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81 entries found


Naval Postgraduate School

Yap Kok Siong Jason ● 2020 ● Specialisation: Electronic Systems Engineering

A Network Intrusion Detection System on an Integrated Satellite-Terrestrial Network Based on Unmanned Systems Using Decision Tree Machine Learning

Keywords: -

In recent years, the Navy has shown interest in an integrated satellite-terrestrial networking (ISTN) architecture for unmanned systems. With the development of satellite networks and growing numbers of unmanned system networks being connected, security and privacy are a major concern in an ISTN. In this thesis, we develop a Network Intrusion Detection System (NIDS) specifically for an ISTN. We identify the critical location of the NIDS within the ISTN architecture and use the decision tree machine learning algorithm to perform…

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Naval Postgraduate School

Lim Wei Qin ● 2020 ● Specialisation: Systems Engineering

An Arctic Environment Readiness (AER) Model For Quantifying The Impact Of Extreme Arctic Weather On System Readiness

Keywords: -

The Artic regions offer significant opportunities to expand the military’s operational footprint. However, despite operating in the Arctic regions for about 100 years, the climate challenges of the artic continue to confront the military, slowing the expansion of operations within the region. The goal of this thesis is to develop an Arctic Environment Readiness (AER) model for operations in Arctic region and utilize the model to quantify the readiness of the equipment within the arctic environment. Taking into consideration of…

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Naval Postgraduate School

Tai Jia En Marcus ● 2020 ● Specialisation: Systems Engineering

Coactive Design in Systems Engineering: Human-Machine Teaming in Search and Rescue (SAR) Operations

Keywords: Coactive Design, systems engineering, search and rescue, unmanned, human-machine teaming, HMT, joint activity, interdependence, Coactive Systems Engineering Design, COSEED

Coactive Design is a process that addresses the increasingly complex roles that humans and robots play in modern digitalized systems. It analyzes the interdependencies between members in human-robot teamwork and optimizes interactive collaboration to support the team’s overall capabilities. The process endeavors to provide designers and industry players with the necessary analysis tools and techniques to move the industry away from robot-centric automation in which the traditional goal has been for robots to perform required tasks independently from the team.…

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Naval Postgraduate School

Ng Wei Xiang ● 2020 ● Specialisation: Operations Research

Concept Drift for Discrete-Event Simulation Modeling of Manufacturing Systems

Keywords: concept drift, discrete event simulation, manufacturing systems

Many discrete-event dynamic systems face changing underlying conditions over time. Manufacturing processes are one example of systems that can be well modeled using discrete-event simulation. System changes include cyclical changes due to natural queueing behavior and changes due to random variability, either of which can involve significant structural changes to the system. For example, machines can degrade in performance, work shift schedules can change, or resources can be reallocated in a state-dependent manner. The ability to detect such changes is…

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Naval Postgraduate School

Li Haocheng Joel ● 2020 ● Specialisation: Systems Engineering

Effects of Target Classification on AI-Based Unexploded Ordnance Detection Performance

Keywords: small unmanned aerial system, UXO detection, deep learning, neural network , target classification, target labelling

This thesis aims to reduce the safety risks for warfighters in an area of operations where unexploded ordnance (UXO) may be present, and lessen the number of training opportunities due to malfunctioning munitions in a controlled environment. The thesis leverages the advancement in unmanned technologies and artificial intelligence (AI) development to complete dull, dirty, and dangerous tasks more effectively. Specifically, the thesis attempts to improve a trained AI detector’s performance using different data-labeling methods as applied to the electro-optical images.…

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Naval Postgraduate School

Ong Wen Xiang ● 2020 ● Specialisation: Mechanical Engineering

Enhancing combat survivability of fighter aircraft using Self-protect High Energy Laser Demonstrator (SHiELD)

Keywords: -

The impetus for the study was that existing survivability enhancement features equipped on fighter aircraft could not physically defeat an incoming air-to-air or surface-to-air missile. As such, this thesis aimed to evaluate the enhancement to combat survivability of the 4th-generation F-16 and the 5th-generation F-35 by equipping them with the Self-protect High Energy Laser Demonstrator (SHiELD) tactical airborne laser pod. Operational combat scenarios involving the respective fighter aircraft and the surface-to-air missile system in a single-shot one-on-one engagement were modelled…

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Naval Postgraduate School

Lee Boon Kien Eugene ● 2020 ● Specialisation: Systems Engineering

Enhancing Mission Engineering Route Selection Through Digital Twin Decision Support

Keywords: mission engineering, digital twin, systems engineering

This thesis presents a Model-Based Systems Engineering (MBSE) methodology for the development of a Unmanned Aircraft System (UAS) Digital Twin (DT) with the ability to demonstrate route selection capability with a mission engineering focus. It reviews the concept of Mission Engineering (ME) and integrates it with MBSE framework for the development of the DT. The methodology is demonstrated through a case study where the UAS is deployed for a Last Mile Delivery (LMD) mission and a route optimization module recommends…

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Naval Postgraduate School

Adrian Chua ● 2020 ● Specialisation: Mechanical Engineering

Mechanical Behaviour of Cold Sprayed Cu-Ni Coating

Keywords: copper-nickel, Cu-Ni, cold spray, tensile, adhesion, nanoindentation, heat treatment, Young’s modulus, hardness, plasticity

Cold spray is a developing additive manufacturing technology well suited as preventive and corrective measures for metallic materials. The key challenge lies in formulating the optimal multifaceted spray parameters to achieve a functional coating on a substrate. Copper-Nickel (Cu-Ni) alloy is particularly suited for study due to its feasibility as both coating and repair material to be deposited onto a substrate through cold spray technology, and its well-established characteristics for corrosion protection and mechanical strength. This thesis studied the change…

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Naval Postgraduate School

Robert Justin Morales Naquila ● 2020 ● Specialisation: Systems Engineering

Model-Based UAS-UGS IED Clearance Mission Engineering

Keywords: UAS, UGS, machine-machine teaming, IED clearance, Cameo, Simulink, systems engineering, unmanned aircraft systems, unmanned ground systems, improvised explosive device

Machine-to-machine teaming is the trend of future warfare aiming at maximizing effectiveness of heterogeneous assets while performing a specific task or mission. Currently, modern militaries employ autonomous systems such as Unmanned Aircraft Systems (UAS) and Unmanned Ground Systems (UGS) independently with separate missions. This study explores the possibility of utilizing an autonomous swarm composed of UAS and UGS working in tandem in the improvised explosive device (IED) clearance mission in the urban environment. In this mission, the UAS serves as…

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Naval Postgraduate School

Chan Baixian Alvin ● 2020 ● Specialisation: Operations Research

Multi-Armed Bandit Models for Exploitation of Cyber Networks

Keywords: multi-armed bandit models, exploitation, cyber networks

Computer networks are often the target of cyber-attacks carried out by malevolent agents, to either disable critical system operations or to surreptitiously gain access to sensitive data. The asymmetric and covert nature of cyber-attacks have led to their increased prevalence, where high impact attacks on critical infrastructure can be launched with minimal resources. We consider the setup of a network switch and its connected nodes, and use multi-armed bandit models as a framework to formulate a network attack strategy to…

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