Sebastian J. I. Herzig

• Doctor of Philosophy (Ph.D.), Mechanical Engineering
• Developer at Microsoft

In model-driven engineering, the aim of design space explo-ration (DSE) is to generate a set of design candidates that satisfy a given set of constraints and requirements, and are optimal with respect to some criteria. In multi-paradigm modeling it is not uncommon to perform a variety of computationally expensive analyses as part of such an explora...

A crucial part of verifying and validating models is the iden-tification of inconsistencies. Inconsistencies can exist whenever models overlap semantically. Such overlaps are predominant in model-driven en-gineering, where the use of multiple viewpoints leads to a variety of in-complete representations of one or more aspects of a system. While the...

Developing complex engineering systems requires the consolidation of models from a variety of domains such as economics, mechanics and software engineering. These models are typically created using differing formalisms and by stakeholders that have varying views on the same problem statement. The challenging question is: what is needed to make sure...

A typical way of managing the inherent complexity of contemporary technical systems is to study them from different viewpoints. Such viewpoints are defined by a variety of factors, including the concerns of interest, level of abstraction, observers and context. Views conforming to these viewpoints are typically highly interrelated since the concern...

Book Series Editorial Board John Michopoulos, Naval Research Laboratory David Rosen, Georgia Institute of Technology Chris Paredis, Georgia Institute of Technology Judy Vance, Iowa State University This is the second volume in this book series that aims to capture advances in computers and information in engineering research, especially by research...

This paper reports a design study for a space-based decametric wavelength telescope. While not a new concept, this design study focused on many of the operational aspects that would be required for an actual mission. This design optimized the number of spacecraft to insure good visibility of approx. 80% of the radio galaxies -- the primary science...

This paper reports a design study for a space-based decametric wavelength telescope. While not a new concept, this design study focused on many of the operational aspects that would be required for an actual mission. This design optimized the number of spacecraft to insure good visibility of approx. 80% of the radio galaxies– the primary science ta...

The application of model transformations to the process of design space exploration and multi-objective optimization allows for comprehensive exploration of an architectural trade space. For many applications, such as the design of missions involving multiple spacecraft, the resulting set of Pareto-optimal solution models can be too large to be con...

The OpenSE Cookbook is an open-sourced collection of patterns, procedures, and best practices targeted for systems engineers who seek guidance on applying model-based and executable systems engineering (MBSE) using SysML. Its content has emerged from the system level modeling effort on the European Framework Program 6 (FP6) and the Thirty Meter Tel...

This paper presents a novel method for verifying interfaces and generating interface control documents (ICDs) from a system model in SysMLTM. In systems and software engineering, ICDs are key artifacts that specify the interface(s) to a system or subsystem, and are used to control the documentation of these interfaces. ICDs enable independent teams...

Design synthesis is a fundamental engineering task that encompasses mapping a functional specification to a set of physical components and their topological relationships, where the mappings are typically non-unique. Even for moderately complex systems the consideration of all possible mappings is typically not feasible, making a manual exploration...

Alignment and Phasing System (APS) is responsible for the optical alignment via starlight of the approximately 12,000 degrees of freedom of the primary, secondary and tertiary mirrors of Thirty Meter Telescope (TMT). APS is based on the successful Phasing Camera System (PCS) used to align the Keck Telescopes. Since the successful APS conceptual des...

The development of automated production systems requires the collaborative effort of a variety of stakeholders from different disciplines. In model-based systems engineering, stakeholders address their specific concerns by forming a number of views using models. Because of the multi-disciplinary nature of automated production systems, a variety of...

Designing and developing complex mechatronic systems requires the consolidation of models from a variety of domains. These models are created by different stakeholders using a variety of formalisms for the purpose of addressing specific concerns, and are used for representing different views on the same system. While it is considered good practice...

The involvement of multiple stakeholders in the design of complex engineered system presents many challenges. One of the challenge is that the overlapping stakeholder concerns leads to semantic relationships appearing between models. From an inconsistency management perspective, it is critical to investigate how these relationships appear and what...

A crucial issue in system architecting is the need to study systems from different viewpoints. These viewpoints are defined by a variety of factors, including the concerns of interest, level of abstraction, observers and context. Views conforming to these viewpoints are highly interrelated due to the concerns addressed overlapping. These interrelat...

The Jet Propulsion Laboratory (JPL) is investing heavily in the development of an infrastructure for building system models using the Systems Modeling Language (SysML). An essential component is a transformation apparatus that permits diverse models to be integrated independently of their nature (e.g. declarative, analytical and statistical). This...

The varying stakeholder concerns in product development today introduces a number of design challenges. From the perspective of Model-Based Systems Engineering (MBSE), a particular challenge is that multiple views established to address the stakeholder concerns are overlapping with many dependencies in between. The important question is how to adeq...

This paper presents results and experiences gathered from the VECTOR (Verification of Concepts for Tracking and Orientation) experiment within the REXUS sounding rocket program. A novel dynamic spiral tracking (DST) concept for the tracking of fastmoving objects, such as sounding rockets, is introduced. The method is based on conical motion of the...

Model-based systems engineering (MBSE) has several advantages in comparison to the traditional document-based approach. Two important advantages are improved communication and knowledge-capture. Within MBSE, object-oriented modeling languages like the Systems Modeling Language (SysML) are increasingly applied to spacecraft design. These modeling la...