Transport Systems
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Item Open Access '2D Spatially-Resolved Depth-Section Microfluidic Flow Velocimetry Using Dual Beam OCT'(Cranfield University, 2020-04-27 15:33) Hallam, Jonathan; Tatam, Ralph; Rigas, Evangelos; Charrett, Tom'Data and associated figures and supplementary materials for '2D Spatially-Resolved Depth-Section Microfluidic Flow Velocimetry Using Dual Beam OCT' published in Micromachines special edition 4th Conference on Microfluidic Handling Systems 2-4th October 2019. Update: 27/04/2020. Added 'requirements.txt' listing exact python packages required and clarified 'readme.txt'.'Item Open Access A Fibre Optic Long Period Grating Immunosensor for Campylobacter jejuni with Enhanced Sensitivity by Bacterial Staining(Cranfield University, 2018-10-22 10:29) Rendon Romero, AntonioPoster presented at the Cranfield Doctoral Network Annual Event 2018. Campylobacteriosis is one of the most widely reported bacterial cause of gastroenteritis in humans in the world. One of the bacterial species that most causes the disease is Campylobacter jejuni. The detection of Campylobacter jejuni by sensitising the surface of an optical fibre long period grating (LPG) with covalently attached rabbit polyclonal antibody is explored. The sensitivity of the sensor is enhanced by bacterial staining allowing the detection of concentration as low as 102CFU/mL. Finally, the selectivity of the sensor against other bacterial species is evaluated.Item Open Access A long-wave infra-red pulsed external-cavity QCL spectrometer using a hollow waveguide gas cell: Data(Cranfield University, 2024-04-25 08:45) Francis, Daniel; Hodgkinson, Jane; Tatam, RalphA spectrometer built using an external cavity pulsed quantum cascade laser is described. The spectrometer has a tuning range from 10 €“ 13 um (1,000 €“ 769 cm-1) and is designed to target volatile organic compounds (VOCs) which often exhibit water-free molecular absorption within the region. The spectrometer utilizes a hollow silica waveguide gas cell which has an internal volume of a few millilitres, a fast response time (~1 s), and is advantageous when only low sample volumes, similar to the cell volume, are available.Item Open Access A Novel Hybrid Electrochemical Equivalent Circuit Model for Online Battery Management Systems(Cranfield University, 2024-08-02) Cai, Chengxi; Auger, DanielA Novel Hybrid Electrochemical Equivalent Circuit Model for Online Battery Management SystemsItem Open Access A Paradigm Shift Toward Zero Accident(Cranfield University, 2017-09-22 08:36) Soltani, AmirmasoudPresented at the "Future of Transportation" World Conference, July 2017, Cologne, Germany.Item Open Access Aerosonde Simulation(Cranfield University, 2018-03-15 14:53) Pelham, JoniAerosonde Simulink simulation with mission simulator, and fault simulator. Development of work by Whidborne, Saban, et alItem Open Access All-electronic frequency stabilization of a DFB laser diode(Cranfield University, 2017-05-11 13:27) Asmari, Abdullah|Hodgkinson, Jane; Chehura, Edmon; Staines, Stephen; Tatam, RalphData to support the paper All-electronic frequency stabilization of a DFB laser diode A Asmari, J Hodgkinson, E Chehura, SE Staines and RP Tatam Optics Express 25 (10), 11679-11691, 2017. Doi: 10.1364/OE.25.011679Item Open Access An ammonia sensor based on Lossy Mode Resonances on a tapered optical fibre coated with porphyrin-incorporated titanium dioxide(Cranfield University, 2016-11-28 09:12) Tiwari, Divya; Mullaney, Kevin; James, Stephen; Tatam, RalphData presented in: An ammonia sensor based on Lossy Mode Resonances on a tapered optical fibre coated with porphyrin-incorporated titanium dioxide, Tiwari et al Sensors and Actuators B 2016 - http://dx.doi.org/10.1016/j.snb.2016.11.092 Figure3.xlsx - The transmission spectrum obtained in air and water from a typical 40 µm non-adiabatic (a), a 17 µm non-adiabatic (b), a 40 µm adiabatic (c) and a 17 µm adiabatic (d) tapered optical fibre. Figure 4.zip - transmission spectra of a non-adiabatic tapered optical fibre of waist diameter 17 microns with time and thus increasing thickness of the TMPyP-TiO2 coating. Figure 5_6_7.zip - transmission spectrum of an adiabatic tapered optical fibre of waist diameter 17 microns with time and thus increasing thickness of the TMPyP-TiO2 coating. Figure 8 and 9.zip transmission spectra when an adiabatic tapered optical fibre of diameter 17 microns was immersed in differing concentrations of ammoniaItem Open Access Application of fibre optic sensing systems to measure rotor blade structural dynamics - underlying data(Cranfield University, 2021-03-12 09:17) James, Stephen; Kissinger, Thomas; Tatam, Ralph; Barrington, James; Chehura, Edmon; Weber, Simone; Mullaney, Kevin; Zanotti Fragonara, Luca; Petrunin, Ivan; Staines, StephenRefer to the paper for full details. Fig9a.csv: Comparison of the Power Spectral Density (PSD) of data recorded by the direct optical fibre shape sensing system, an optical fibre Bragg grating strain sensor and a 1D accelerometer with finite element modeling predictions, measured on the top surface of an Airbus Helicopters H135 bearingless main rotor blade on the quarter chord line at approximately 40% rotor radius. Fig9b.csv: Comparison of the Power Spectral Density (PSD) of data recorded by the direct optical fibre shape sensing system, an optical fibre Bragg grating strain sensor and a 1D accelerometer with finite element modeling predictions, measured on the top surface of an Airbus Helicopters H135 bearingless main rotor blade on the quarter chord line at approximately 60% rotor radius. Fig10_FBG_top.csv: Power Spectral Density (PSD) of the 7th fibre Bragg grating strain (FBG) sensor (FBG7) in the three FBG arrays bonded to the top surface of the Airbus Helicopters H135 bearingless main rotor blade, located at approximately 60% rotor radius. Fig10_FBG_bottom.csv: Power Spectral Density (PSD) of the 7th fibre Bragg grating strain sensor (FBG7) in the three FBG arrays bonded to the bottom surface of the Airbus Helicopters H135 bearingless main rotor blade, located at approximately 60% rotor radius. Fig11.csv: Time series of raw data of 3F frequency input collected at approximately 60% rotor radius for the accelerometer, fibre Bragg grating strain sensor and direct optical fibre shape sensor (vertical direction). Fig12.csv: Comparison of Power Spectral Density (PSD) for the 3F mode measured at approximately 60% rotor radius by the accelerometer, fibre Bragg grating strain sensor and direct optical fibre shape sensor (vertical direction). Fig14.csv: Mode shapes measured using the direct optical fibre shape sensor Fig15.cvs: Comparison of normalised displacement mode shapes measured using a 1D accelerometer, the direct optical fibre shape sensor with the finite element model prediction Fig16.csv: Normalised angle measurements performed by the direct optical fibre shape sensor with the ouput from the FE model for Mode 5F Fig17.csv:Comparison of normalised strain mode shapes determined by the FBG strain sensors and the output from the FE model.Item Open Access Applied Optics: HSW gas cells for mid-IR spectroscopy (2016)(Cranfield University, 2016-08-22 13:32) Francis, Daniel; Hodgkinson, Jane; Tatam, RalphData associated with Applied Optics submission, 'Low volume, fast response-time hollow silica waveguide gas cells for mid-IR spectroscopy'Item Open Access AR SUS & QUIS Hololens(Cranfield University, 2024-08-09) Li, Wen-Chin; Zhang, Jingyi; Blundell, James; Court, SamuelAR system usability and user experience in flight operationsItem Open Access Battery thermal management system design, modelling and optimisation(Cranfield University, 2018-10-22 10:41) valerio Morganti, Manlio3 Minute Thesis presented at the Cranfield Doctoral Network Annual Event 2018. The growth of the electric vehicle market has led to an increase in the diffusion of batteries. Batteries are energy storage devices subject to uneven heat generation, having unisotropic thermal properties and being forced to comply with tight temperature range requirements (-10°C to 40°C), to avoid aging and permanent performance drop at low temperatures and safety concerns at high temperatures. In addition to that, the temperature gradient across a battery pack, across a module and across a single cell, needs to be monitored in order to prevent a battery life shortening. In such scenario, literature lacks of medium-fidelity coupled-physics models that can simulate both the electrical and the thermal behaviour of the battery cells at a low computational cost. In addition, no systematic methodology for battery thermal management design is currently available. The aim of this work is to provide a battery thermal management design procedure based on a coupled-physics model of a single cell that can be scaled up to a module and a pack model. The proposed simulation library allows the quick implementation of thermal models of different cell chemistries and geometries. A single cell model is then used to populate a whole module model. More modules populate a pack model. The use of a multi-physics simulation tool keeps computational costs much lower than a full-scale finite-element-method-based software. In order to ensure the reliability of results, models are validated against a single-module test rig. A liquid indirect thermal management is taken as case study. Different scenarios and options are examined and optimal solutions are proposed in each case. Objectives are minimisation of weight, cost, volume and energy consumption and operating temperature ranges and temperature gradients are taken as constraints. This methodology is lean, flexible and can be adapted to different vehicle classes reducing development time and costs.Item Open Access CAVE GDP 2022 Photos(Cranfield University, 2022-07-01 14:54) Cecotti, MarcoJust some pictures of the Group Design Project for the MSc in Connected and Autonomous Vehicle EngineeringItem Open Access CogShift - Typical Trial(Cranfield University, 2023-12-11 15:47) Cecotti, MarcoThis is the video of one of the vehicle trials for the CogShift project. CogShift, one of five projects which are part of an £11 million UK Government investment in autonomous vehicle research, studied driver attention and cognitive control characteristics. The project developed an optimal control-authority shifting system which takes driver attention into account. More information can be found at https://www.cranfield.ac.uk/research-projects/cogshift.Item Open Access Control for Motion Sickness Minimisation in Autonomous Vehicles(Cranfield University, 2018-10-22 10:13) Htike, ZawPoster presented at the Cranfield Doctoral Network Annual Event 2018. Autonomous vehicles or self-driving vehicles are expected to become a wide scale deployment for public use in the very near future. Recent study shown that there will be increase in frequency and severity of motion sickness due to engaging in non-driving tasks. This establishes motion sickness as being the elephant in the room and the increase in occurrence of motion sickness is predicting to be a limitation to the successful introduction of full vehicle automation. Motion sickness is a condition marked by symptoms of nausea dizziness, and other physical discomfort. The accepted cause of motion sickness is being the sensory conflict between inputs from the visual, vestibular and somatosensory systems of human body. Factors that might increase or decrease the severity of sickness symptoms includes ages, genders, alcohols, drugs, motion environments, other environmental and psychological aspect. Nevertheless, motion sickness in road vehicles is most closely related to low-frequency fore-and-aft, lateral, yaw acceleration. The range of these frequencies stated in the Standards guideline (International Standard, British Standards and Military Standards) for human exposed to whole-body mechanical vibration and shock, are in the range between 0.1 to 0.5 Hz. Previous experiments studies also shown that passenger motion sickness increases with increased exposure to lateral motion at low frequencies less than 0.5 Hz. This project aims to develop a control strategy that could minimise motion sickness in autonomous vehicles. The first part of the project explores the empirical formulations outlined in the Standards to evaluate motion sickness as a form of predicted illness rating or motion sickness incidence. A simple optimisation algorithm is developed to investigate the effectiveness of reducing motion sickness based from such formulations. The second part of the project looks at the sensory conflict theory for estimating motion sickness by adopting the existing 6-DOF subjective vertical conflict model. This model would later incorporate with vehicle model, and an optimal control strategy would be implemented to minimise motion sickness.Item Open Access Correction of periodic displacement non-linearities by two-wavelength interferometry - associated data(Cranfield University, 2021-08-23 10:26) Bridges, Angus; Yacoot, Andrew; Kissinger, Thomas; Humphreys, David; Tatam, RalphData associated with the publication "Correction of periodic displacement non-linearities by two-wavelength interferometry".Item Open Access Data for "Electric Vehicle Battery Parameter Identification and SOC Observability Analysis: NiMH and Li-S Case Studies"(Cranfield University, 2017-11-21 11:49) Fotouhi, Abbas; Auger, Daniel; Propp, Karsten; Longo, StefanoIn this study, battery model identification is performed to be applied in electric vehicle battery management systems. Two case studies are investigated: nickel-metal hydride (NiMH), which is a mature battery technology, and lithium-sulfur (Li-S), a promising next-generation technology. Equivalent circuit battery model parameterization is performed in both cases using the Prediction-Error Minimization (PEM) algorithm applied to experimental data. Performance of a Li-S cell is also tested based on urban dynamometer driving schedule (UDDS) and the proposed parameter identification framework is applied in this case as well. The identification results are then validated against the exact values of the battery parameters. The use of identified parameters for battery state-of-charge (SOC) estimation is also discussed. It is shown that the set of parameters needed can change with a different battery chemistry. In the case of NiMH, the battery open circuit voltage (OCV) is adequate for SOC estimation whereas Li-S battery SOC estimation is more challenging due to its unique features such as flat OCV-SOC curve. An observability analysis shows that Li-S battery SOC is not fully observable and the existing methods in the literature might not be applicable for a Li-S cell. Finally, the effect of temperature on the identification results and the observability are discussed by repeating the UDDS test at 5, 10, 20, 30, 40 and 50 degree Celsius. File created in MATLAB 2015a.Item Open Access Data for "Lithium-Sulfur Battery State-of-Charge Observability Analysis and Estimation"(Cranfield University, 2017-11-21 11:49) Fotouhi, Abbas; Auger, Daniel; Propp, Karsten; Longo, Stefano3.4 Ah Li-S cell pulse discharge test data at 30 degree. File created in MATLAB 2015a.Item Open Access Data for the paper "Analysis of Autopilot Disengagements Occurring during Autonomous Vehicle Testing"(Cranfield University, 2017-12-11 08:19) Lyu, Chen; Cao, Dongpu; Zhao, Yifan; Auger, Daniel; Sullman, Mark; Wang, HuajiData used in the paper "Analysis of Autopilot Disengagements Occurring during Autonomous Vehicle Testing".Item Open Access Data supporting "Optical Fibre Pressure Sensing Using a Frequency Modulated Laser-Based Signal Processing Technique"(Cranfield University, 2023-04-21 12:36) Barrington, James; James, Stephen; Kissinger, Thomas; Staines, Stephen; Prince, Simon; Alcusa Saez, Erica; Lawson, Nicholas; Tatam, RalphEach file contains the relevant data to the figure as stated in its name. Column headers within the file outline the variable and its associated unit. The authors, where possible, have tried to keep the data in its rawest, useable form in order to provide the greatest flexibility for future manipulation. All data files are formatted as csv for accessibility.