Rhapsody in June

IBM Rational Rhapsody IBM Rational Rhapsody Reference Workflow Guide

The Rhapsody Semantics of Statecharts

We describe the semantics of statecharts as implemented in the current version of the Rhapsody tool. In its original 1996 version this was among the first executable semantics for object-oriented statecharts, and many of its fundamentals have been adopted in the Unified Modeling Language (UML). Due to the special challenges of object-oriented behavior, the semantics of statecharts in Rhapsody d...

How to play the first bar of Rhapsody in Blue

To play the glissando opening Gershwin’s Rhapsody in Blue, expert clarinettists combine unusual fingerings with even more unusual vocal tract configurations to achieve a nearly continuous rise in pitch. To study directly the player’s vocal tract when performing the glissando, we incorporated an acoustic impedance measurement head within a clarinet mouthpiece. The player’s vocal tract impedance ...

Simulating Rhapsody SysML Blocks in Hybrid Models with FMI

The Functional Mockup Interface (FMI) standard enables hybrid simulation of models from different tools. Such tools can have different underlying behavioral semantics, creating challenges when models are combined. A case in point is the combination of the Rhapsody tool, widely used to describe and implement discrete control behavior, and Modelica, widely used to describe continuous plant behavi...

The assessment of interlocking control algorithm developed by Rhapsody

Train signal system is responsible for safety of train operation by controlling train safety distance and train route. In Europe, new safety standards are firmly defined for verifying and validating safety of this system (EN50126, EN50128). These standards require certification about organization, process, tools which are necessary for system development. In case of developing main algorithms o...