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68 entries found


Cranfield University

Wong Wee Sian | 2019 | Specialisation: Systems Engineering

A System Approach To Develop A Defence Acquisition Strategy For A Small State

Keywords: -

Conventional wisdom says smaller states are more vulnerable due to them having less aggregate structural power, less resources and employable capabilities. Small states’ militaries also tend to be weaker due to having smaller populations and economies. The thesis investigates how does being a small state affect its ability to develop its military capabilities and in its defence acquisition policy. The student dissect the complexity involve in geopolitics and explore the context of the topic, using systems engineering tools and methods.…

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Cranfield University

Chua Tung Whee | 2019 | Specialisation: Systems Engineering for Defence Capability

A Systems Approach To Adopt Performance-based Logistics (PBL) For Military Systems, A Singapore Army Context

Keywords: -

Singapore, compared with her neighbours, is a small country with limited land space and no natural resources. The sustenance and growth of the economy hinge heavily on the nation’s ability to secure and defend her trade links. As such, the Singapore Army operates a fleet of state-of-the-art military equipment to provide the deterrence needed to ensure the nation’s prosperity and progress. Singapore’s military spending is one of the highest among the South-East Asian countries, with the bulk of the Gross…

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Cranfield University

Lim Seng Kiat | 2019 | Specialisation: Guided Weapon System

Design Of Multi-layered Protection Against Guided Mortar Threats Through Numerical Modelling

Keywords: -

As the military shifted towards greater mobility and mobile tactical light unit, there is a demand in lightweight, simple to construct, low-cost and effective ballistic protection system. While the current fragmentation protection such as gabion structures and reinforced concrete structures are effective, they are logistically demanding for a tactical unit. Therefore, the thesis aims to determine a configuration that optimise performance, mass and cost. High strength and ductility, wave spreading capability and good energy absorption are key properties for ballistic…

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Cranfield University

Tan He Wen | 2019 | Specialisation: Military Vehicle Technology

Prediction Of Mobility Performance Of Military Vehicle Using Fuzzy Logic

Keywords: -

Mobility assessment and performance prediction for military vehicles is challenging due to various subjective attributes where traditional analytical simulation method might not be able to fully capture the system behaviour. These attributes vary widely depending on the vehicle type, operator’s behaviour, and off-road environments. In this paper, the author explored the use of a hybrid modelling and simulation approach that combine fuzzy logic system with physic-based methodology for mobility performance prediction. This approach provides the means to capture the experience…

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Cranfield University

Cheng Ze Wei | 2019 | Specialisation: Autonomous Vehicle Dynamics & Control

Task Optimisation With Ordering Constraints

Keywords: -

Tasking problems for single and multiple UAVs are more complex versions of the travelling salesman’s problems. A vehicle, or set of vehicles, need to identify which of a series of tasks should be carried out to maximise the total reward over all tasks in a fixed time. Tasks typically have a location, duration and a reward as well as time windows in which they must be achieved. Some tasks may not have fixed time windows, but precedence constraints (they can…

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Naval Postgraduate School

Derek Tay Tian Ren | 2019 | Specialisation: Systems Engineering

A Systems Analysis On The Effectiveness Of Hyper-velocity Gun System (HVPGS) For Ground-based Air And Missile Defense

Keywords: systems analysis, Hyper Velocity Projectiles, Hyper Velocity Gun System, ballistic missile defense

This thesis investigates the employment of Hyper Velocity Projectiles (HVPs) as interceptors for the Army’s Air and Missile Defense (AMD) enterprise in the 2030–2035 timeline. The research recommends a proposed systems architecture for the incorporation of an HVP Gun System (HVPGS) to an AMD enterprise operating in a contested environment, with emphasis on the operating characteristics of the HVPs and their integration onto the firing platform. The study then develops a realistic operational scenario and models it using the ExtendSim…

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Naval Postgraduate School

Sim Guan Yu Aldin | 2019 | Specialisation: Systems Engineering

Development And Sensitivity Analysis Of A Mathematical Model For Mine Countermeasure Vessels In Early Design Stage

Keywords: vessel design process, Model-Based Systems Engineering, MBSE, digital engineering, mine countermeasures, MCM, mine countermeasure vessels

With the evolving requirements of future mine countermeasure (MCM) operations, the operational capabilities of the next generation platforms must be sufficiently flexible to meet these changing needs. As the United States Navy’s current and leading platform solutions to address rising threats are continually evolving, their operational capabilities are either directly derived from or influenced by the platforms’ architectural design parameters. Because of this mapping, traditional approaches of configuring operational systems around a vessel’s architectural design may have limited flexibility to…

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Naval Postgraduate School

Gabriel Lim Guang Nian | 2019 | Specialisation: Weapon Systems Engineering

Modelling Of Aqua-quad Solar Power Generation System

Keywords: -

The Aqua-Quad is a solar-powered hybrid autonomous vehicle being developed by the United States Naval Postgraduate School for surface and underwater reconnaissance. The vehicle rides on ocean currents and flies in the air to relocate. A realistic model of the Aqua-Quad’s solar power generation system was developed to predict the electrical energy generated given its geographic location and charging duration. This model can be employed within a lab environment for development work or integrated into the Aqua-Quad’s logic for operational…

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Naval Postgraduate School

Er Yong Han Ivan | 2019 | Specialisation: Systems Engineering

Revising The Value Models For The Marine Forces Reserve Supply And Maintenance (SMAT) Inspection Program

Keywords: Marine Corps, MARFORRES, value model

The Marine Forces Reserve (MARFORRES) is comprised mainly of “citizen-soldiers” that are required to operate across a broad spectrum of military operations at extended distances to support the Marine Corps missions. In recent years, the accountability and readiness scores for MARFORRES units have been declining. There have been previous studies endorsed by MARFORRES G-4 to develop a value model for the Supply and Maintenance Team (SMAT) inspection program through the analysis of a stakeholder-derived objectives hierarchy. This thesis expands upon…

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Naval Postgraduate School

Yang Shunxiong Sean | 2019 | Specialisation: Weapon Systems Engineering

Study Of The Power Required For Flight Of The Aqua-quad (Solar-powered Quad-rotor Unmanned Aerial System)

Keywords: unmanned aerial system, aerodynamics, solar-powered, autonomous, hybrid air vehicle, VTOL, swarm

This thesis describes a study of the in-flight energy consumption of the Aqua-Quad—a Naval Postgraduate School-developed small Unmanned Aerial System (UAS). The Aqua-Quad concept pairs small drones and solar power in an innovative quadrotor system that can be launched from water or land for persistent and autonomous Intelligence, Surveillance, and Reconnaissance (ISR) operations. The primary in-flight energy consumption of the Aqua-Quad stems from the thrust required to balance weight and drag during cruise flight. Analytically, this study used actuator disk…

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