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Functional Debugging of Equation-Based Languages

State-of-the-art debugging techniques for equation-based languages follow a low-level approach to interface users with the complex interactions between equations and algorithms that describe cyber-physical processes. Although these techniques are useful for understanding the low-level behaviors, they do not provide the means for creating a system-level understanding that is often necessary during the early concept product design phase. In this paper, we present a novel debugging technique for equation-based languages based on a high-level approach to facilitate the system-level understanding of complex cyber-physical processes. Our debugging interface is based on functional models that describe what the system does in a formal language that uses natural language elements to improve inter-disciplinary communication. Our novel technique, referred to as functional debugging, can be used in the context of the current systems engineering industrial practice in order to identify system-level problems and explore design alternatives during the early concept design phase. We present a working implementation of our functional debugger and we discuss the benefits of our approach using an automotive use-case.