E-Mail Newsletter

             Issued by the Asian TOP Panel, September 2008

           The Chinese Mechanical Engineering Society (CMES)
           The Institution of Engineers, Indonesia (PII)
           The Japan Society of Mechanical Engineers (JSME)
           The Korean Society of Mechanical Engineers (KSME)


    According to the agreement made in the 2nd Asian TOP Panel Meeting,
the ENGINEERING NEWS IN BRIEF (E-mail newsletter) has now been edited
by the JSME for the year 2008.


1) Risk-Based-Approach of Machinery Safety (Source: JSME)
2) The New Toyota Variable Valve Timing and Lift System (VALVEMATIC)
   (Source: JSME)
3)  A Proposal of Social-Oriented Manufacturing Systems (Source: JSME)
4)  Research Activities on Micromachines at Kogakuin University(Source: JSME)
5)  A Method Based on Visual Attention in Tool Detection (Source: CMES)
6)  Research on Vertical Vibration Control and Test for Automobile
     Magneto-rheological Suspensions (Source: CMES)

7)  New Address and Contact Information of CMES (Source: CMES)
8)  An Optimal Design of Sandwich Panels with Wire-woven Bulk Kagome Cores
     (Source: KSME)

9)  Comparative Performance Analysis of Small Pressurized Fuel Cell/Gas Turbine
     Hybrid Systems (Source: KSME)

10) Experiment on Heat Transfer and Absorption Performance Enhancement for
Nanofluids (NH?/H?O + Nano-Particles) (Source: KSME)


1) Risk-Based-Approach of Machinery Safety

    Takashi Kabe, NPO The Safety Engineering Laboratory

The development of science and technology brings on one hand welfare to the society, but on the other hand danger to human being. The products are human-made and designers of machinery have therefore the responsibility to control hazards according to Risk-Based-Approach (RBA) to prevent accidents beforehand. The Japanese domestic legislation and standards have implemented the framework of global approach on safety of machinery in these days. This framework consists out of labor safety law and Japanese industrial standard (JIS), which is adapted to international standards, ISO or IEC on safety of machinery. In case of Japan, the relevant law requires the responsibility of user of machinery only and not yet of the machinery manufacturer. Thus users of machinery are required to pay attention, that purchasing machines are safe and fulfill also requirements of products liability law or contract law. The methodology risk assessment has a major role in this prevention way.


2) The New Toyota Variable Valve Timing and Lift System (VALVEMATIC)

  Takashi Kawasaki, Toyota Motor Corporation

 The continuously variable valve lift and timing (duration and phase) system, 乬VALVEMATIC乭, has been developed. It is able to improve fuel consumption by using smaller valve lift during low and middle engine load, which reduces  pumping loss by advanced Intake valve closing timing.

 The system consists of a special rocker arm, which realizes continuous variable timing and lift, and an electromotor. The intelligent actuator contains Toyota乫s originally developed planetary roller screw translating rotational motor movement to linear actuation.
 The VALVEMATIC system has been firstly adopted on ZR engine series,  launched in 2006. The engine achieved 5-10% fuel consumption improvement and good drivability thanks to harmonious control of VALVEMATIC and an electrical throttle valve. Improved volumetric efficiency by VALVEMATIC, also increases maximum output by 10%.


3) A Proposal of Social-Oriented Manufacturing Systems

    Toshiya Kaihara, Kobe University

Efficiency and robustness are required simultaneously in manufacturing systems planning and operation.  Social contract mechanism takes a metaphor for social interactions amongst decision makers, and its aim is to execute a rational allocation of multiple resources in their society. Then it must have great potential to realise sophisticated manufacturing management system in its nature. We propose a new manufacturing system paradigm with multi-disciplinary approach, called 乬Social-Oriented manufacturing systems乭, which integrates social scientific research area into production engineering. Each decision makers in manufacturing system is modelled as agents, and social interaction mechanism amongst agents plays an important role in effective production control with robustness against global environmental changes. We introduce 乬Real-Virtual integrated manufacturing system乭 concept to implement and realise our social-oriented manufacturing system. A prototype of the proposed Real-Virtual integrated manufacturing system consists of model plant system and virtual manufacturing system. Interaction mechanism between them enables adaptive management and control against unexpected events as social system can handle them autonomously.


4) Research Activities on Micromachines at Kogakuin University

    Kenji Suzuki, Kogakuin University

 乬Smart machine & Micro-Bio Systems Research Center (SMBC)乭 at Kogakuin University was established in 2003 in 乬High-Tech Research Center乭 Project for Private Universities, which is one of matching funds subsidy from MEXT (Ministry of Education, Culture Sports, Science and Technology). The main goal of this project is construction of multidisciplinary technological basis towards realizing smart micromachines and micro-bio systems. It is composed of 6 research themes and each theme is divided into several sub-themes. 48 researchers are participating in this project.
 The research themes include 乬Integration technology of microsystems,乭 which aims to acquire knowledge for microsystem integration through developing insect-inspired robots and devices. For example, a water-strider robot that moves on a water surface utilizing the surface the tension force was developed. The robot with a vibration motor successfully moved on water and also made left/right turns by exploiting differences in the resonant frequencies of the legs.
 A novel micro motor utilizing the surface tension force was also developed. The motor consists of stator electrodes, water droplets and a hydrophobic rotor. The water droplets are transported by electrowetting on dielectric (EWOD) and the rotor is supported and rotated on the droplets. The motor was successfully driven at 320 rpm.

Key words: micromachine, insect-inspired robot, surface tension force


5) A Method Based on Visual Attention in Tool Detection

    Dou Yan, Kong Lingfu, Yanshan University

To solve the problem of target detection, which is appeared in the visual guide robot processing system, the human visual selective attention mechanism was introduced into the machine vision systems. A computational model of visual selective attention based on the contour was proposed. It realized the testing goal by using a strategy of separating object, extracting edge, perceiving contour, competing in the saliency of contour, choosing and transferring attention focus. Experimental results indicate that the model can be attained to the accuracy of target detection in complex scenes, possesses a strong anti-jamming capability and high computing efficiency, which has a potential of using in the machine vision system directly.

Key words: machine vision system; contour detection; visual selective attention; segmentation edge contour object (SECO) model


6) Research on Vertical Vibration Control and Test for Automobile     Magneto-rheological Suspensions

Li Rui, Chen Weimin, Yu Miao, Liao Changrong, Zhang Honghui, Li Yinguo,   Chongqing University , Chongqing University of Posts and Telecommunications

Based on necessary analysis and simplification on suspension vibration system, a hierarchical intelligent control system was proposed. In the control level, a local fuzzy adaptive (FA) controller was designed for each magneto-rheological (MR) independent suspension system, which can online adjust quantization factor and scale factor of fuzzy controller by human-like intelligent parameter modifying algorithm. In the coordination level, a coordination controller was designed to coordinate the four local independent FA controllers, by adjusting their output parameters according to system feedback in different conditions. Simulation tests were carried out in MATLAB. To validate the real results of hierarchical control, a MR suspension control and test system was set up and implemented on a muni bus. Road tests under various conditions were carried out. Compared to passive suspension, the hierarchical controller employed on MR suspension reduces the vibration acceleration of body floor about 15% and that of seat about 23%. The results indicate that the hierarchical controller can effectively reduce MR suspension vertical vibration, minimize the effect of simplified suspension system and damper model, and improve ride comfort.

Key words: automobile; magneto-rheological damper; hierarchical control; fuzzy adaptive control; coordination control; road test

7) New Address and Contact Information of CMES

   CMES office address and telephone/fax numbers have changed.
   New address (from August 1, 2008)
   Chinese Mechanical Engineering Society
   11th Floor, Block 4, Zhuyu International Business Center
   9 Shouti South Road, Haidian District
   Beijing 100044
   New contact:
   Department of International Affairs
   Mr. Rong Guang, Deputy Director
   Tel: +86 10 68799038, Fax: +86 10 68799050, rongg@cmes.org
   Ms. Liang Ying
   Tel: +86 10 68799037, Fax: +86 10 68799050, liangy@cmes.org
   Please update your information.
   Thank you for informing all persons and organizations concerned.


8) An Optimal Design of Sandwich Panels with Wire-woven Bulk Kagome     Cores

   Yong-Hyun Lee,POSCO
   Ki-Ju Kang, Chonnam National University

 First, the effect of the geometry such as the curved shape of the struts composing the truss structure of WBK is elaborated. Then, analytic solutions for the material properties of WBK and the maximum loads of a WBK-cored sandwich panel under bending are derived. A design optimization with the face sheet thickness and the core height selected as the design variables is presented for given slenderness ratios of the WBK core. Unless the face sheet thickness is limited, the optimal design to give the maximum load per weight is always found at a confluence of three failure modes, namely, face sheet yielding, indentation plastic, and core shear modeB plastic.

Key words: PCM(Periodic Cellular Metal), Kagome Truss, Sandwich Panel, Ultra Light Metal Structure, WBK(Wire-wounded Bulk Kagome


8) CMES Headquarters has Moved to New Office

 We are glad to inform that CMES headquarters乫 office has been moved to the 11th Floor, Building No. 4, Zhuyu International Business Center 9 Shoutinan Road Beijing 100044, in August.
 Conventionally located in the centre of Beijing city, it offers a more comfortable environment to customers and staff. You will find numerous facilities to accommodate different types of meeting, ensuring that our dedicated team will provide our members with the highest levels of service.


9) Comparative Performance Analysis of Small Pressurized Fuel Cell/ Gas     Turbine Hybrid Systems

Sung Ku Park, Byung June You, Tong Seop Kim, Inha University
     Jeong L. Sohn, Seoul National University,
      Kook Young Ahn, Korea Institute of Machinery and Materials

Design performances of the fuel cell / gas turbine hybrid power generation systems based on two different fuel cells (PEMFC, SOFC) have been comparatively analyzed. In each system, the fuel cell operates at an elevated pressure corresponding to the compressed air pressure of the gas turbine. Both internally and externally reformed systems were analyzed for the SOFC hybrid system. Component design parameters of 10? class small systems are assumed. For all hybrid systems, increasing the turbine inlet temperature increases the power portion of the gas turbine. With increasing the turbine inlet temperature, system efficiency decreases in the PEMFC system and the internally reformed SOFC system while that of the externally reformed SOFC system increases slightly. The internally reformed SOFC hybrid system is predicted to exhibit the best system efficiency.

Key words: PEMFC, SOFC, Gas Turbine, Hybrid System, Pressurized System, Internal Reforming, External reforming


10) Experiment on Heat Transfer and Absorption Performance Enhancement for Binary Nanofluids (NH?/H?O + Nano-Particles)

Jin Ki Lee, Chung Woo Jung, Yong Tae Kang, Kyunghee University

The objectives of this paper are to examine the effect of nano-particles on the pool type absorption heat transfer enhancement and to find the optimal conditions to design a highly effective compact absorber for ammonia/water absorption system. The effect of Al?O? nano-particles and carbon nanotube(CNT) on the absorption performance is studied experimentally. The experimental ranges of the key parameters are 20% of ammonia concentration, 0.0 - 0.08 vol% (volume fraction) of CNT particles, and 0.0 - 0.06 vol% of Al?O? nano-particles. For the ammonia/water nanofluids, the heat transfer rate and absorption rate with 0.02 vol% Al2O3 nano-particles were found to be 29% and 18% higher than those without nano-particles, respectively. It is recommended that the concentration of 0.02 vol% of Al?O? nano-particles be the best candidate for ammonia/water absorption performance enhancement.

Key Words: Binary Nanofluids, Absorption, Nano-particles, Ammonia/Water, Al?O?, CNT

Editor : International Affairs Committee
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