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  • 1
    Online-Ressource
    Online-Ressource
    Experimental Study on the Droplet Separation Performance of PTFE Demister
    Trans Tech Publications, Ltd. ; 2014
    In:  Applied Mechanics and Materials Vol. 644-650 ( 2014-9), p. 5252-5255
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 644-650 ( 2014-9), p. 5252-5255
    Kurzfassung: An experiment setup was built to test the droplet separation performance of demister. Different experiments were conducted using various Polytetrafluoroethene (PTFE) meshes. Results show that the separation efficiency of demister is dependent on screen thickness, mesh count. Pressure drop increases with the increase of steam flow rate and screen thickness.
    Materialart: Online-Ressource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.644-650
    DOI: 10.4028/www.scientific.net/AMM.644-650.5252
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2014
    ZDB Id: 2251882-4
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 2
    Online-Ressource
    Online-Ressource
    Research of High Performance Closed Loop Control System for Stepper Motor
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 289 ( 2013-2), p. 87-92
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 289 ( 2013-2), p. 87-92
    Kurzfassung: A control system of double closed-loop for two-phase hybrid stepper motor which includes speed closed-loop and current closed-loop is established on the basis of fuzzy-PID control algorithm, space vector pulse width modulation (SVPWM) method, space vector conversion and mathematical modeling of stepper motor. In the control system, the stepper motor model is established according to the mathematic model; the current and speed of stepper motor are controlled in feedback by the adopting fuzzy-PID control algorithm; the space vector conversion is carried out in the current/voltage conversion section, and the space vector pulse width modulation method is used to produce pwm wave. The performance of the doubled closed-loop control system for stepper motor is analyzed by the powerful modeling and simulation function of MATLAB/Simulink. The simulation results show that the control system has favorable control performance and dynamics characteristics.
    Materialart: Online-Ressource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.289
    DOI: 10.4028/www.scientific.net/AMM.289.87
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2013
    ZDB Id: 2251882-4
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 3
    Online-Ressource
    Online-Ressource
    Microstructure and Properties of Ferrite/Organic Nanocomposite Prepared with Microemulsion Method
    Trans Tech Publications, Ltd. ; 2012
    In:  Materials Science Forum Vol. 722 ( 2012-6), p. 31-38
    Details
    In: Materials Science Forum, Trans Tech Publications, Ltd., Vol. 722 ( 2012-6), p. 31-38
    Kurzfassung: A magnetite composite composed of the organic compounds and Fe 3 O 4 nanoparticles was prepared with microemulsion method. The Tween 80 and ammonia were used as surfactant and reducing agent, respectively, in synthesizing the Fe 3 O 4 nanoparticles. The experimental results showed that the composite possessed good stability while the volume ratio of Tween 80 to butanol was 0.4 and the molar ratio of NH 4 OH to Fe 3 + was 14.6. The saturation magnetization of the composite depends on the molar ratio of NH 4 OH to Fe 3 + . The mechanism of this stable Fe 3 O 4 paste was realized by the Fe 3 O 4 nanocomposite film using TEM. The microstructures of the film show that the magnetic nanoparticles in the composite are surrounded by Tween 80, which separates the magnetic nanoparticles and leads to good stability.
    Materialart: Online-Ressource
    ISSN: 1662-9752
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/MSF.722
    DOI: 10.4028/www.scientific.net/MSF.722.31
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2012
    ZDB Id: 2047372-2
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Online-Ressource
    Online-Ressource
    A Precision CNC Turn-Mill Machining Center with Gear Hobbing Capability
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 300-301 ( 2013-2), p. 1241-1249
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 300-301 ( 2013-2), p. 1241-1249
    Kurzfassung: With ever increased demand for reduced sizes and increased complexity and accuracy, traditional machine tools have become ineffective for machining miniature components. Typical examples include dental implants, the parts used in mechanical watch movement, and the parts used in medical endoscope. With complex geometry and tight tolerance, few machine tools are capable of making them. This paper introduces our PC-based CNC Turn-Mill Machining Center. It has 5 axes, an automatic bar feeder, an automatic part collection tray, and a tool changer. In particularly, it has a special synchronization control algorithm that gives not only higher accuracy but also ease of use. In addition, to improve the accuracy, the software based volumetric error compensation system is implemented. Based on the experiment testing, the machining error is ± 3 µm in turning, ± 7 µm in milling and the maximum profile error is less than ± 7.5 µm in gear hobbing.
    Materialart: Online-Ressource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.300-301
    DOI: 10.4028/www.scientific.net/AMM.300-301.1241
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2013
    ZDB Id: 2251882-4
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 5
    Online-Ressource
    Online-Ressource
    A New Type of Servo Direct Drive Turret Punch Press
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 139-141 ( 2010-10), p. 752-757
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 139-141 ( 2010-10), p. 752-757
    Kurzfassung: A new type of servo direct drive turret punch press is presented. A servomotor to drive the eccentric-toggle mechanism is used in our design, which combines the advantages of mechanical and hydraulic turret punch press. The displacement, velocity, and acceleration of the punch are calculated, through the kinematics analysis. So, the motion of the punch is controllable through the rotation of the servomotor. Then, the inverse kinematics analysis is studied in detail, and the corresponding motion of the servomotor can be gotten, for different punch motion curves, according to the production requirement. For example, when we design a motion of the punch for a particular stamping process, the motion of servomotor can be obtained through the inverse kinematics analysis. Finally, Output force is acquired by static force analysis, which decides the working capability of the mechanism.
    Materialart: Online-Ressource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.139-141
    DOI: 10.4028/www.scientific.net/AMR.139-141.752
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2010
    ZDB Id: 2265002-7
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 6
    Online-Ressource
    Online-Ressource
    Harvesting Human Biomechanical Energy to Power Portable Electronics
    Trans Tech Publications, Ltd. ; 2012
    In:  Advanced Materials Research Vol. 516-517 ( 2012-5), p. 1779-1784
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 516-517 ( 2012-5), p. 1779-1784
    Kurzfassung: It is known that human body contains rich chemical energy, part of which is converted to mechanical energy up to 200W, especially when human in walking, so human body is an ideal sustainable energy resource for portable electronic devices. The motion pattern of human movement in normal walking is studied, showing that the arm swinging, knee motion and hip motion can be approximated as sinusoidal functions with relatively large amplitude. In order to harvest such human motion, several methods are investigated, including pendulum, translational spring and torsion spring, which can also be mathematically formatted as second order differential equation with damped item. This paper also gives a typical device to harvest human motion: a novel energy harvester which directly converts human motion to electricity based on electromagnetic induction. Detail structures of the harvesting device are illustrated with mathematical analysis. Simulation studies are also made.
    Materialart: Online-Ressource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.516-517
    DOI: 10.4028/www.scientific.net/AMR.516-517.1779
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2012
    ZDB Id: 2265002-7
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 7
    Online-Ressource
    Online-Ressource
    Preparation of Anti-Fouling Poly(Lactic Acid)(PLA) Hollow Fiber Membranes via Non-Solvent Induced Phase Separation
    Trans Tech Publications, Ltd. ; 2014
    In:  Advanced Materials Research Vol. 884-885 ( 2014-1), p. 112-116
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 884-885 ( 2014-1), p. 112-116
    Kurzfassung: Anti-fouling PLA hollow fibers were fabricated using synthesized PLA-PEG-PLA copolymer as an additive to improve the hydrophilicity. The tri-block copolymer was prepared by ring-opening polymerization and a hydrophilic copolymer processing good compatibility with PLA molecule was obtained and utilized to fabricate membrane with PLA by NIPS. Elemental analysis showed that PLA-PEG-PLA could stably exist in membranes and endow the membrane with persistent hydrophilic. Thus the contact angle decreased nearly 20 o with 5% PLA-PEG-PLA content, resulting in higher water permeability and BSA rejection which indicated the anti-fouling property of PLA membrane was improved.
    Materialart: Online-Ressource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.884-885
    DOI: 10.4028/www.scientific.net/AMR.884-885.112
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2014
    ZDB Id: 2265002-7
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 8
    Online-Ressource
    Online-Ressource
    Design and Analysis of 7-DOF Fiber Placement Machine
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 339 ( 2011-9), p. 271-275
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 339 ( 2011-9), p. 271-275
    Kurzfassung: This paper presents a 7-DOF (Degree Of Freedom) fiber placement machine. The fiber placement machine is designed through modular method and function analysis. The machine consists of three major parts: manipulator, spindle and creel cabinet, which has seven axes in total. The three rotating axes intersect in a vertex and three shifting axes of the manipulator are orthogonal. The style of wrist is orthogonal spherical wrist and it can achieve yawing, pitching and rolling motion. The placement head is mounted on the end of manipulator, including guide module, clamp module, restart module, cut module, compaction module, collection module and heat module, which can achieve independent control of tows clamp, restart and cut. The creel cabinet has the function of tension control.
    Materialart: Online-Ressource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.339
    DOI: 10.4028/www.scientific.net/AMR.339.271
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2011
    ZDB Id: 2265002-7
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    Online-Ressource
    Online-Ressource
    On Spiral Spring in Elastic Deformation
    Trans Tech Publications, Ltd. ; 2012
    In:  Applied Mechanics and Materials Vol. 268-270 ( 2012-12), p. 1105-1108
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 268-270 ( 2012-12), p. 1105-1108
    Kurzfassung: Spiral spring is one of most important components in mechanical systems. According to literatures, there are only few studies on spiral springs. Using the Castiliago’s method and Mohr’s theorem, the mechanic model of spiral spring in elastic deformation is developed. As a typical case, Archimedes spiral spring is studied in details and experiments are also conducted to validate the mechanic model. Experiment shows that the theoretical analysis and experimental result matches very well, therefore the mechanic model can be used to estimate the deformation of spiral spring and to guide and facilitate the design of spiral spring.
    Materialart: Online-Ressource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.268-270
    DOI: 10.4028/www.scientific.net/AMM.268-270.1105
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2012
    ZDB Id: 2251882-4
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 10
    Online-Ressource
    Online-Ressource
    Robot Fish with Novel Wire-Driven Continuum Flapping Propulsor
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 300-301 ( 2013-2), p. 510-514
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 300-301 ( 2013-2), p. 510-514
    Kurzfassung: This paper presents a robot fish with a novel continuum flapping propulsor. It is actuated by the biomimetic wire-driven mechanism. The fish tail is made from a continuous elastic plate. One pair of wire is used to control the tail flapping. Compared with the traditional multi-joint design, in this design the flapping motion could better fit the fish swimming curve, as a result improving the propulsion efficiency. Results show that the propulsion efficiency of the robot could reach 64.4%.
    Materialart: Online-Ressource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.300-301
    DOI: 10.4028/www.scientific.net/AMM.300-301.510
    Sprache: Unbekannt
    Verlag: Trans Tech Publications, Ltd.
    Publikationsdatum: 2013
    ZDB Id: 2251882-4
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
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