scholarly journals The Naval Postgraduate School’s Department of Systems Engineering Approach to Mission Engineering Education through Capstone Projects

Systems ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 38 ◽  
Author(s):  
Douglas L. Van Bossuyt ◽  
Paul Beery ◽  
Bryan M. O’Halloran ◽  
Alejandro Hernandez ◽  
Eugene Paulo
Keyword(s):  
Systems Engineering ◽  
System Analysis ◽  
System Modeling ◽  
System Level ◽  
Naval Postgraduate School ◽  
Engineering Project ◽  
Educational Approach ◽  
Capstone Courses ◽  
Engineering Department ◽  
Capstone Projects

This article presents an educational approach to applied capstone research projects using a mission engineering focus. It reviews recent advances in mission engineering within the Department of Defense and integrates that work into an approach for research within the Systems Engineering Department at the Naval Postgraduate School. A generalized sequence of System Definition, System Modeling, and System Analysis is presented as an executable sequence of activities to support analysis of operational missions within a student research project at Naval Postgraduate School (NPS). That approach is detailed and demonstrated through analysis of the integration of a long-range strike capability on a MH-60S helicopter. The article serves as a demonstration of an approach for producing operationally applicable results from student projects in the context of mission engineering. Specifically, it demonstrates that students can execute a systems engineering project that conducts system-level design with direct consideration of mission impacts at the system of systems level. Discussion of the benefits and limitations of this approach are discussed and suggestions for integrating mission engineering into capstone courses are provided.

Automatic Integration of System-Level Design and System Optimization Based on SysML

2012 ◽  
Vol 249-250 ◽  
pp. 1154-1159
Author(s):  
Yu Sheng Liu ◽  
Wen Qiang Yuan
Keyword(s):  
System Design ◽  
Systems Engineering ◽  
Optimization Model ◽  
System Modeling ◽  
System Optimization ◽  
System Level ◽  
Design Parameters ◽  
System Level Design ◽  
Model Based ◽  
Level Design

Model based systems engineering (MBSE) is becoming a promising approach for the system-level design of complex mechatronics. And several MBSE tools are developed to conduct system modeling. However, the system design cannot be optimized in current MBSE tools. In this study, an approach is presented to conduct the task. A set of optimization stereotype is defined at first which is used to formalize the optimization model based on the system design model. Then the design parameters and their relationships applied optimization stereotypes are extracted and transferred to construct the tool-dependent optimization model. Finally, the optimization model is solved and the results are given back and then modify the corresponding system model automatically. In this paper, MagicDraw is used to model the whole system whereas Matlab optimizer is used for optimization. The combustion engine is chosen as the example to illustrate the proposed approach.

Transient Root Cause Analysis: A Model-Based Systems Engineering Methodology

2004 ◽  
Author(s):  
Trevor Bailey ◽  
Suzanne Woll ◽  
Rajul Misra ◽  
Kevin Otto
Keyword(s):  
Systems Engineering ◽  
Best Practice ◽  
Success Factors ◽  
System Modeling ◽  
Root Cause Analysis ◽  
System Level ◽  
Cause Analysis ◽  
Root Cause ◽  
Model Based ◽  
Model Based Systems Engineering

This paper presents a model-based systems engineering methodology that can be applied to perform a root cause analysis on transient systems. The methodology extends existing root cause analysis best practice by incorporating system modeling and analysis techniques. The methodology is deployed through a detailed 5-step process to understand, identify, assess, FMEA, and validate potential transient system-level root causes. A transient performance reliability analysis for a dual mode refrigeration system is used to demonstrate how the methodology can be applied. The paper also describes a set of success factors for applying the methodology using a phased approach with a large cross-functional team.

MBSE Model on Gas Turbine Tip Clearance Control

2019 ◽  
Author(s):  
Guruprasad Kulkarni ◽  
Sebastian Price
Keyword(s):  
Systems Engineering ◽  
System Analysis ◽  
Functional Model ◽  
Tip Clearance ◽  
System Level ◽  
Functional Requirements ◽  
Critical System ◽  
Analysis And Design ◽  
Frame Work ◽  
Clearance Control

Abstract Model Based System Engineering (MBSE) is a systems engineering methodology to understand the customer needs and create functional model to capture requirements and develop design definitions. This paper represents the MBSE activity carried out on Turbine Tip Clearance Control (TCC) System for a Trent XWB Engine. TCC is a critical system of an Aircraft engine, whose function is vital throughout the engine life. This is a complex system as both mechanical and control systems need to interact seamlessly to meet its operational requirement. The key accomplishment of this study is, abstracting of complex mechanical system into functional model and connecting it to functional model of Controls in MBSE environment. This is done for a system that meets the standards of very safety critical and highly regulated industry of Civil Aircraft Engines. The software used for building requirements models for TCC is Capella. Capella is open source free software built on Architecture Analysis and Design Integrated Approach (Arcadia) frame work. This framework extends and simplifies SysML. The advantages of this frame work over SysML are explained in [Ref. 1]. The Arcadia frame work is well suited to capture the complex systems involving multiple disciplines along with Mechanical systems as explained in [Ref. 2]. This paper presents a detailed study performed on product system level requirements and captures both functional and non-functional requirements such as operational and safety requirements. In the Arcadia framework this is represented at system analysis level. Further studies capture the logical and physical architecture which is representative in nature.

scholarly journals On the use of coordination strategies in complex engineered system design projects

2020 ◽  
Vol 6 ◽  
Author(s):  
Arianne X. Collopy ◽  
Eytan Adar ◽  
Panos Y. Papalambros
Keyword(s):  
System Design ◽  
Systems Engineering ◽  
Large Scale ◽  
System Level ◽  
Engineering Project ◽  
Design Work ◽  
Coordination Strategies ◽  
Technical Leadership ◽  
Complex Engineered Systems ◽  
Design Projects

Abstract Coordination of distributed design work is an important activity in large-scale and complex engineered systems (LSCES) design projects. Coordination strategies have been studied formally in system design optimization and organizational science. This article reports on a study to identify what strategies are used in coordination practice. While the literature primarily offers prescriptive coordination strategies, this study focussed on the contribution of individuals’ behaviours to system-level coordination. Thus, a coordination strategy is seen as a particular set of individual actions and behaviours. We interviewed professionals with expertise in systems engineering, project management and technical leadership at two large aerospace design organizations. Through qualitative thematic analysis, we identified two strategies used to facilitate coordination. The first we call authority-based and is enabled by technical know-how and the use of organizational authority; the second we call empathetic leadership and includes interpersonal skills, leadership traits and empathy. These strategies emerged as complementary and, together, enabled individuals to coordinate complex design tasks. We found that skills identified in competency models enable these coordination strategies, which in turn support management of interdependent work in the organization. Studying the role of individuals contributes an expanded view on how coordination facilitates LSCES design practice.

Technology Characterization Models and Their Use in Systems Design

2014 ◽  
Vol 136 (7) ◽  
Author(s):  
Robert R. Parker ◽  
Edgar Galvan ◽  
Richard J. Malak
Keyword(s):  
Decision Making ◽  
Systems Engineering ◽  
Systems Design ◽  
Computational Effort ◽  
Engineering Problem ◽  
Component Technology ◽  
System Level ◽  
Support Vector ◽  
Engineering Project ◽  
Set Based Design

Prior research suggests that set-based design representations can be useful for facilitating collaboration among engineers in a design project. However, existing set-based methods are limited in terms of how the sets are constructed and in their representational capability. The focus of this article is on the problem of modeling the capabilities of a component technology in a way that can be communicated and used in support of system-level decision making. The context is the system definition phases of a systems engineering project, when engineers still are considering various technical concepts. The approach under investigation requires engineers familiar with the component- or subsystem-level technologies to generate a set-based model of their achievable technical attributes, called a technology characterization model (TCM). Systems engineers then use these models to explore system-level alternatives and choose the combination of technologies that are best suited to the design problem. Previously, this approach was shown to be theoretically sound from a decision making perspective under idealized circumstances. This article is an investigation into the practical effectiveness of different TCM representational methods under realistic conditions such as having limited data. A power plant systems engineering problem is used as an example, with TCMs generated for different technical concepts for the condenser component. Samples of valid condenser realizations are used as inputs to the TCM representation methods. Two TCM representation methods are compared based on their solution accuracy and computational effort required: a Kriging-based interpolation and a machine learning technique called support vector domain description (SVDD). The results from this example hold that the SVDD-based method provides the better combination of accuracy and efficiency.

scholarly journals Towards Holistic System Models Including Domain-Specific Simulation Models Based on SysML

Systems ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 76
Author(s):  
Yizhe Zhang ◽  
Gregor Hoepfner ◽  
Joerg Berroth ◽  
Gerwin Pasch ◽  
Georg Jacobs
Keyword(s):  
Systems Engineering ◽  
System Modeling ◽  
Simulation Models ◽  
System Level ◽  
Modeling Language ◽  
Major Drawback ◽  
System Models ◽  
Domain Specific ◽  
Modeling Approach ◽  
Architecture Modeling

In the face of the rapid growth in the scale and complexity of multidisciplinary systems, being able to develop reliable systems under ever-faster changing and more individual market requirements is becoming more and more challenging. The Model-Based Systems Engineering (MBSE) approach has already been researched heavily, and started to be introduced for the management of complexity, maintaining consistency, and reducing development costs and the time-to-market. However, a major drawback of the current MBSE methodologies is the lack of capability to integrate with domain-specific simulation models to investigate design concepts in the early phases of the development process. In order to address this issue, we propose a holistic system modeling approach that allows system engineers to link descriptive system models with domain-specific simulation models. In this paper, the Systems Modeling Language (SysML) is used as the standard architecture modeling language. A system modeling approach in SysML based on the system’s functional architecture for system design and validation is defined. The approach was developed to integrate domain-specific models into the system model using a SysML modeler with the capability of running and reusing simulation tasks via the coupling of external tools, which helps to bridge the existing gap between models on the system level and detail level. The feasibility of the proposed approach will be evaluated based on the case study of a wind turbine (WT) system. The study shows that our approach has the potential to enable the consistent, parameter-based interlinkage of domain-specific models based on always-up-to-date data, and to assist engineers in making design decisions to meet the system requirements accurately and rapidly in different engineering fields.

scholarly journals Aircraft Requirements for Sustainable Regional Aviation

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 61
Author(s):  
Dominik Eisenhut ◽  
Nicolas Moebs ◽  
Evert Windels ◽  
Dominique Bergmann ◽  
Ingmar Geiß ◽  
...  
Keyword(s):  
Systems Engineering ◽  
System Level ◽  
Policy Initiative ◽  
The European Union ◽  
Calculation Methods ◽  
Figures Of Merit ◽  
Performance Requirements ◽  
High Level ◽  
Different Levels ◽  
The Eu

Recently, the new Green Deal policy initiative was presented by the European Union. The EU aims to achieve a sustainable future and be the first climate-neutral continent by 2050. It targets all of the continent’s industries, meaning aviation must contribute to these changes as well. By employing a systems engineering approach, this high-level task can be split into different levels to get from the vision to the relevant system or product itself. Part of this iterative process involves the aircraft requirements, which make the goals more achievable on the system level and allow validation of whether the designed systems fulfill these requirements. Within this work, the top-level aircraft requirements (TLARs) for a hybrid-electric regional aircraft for up to 50 passengers are presented. Apart from performance requirements, other requirements, like environmental ones, are also included. To check whether these requirements are fulfilled, different reference missions were defined which challenge various extremes within the requirements. Furthermore, figures of merit are established, providing a way of validating and comparing different aircraft designs. The modular structure of these aircraft designs ensures the possibility of evaluating different architectures and adapting these figures if necessary. Moreover, different criteria can be accounted for, or their calculation methods or weighting can be changed.

scholarly journals USING MODEL-BASED SYSTEMS ENGINEERING FOR NEED-BASED AND CONSISTENT SUPPORT OF THE DESIGN PROCESS

2021 ◽  
Vol 1 ◽  
pp. 3369-3378
Author(s):  
Stephan Husung ◽  
Christian Weber ◽  
Atif Mahboob ◽  
Sven Kleiner
Keyword(s):  
Systems Engineering ◽  
Development Process ◽  
Added Value ◽  
System Level ◽  
System Failure ◽  
Model Based ◽  
Continuous Use ◽  
Model Based Systems Engineering ◽  
Consistent Support ◽  
Modelling Approaches

AbstractModel-Based Systems Engineering (MBSE) is an efficient approach to support product development in order to meet today's challenges. The MBSE approach includes methods and, above all, modelling approaches of the technical system with the aim of continuous use in development. The objective of this paper is to use the potential of the MBSE models and to show the added value of such models on the system level when used as a single source. With this objective, this paper presents a three-step approach to systematically identify and apply meaningful modelling approaches within MBSE, based on the needs during the development process. Furthermore, an FMEA example is included in this paper to elaborate the use of MBSE in the system failure analysis.

OTEC Power System Modeling, Analysis and Design via Geometric Programming

1980 ◽  
Vol 102 (3) ◽  
pp. 154-159 ◽  
Author(s):  
A. Lavi
Keyword(s):  
Nonlinear Programming ◽  
Power System ◽  
Geometric Programming ◽  
Power Plants ◽  
System Analysis ◽  
System Modeling ◽  
Analytical Treatment ◽  
Transfer Energy ◽  
Analysis And Design ◽  
Operating Variables

A complex power system may be modeled by a system of inequalities representing the constraints imposed by the physical laws: heat transfer, energy balance, cycle efficiency and so forth. The nature of the resulting mathematical model is such that the terms contain complex expressions involving the design and operating variables of the process. With the addition of an objective function involving the cost of major system components, a multivariable nonlinear programming problem can be formulated. Seldom does the model lend itself to analytical treatment. This paper is concerned with a specific formulation and solution of nonlinear programming problems which arise in the design of ocean thermal energy conversion (OTEC) power plants. The technique used is geometric programming, GP. It is shown that GP serves as an excellent tool for system analysis because it provides sensitivity information essential to the designer.

A postgraduate capstone project: Impact on student learning and organizational change

2021 ◽  
pp. 095042222110365
Author(s):  
Gordon R. Elwell ◽  
Thad E. Dickinson ◽  
Michael D. Dillon
Keyword(s):  
Organizational Change ◽  
Adult Students ◽  
Graduate Program ◽  
Common Component ◽  
Work Related ◽  
Academic Knowledge ◽  
Capstone Courses ◽  
Capstone Project ◽  
The Usa ◽  
Capstone Projects

The capstone course serves to integrate accumulated knowledge with a culminating experience or project and is a common component in undergraduate and graduate programs. The research on capstones courses shows that many capstone experiences or projects involve students working with outside clients, such as local businesses and organizations, to solve problems or develop new projects or campaigns. Such capstone experiences or projects seek to offer students real-world, career-building experience, while the clients seek to benefit from the learned academic knowledge of the students. Where the literature is scarce on client-based capstone projects is when the client is the student’s employer or career-related organization. A graduate program in administration at a public Midwestern university in the USA offers a different approach to the student–client model by requiring a degree-culminating capstone project that challenges adult students to apply their learned knowledge to solve administrative problems not for an outside client but at their place of employment or career-related organization. The researchers surveyed 66 alumni and interviewed 6 on how the capstone project had benefited their work-related learning and its impact on their employer or career-related organization. Students perceived an improvement in their ability to define and analyze administrative problems in their workplace, while the employers or organizations which implemented the project recommendations experienced positive organizational change. This case study contributes to the literature on capstone courses by examining the relevance of a work- or career-related capstone project to students and their workplace.

Sign in / Sign up

Export Citation Format

Share Document