type of instrument (e.g. Kevex Omicron X-ray Microprobe), one can obtain multiple elemental x-ray images, from the analysis of materials which show heterogeneity. The SXRFM obtains images by collimating an x-ray beam (e.g. 100 μm diameter), and then scanning the sample with a high-speed x-y stage. To speed up the image acquisition, data is acquired "on-the-fly" by slew-scanning the stage along the x-axis, like a TV or SEM scan. To reduce the overhead from "fly-back," the images can be acquired by bi-directional scanning of the x-axis. This results in very little overhead with the re-positioning of the sample stage. The image acquisition rate is dominated by the x-ray acquisition rate. Therefore, the total x-ray image acquisition rate, using the SXRFM, is very comparable to an SEM. Although the x-ray spatial resolution of the SXRFM is worse than an SEM (say 100 vs. 2 μm), there are several other advantages.

Adequate Strength for Small High-Speed Vessels

1968 ◽  
Vol 5 (01) ◽  
pp. 63-71
Author(s):  
Philip J. Danahy
Keyword(s):  
Stress Analysis ◽  
High Speed ◽  
Structural Strength ◽  
Integrated Approach ◽  
Suggested Method ◽  
Impact Loads ◽  
Analysis Method ◽  
Safety Factors ◽  
Recreational Vessels

The paper presents a method for the determination of the critical minimum scantlings for small high-speed vessels. Particular attention is given to the shell plating strength for hydrodynamic impact loads. The suggested method uses an integrated approach involving assumed loads, suggested safety factors, and preferred stress-analysis method. The stress analysis uses plastic theory based partly on the works of J. Clarkson and Thein Wah. Included in the paper is a comparison of the relative structural strength of several commercial, military, and experimental hydrofoil vessels along with a few planing boats and a seaplane hull. This shows the variation of existing vessel structures and compares them to the results obtained by the suggested method. Most commercial, military, and recreational vessels exceed the minimum scantlings of the suggested method. The most significant deviation is the hull of the seaplane:

Experimental Study on the Dynamic Deformation of Simply Supported Beam in Chinese High-speed Railway

2018 ◽  
Author(s):  
Gonglian Dai ◽  
Meng Wang ◽  
Tianliang Zhao ◽  
Wenshuo Liu
Keyword(s):  
High Speed ◽  
Structure Design ◽  
Dynamic Coefficient ◽  
Bridge Structure ◽  
High Speed Railway ◽  
Simply Supported Beam ◽  
Vertical Stiffness ◽  
Simply Supported ◽  
Speed Up ◽  
Design Speed

<p>At present, Chinese high-speed railway operating mileage has exceeded 20 thousand km, and the proportion of the bridge is nearly 50%. Moreover, high-speed railway design speed is constantly improving. Therefore, controlling the deformation of the bridge structure strictly is particularly important to train speed-up as well as to ensure the smoothness of the line. This paper, based on the field test, shows the vertical and transverse absolute displacements of bridge structure by field collection. What’s more, resonance speed and dynamic coefficient of bridge were studied. The results show that: the horizontal and vertical stiffness of the bridge can meet the requirements of <b>Chinese “high-speed railway design specification” (HRDS)</b>, and the structure design can be optimized. However, the dynamic coefficient may be greater than the specification suggested value. And the simply supported beam with CRTSII ballastless track has second-order vertical resonance velocity 306km/h and third-order transverse resonance velocity 312km/h by test results, which are all coincide with the theoretical resonance velocity.</p>

scholarly journals AC_ICAP: A Flexible High Speed ICAP Controller

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Luis Andres Cardona ◽  
Carles Ferrer
Keyword(s):  
High Speed ◽  
Access Port ◽  
Field Programmable ◽  
Programmable Gate Arrays ◽  
Speed Up ◽  
Run Time ◽  
Ip Cores ◽  
Similar Solutions ◽  
Internal Configuration ◽  
Run Time Reconfiguration

The Internal Configuration Access Port (ICAP) is the core component of any dynamic partial reconfigurable system implemented in Xilinx SRAM-based Field Programmable Gate Arrays (FPGAs). We developed a new high speed ICAP controller, named AC_ICAP, completely implemented in hardware. In addition to similar solutions to accelerate the management of partial bitstreams and frames, AC_ICAP also supports run-time reconfiguration of LUTs without requiring precomputed partial bitstreams. This last characteristic was possible by performing reverse engineering on the bitstream. Besides, we adapted this hardware-based solution to provide IP cores accessible from the MicroBlaze processor. To this end, the controller was extended and three versions were implemented to evaluate its performance when connected to Peripheral Local Bus (PLB), Fast Simplex Link (FSL), and AXI interfaces of the processor. In consequence, the controller can exploit the flexibility that the processor offers but taking advantage of the hardware speed-up. It was implemented in both Virtex-5 and Kintex7 FPGAs. Results of reconfiguration time showed that run-time reconfiguration of single LUTs in Virtex-5 devices was performed in less than 5 μs which implies a speed-up of more than 380x compared to the Xilinx XPS_HWICAP controller.

scholarly journals A multi-physics simulation approach for energy and cost analysis during the deceleration of high-speed trains

2018 ◽  
Vol 24 ◽  
pp. 8-14 ◽  
Author(s):  
David Meinel ◽  
Tallal Javied ◽  
Sebastian Rast ◽  
Christian Zipp ◽  
Jörg Franke
Keyword(s):  
Cost Analysis ◽  
High Speed ◽  
Simulation Approach ◽  
Physics Simulation ◽  
High Speed Trains

Design of Hydraulic Motor Spindle for High Speed Machining

2000 ◽  
Author(s):  
Emmanuel I. Agba ◽  
Majid Babai
Keyword(s):  
Composite Materials ◽  
Electric Motor ◽  
High Speed ◽  
Operating Conditions ◽  
High Speed Machining ◽  
Strong Indication ◽  
Hydraulic Motor ◽  
Cutting Power ◽  
Spindle System ◽  
Distinct Increase

Abstract This paper presents the design of a hydraulic motor driven spindle for the processing of metals and composite materials at high rotational speeds. Existing technologies applicable to spindles and spindle holders under severe operating conditions were reviewed. A conceptual design of the hydraulic spindle system was developed. A strong indication of distinct increase in spindle life and gains in cutting power at higher rotational speeds when compared to the conventional electric motor driven spindles underscored the need for the new spindle system.

Simulationsgestütze Auslegung eines Hochdrehzahl-Kegelrollenlagers/Simulation Based Design of a High-Speed Tapered Roller Bearing

Konstruktion ◽  
2017 ◽  
Vol 69 (07-08) ◽  
pp. 83-90
Author(s):  
Christian Brecher ◽  
Marcel Fey ◽  
Alexander Hassis
Keyword(s):  
High Speed ◽  
Roller Bearing ◽  
Tapered Roller Bearing ◽  
Simulation Based Design ◽  
Simulation Based ◽  
Tapered Roller

Inhalt: Übliche Kegelrollenlager zeichnen sich durch eine im Vergleich zu Spindellagern sehr hohe Steifigkeit und Tragfähigkeit aus. Gleichzeitig ist ihre Drehzahleignung deutlich geringer, was den Einsatz in Werkzeugmaschinen-Hauptspindeln zur Fräsbearbeitung in den meisten Fällen ausschließt. Mit dem hier vorgestellten zweistufigen Verfahren wird ein Kegelrollenlager für den Betrieb bei hohen Drehzahlen ausgelegt. Im ersten Schritt erfolgt die Auslegung der Makrogeometrie durch Lösung eines Optimierungsproblems. Zur Auslegung der Mikrogeometrie kommen in zweiten Schritt Methoden zur Kontaktberechnung und -beschreibung zur Anwendung.

Integrasi Sistem Pelaporan Kerusakan Laboratorium dan SMS Gateway Untuk Realtime Notification Laporan Kerusakan Melalui SMS Dengan Pendekatan Service Oriented Architecture (SOA)

Respati ◽  
2017 ◽  
Vol 12 (3) ◽  
Author(s):  
Yudi Susanto
Keyword(s):  
High Speed ◽  
Service Oriented Architecture ◽  
Reporting System ◽  
Modern Society ◽  
Ease Of Use ◽  
Short Message ◽  
Existing Problems ◽  
Service Oriented ◽  
Speed Up ◽  
Read Rate

INTISARILayanan Pesan Singkat atau Short Message Services(SMS) merupakan salah satu layanan jaringan telepon seluler yang digunakan untuk mengirimkan pesan pendek. Kemudahan dalam penggunaannya menjadikan SMS sebagai salah satu pengirim pesan yang banyak digunakan. Menurut Jamie Tolentino dalam artikelnya yang berjudul “Why are people still using SMS in 2015?” yang dipublikasikan dihalaman thenextweb.com mengatakan bahwa SMS merupakan cara berkomunikasi yang paling efektif dalam menjangkau pengguna dengan prosentasi 90 % dibaca dalam waktu satu menit. SMS adalah satu untuk semua solusi yang membuat siapa saja (yang mempunyai nomor ponsel) dapat dijangkau. Teknologi untuk mengirim dan menerima SMS tidak bergantung pada internet berkecepatan tinggi, yang pada dasarnya membuat siapa pun dalam masyarakat dapat dijangkau.Sistem Pelaporan Kerusakan Laboratorium merupakan sebuah sistem yang digunakan untuk mencatat berbagai permasalahan yang terjadi meliputi lokasi laboratorium, nomor komputer dan detil permasalahannya. Sistem informasi ini berbasiskan web dengan harapan sistem ini dapat diakses dari komputer manapun dan kapanpun. Dengan menggunakan sistem tersebut maka dapat dilihat secara detail segala permasalahan yang terjadi pada laboratorium sehingga pengelola laboratorium dapat menyiapkan langkah-langkah untuk menanganinya. Namun pada praktiknya banyak permasalahan yang tidak diselesaikan karena informasi permasalahan tersebut tidak sampai kepada para teknisi. Hal ini disebabkan karena untuk mengakses informasi kerusakan teknisi harus login melalui komputer sehingga memakan waktu. Dengan cara pengiriman notifikasi permasalahan yang terjadi pada laboratorium melalui sms maka setiap ada laporan permasalahan yang masuk ke Sistem Pelaporan Kerusakan akan langsung diteruskan ke teknisi secara langsung melalui pesan sms tanpa harus melakukan akses ke sistem. Hal ini dapat mempercepat proses sampainya informasi permasalahan laboratorium kepada teknisi sehingga penanganan permasalahan dapat dilakukan dengan cepat.Untuk mengintegrasikan Sistem Pelaporan Kerusakan Laboratorium dengan notifikasi SMS dapat dilakukan dengan pendekatan Service Oriented Architecture (SOA) sehingga proses integrasi tidak perlu merubah sistem yang sudah ada.Kata Kunci : Sistem Informasi, Service Oriented Architecture, SOA, Kylix, SMS GatewayABSTRACTThe Short Message Services (SMS) service is one of the mobile phone network services used to deliver short messages. Ease of use makes SMS as one of the most widely used message senders. According to Jamie Tolentino in his article entitled "Why are people still using SMS in 2015?" Published on page thenextweb.com said that SMS is the most effective way to reach users, with a 90 percent read rate in minutes. SMS is a one- size- fits- all solution which makes anybody (with a mobile number) reachable.The technology for sending and receiving SMS is not reliant on high speed internet, essentially making anyone in modern society reachable.Laboratory Damage Reporting System is a system used to record various problems that occur include the location of the laboratory, computer number and details of the problem. This information system is web based in the hope that this system can be accessed from any computer and anytime. By using the system it can be viewed in detail all the problems that occur in the laboratory so that the laboratory manager can prepare the steps to handle it. But in practice many problems are not resolved because the problem information is not up to the technicians. This is because to access the information the technician must log on through the computer so that it takes time.By way of notification of problems that occur in the laboratory through sms then any existing problems report into the Laboratory Damage Reporting System will be directly forwarded to the technician directly through sms messages without having to access the system. This can speed up the process of getting the information of laboratory problems to the technician so that problem handling can be done quickly.To integrate Laboratory Hazard Reporting System with SMS notification can be done with Service Oriented Architecture (SOA) approach so that the integration process does not need to change the existing system.Keywords : Information Systems, Service Oriented Architecture, SOA, Kylix, SMS Gateway

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