Ideals : an introduction to the project and the book

No abstract

Property-preserving synthesis for unified conrol- and data-oriented models.

In the software/hardware engineering model-driven design methodology, preservation of real-time system properties can be guaranteed in the model synthesis up to a small time-deviation. Therefore, this methodology is well suited for the design and implementation of control systems in which execution times of actions are small; thus the time-deviations obtained are small. However, in systems containing time-intensive computations, the time-deviations become large and, consequently, the real-time properties are much weakened. This chapter proposes an approach for obtaining stronger preservation of the observable properties of the system by abstracting from its internal unobservable actions. In this way, a unified way of analysis and synthesis of a larger area of real-time applications can be obtained, which enables designers to achieve predictability in the design of many systems

An executable interface specification for industrial embedded system design.

Nowadays, designers resort to abstraction techniques to conquer the complexity of industrial embedded systems during the design process. However, due to the large semantic gap between the abstractions and the implementation, the designers often fails to apply the abstraction techniques. In this paper, an EIS-based (executable interface specification) approach is proposed for the embedded system design.The proposed approach starts with using interface state diagrams to specify system architectures. A set of rules is introduced to transfer these diagrams into an executable model (EIS model) consistently. By making use of simulation/verification techniques, many architectural design errors can be detected in the EIS model at an early design stage. In the end, the EIS model can be systematically transferred into an interpreted implementation or a compiled implementation based on the constraints of the embedded platform. In this way, the inconsistencies between the high-level abstractions and the implementation can largely be reduced

From POOSL to UPPAAL : transformation and quantitative analysis

POOSL (Parallel Object-Oriented Specification Language) is a powerful general purpose system-level modeling language. In research on design space exploration of motion control systems, POOSL has been used to construct models for performance analysis. The considered motion control algorithms are characterized by periodic execution. They are executed by multiple processors, which are interconnected by Rapid Input/Output (RapidIO) packet switches. Packet latencies as worst-case latencies and average-case latencies are essential performance criteria for motion control systems. However, POOSL analysis merely allows for estimation results for these latency metrics since it is primarily based on simulation. Because motion control systems are time-critical and safety-critical, worst-case latencies of packets are strict timing constraints. Therefore exact worst-case latencies are to be determined. Motivated by this requirement we propose to use model checking techniques. In this paper we illustrate how a POOSL model of a (simplified) motion control system can be transformed into an UPPAAL model and we verify its functional behavior and worst-case latencies. Moreover, we show that analysis of average-case latencies can also be accomplished with assistance of the model checking tool UPPAAL