Earticle

Until now, there are not existed any research to reuse any software on heterogeneous smartphones for interoperating between Android/iphone and iphone/Android. To do this, our previous approach [7, 8, 12, 13, 14, 15, 16] just used UML metamodel and model transformation language, ATL, based on model oriented Architecture/development (MDA/MDD) to embedded systems. But it has limited for Model Transformation language to represent all transformation rules with ATL. This limitation is not suitable for heterogeneous smartphone model transformation, and also impossible to extension of ATL. To solve this problem, this paper suggests Smartphone Model Transformation Language (SMTL) oriented model transformation mechanism for heterogeneous smartphone. We define SMTL which easily manipulates more input model in SMTL engine. Through invoking operation in SMTL engine, it is directly mapped with API in Eclipse modeling Framework (EMF). In addition, design to use XPath as XML technique instead of OCL to search data in source model.

The marine diesel engine have been widely applied with a mechanical hydraulic governor to control the ship speed for long time. But it was recently very difficult for the mechanical hydraulic governor to control the speed of engine under the condition of low speed and low load because of jiggling by rough fluctuation of rotating torque and hunting by dead time of diesel engine. In order to analyze the speed control system the transfer function was converted from z to w transformation. The author proposed velocity control system with feedback loop by PID controller in order to stabilize for unstable area. The influence of dead time was discussed by Nichols chart and unit step response curve. It was confirmed through computer simulation that the performance improvement of a mechanical hydraulic governor can be obtained by PID controller.