Browsing by Author "Whidborne, James"
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Item Open Access A Benchtop Flight Control Demonstrator - Data and Code(Cranfield University, 2019-09-10 09:28) Duran, Joris; Whidborne, James; Pontillo, Alessandro; alejandro Carrizales rodriguez, MartinCodes and data for "A benchtop flight control demonstrator" J R Duran, J F Whidborne, M Carrizales Rodriguez, A Pontillo International Journal of Mechanical Engineering Education Published online July 27, 2019 doi: 10.1177/0306419019852688CodesFlight-Desk-Control-Demonstrator-master.zip - GUI on a computer programmed in JAVA - PID Controller for ArduinoExperimental Results- Test open loop.xls- Test P.xls- Test PID.xlsFluent CFD Fileswindtunnel.casWindtunnel.jouWindtunnel_refine.meshdatJavaFoil filescriptJaveFoilMicrosoft Excel Windtunnel design worksheetWind Tunnel Design V2.xlsmCATIA CAD filesCAD-CATIA.zipMSc DissertationDuran JR. Flight Desk Control Demonstrator. MSc dissertation, Cranfield University, Bedfordshire, U.K., 2018. Available at: http://dspace.lib.cranfield.ac.uk/handle/1826/14154Item Open Access Aerodynamic analysis of Saab 340B aircraft with data fusion implementation(AIAA, 2024-01-04) Sahin, Kadir; Gomec, Fazil; Millidere, Murat; Whidborne, JamesThis paper conducts an aerodynamic analysis of the Saab 340B passenger aircraft, employing AVL and as numerical methods and DATCOM as a collection of engineering methods and empirical data that provide a set of aerodynamic coefficients for assessment. The investigation is focused on examining the longitudinal aerodynamic behavior of aircraft, specifically considering the impacts of flaps and elevators at varying angles of attack. The outcomes from the clean configuration are compared with the results obtained from computational fluid dynamics studies found in existing literature. While the results may not precisely match, they capture the general trends in the behavior of the aircraft. This aligns with the expected outcomes from preliminary methods like AVL and DATCOM. Data fusion techniques are strategically employed to integrate insights from these diverse sources, enhancing the overall accuracy and reliability of the aerodynamic assessment. The research aims to provide a comprehensive understanding of the clean configuration's aerodynamic performance, contributing significantly to the advancement of aviation technology.Item Open Access Data: Two-phase Gas-Liquid Flow Regimes Identification in an S-shape Pipeline-Riser Using Doppler Ultrasonic Sensor(Cranfield University, 2023-09-08 15:29) Godfrey Nnabuife, Somtochukwu; Whidborne, James; Lao, LiyunDifferent flow regime data was generated experimentally at Cranfield University using a 2-inch multi-phase flow S-shape pipeline-riser test loop. In order to obtain the desired flow regime condition, the air-water flow rate was automatically regulated using the DeltaV system. Allfiles.Mat contains all the Air (Sm3/hr) - Water (Kg/s) flow regime conditions investigated. The data was recorded using the LabVIEW program but converted to a MATLAB file for easy access. All the flow conditions that fall under category 1 are in slugging condition, all that fall into category 2 are in bubbly condition, the ones that fall under category 3 are in churn flow condition and the ones that fall under category 4 are in annular flow condition. Data_wave2.mat is also a MATLAB file that contains all the flow conditions investigated. It contains the same data as in Allfiles.mat. You can use either Data_wave2.mat or Allfiles.mat files.Item Open Access Extremum Seeking Control for Truck Drag Reduction(Cranfield University, 2018-06-20 16:09) Whidborne, James; Garry, KevinMATLAB/Simulink codes for "Extremum Seeking Control for Truck Drag Reduction" G Papageorgiou, J Barden, J Whidborne, K Garry 12th UKACC International Conference on Control Sheffield, UK, 5th - 7th September 2018 Videos: converge.mp4 - shows ESC controller convergence with Speed controller reference, Vr=24 m/s Initial deflector height limits, deltaH=1.16 Gradient and wind speed are set to zeroItem Open Access Ground Vibration Testing of a High Aspect Ratio Wing with Revolving Clamp(Cranfield University, 2022-12-01 09:17) Dessena, Gabriele; Ignatev, Dmitrii; Whidborne, James; Pontillo, Alessandro; Zanotti Fragonara, Luca33rd Congress of the International Council of the Aeronautical Sciences (ICAS). Abstract: The advancements in the aeronautical industry and research on materials and manufacturing methods in the last 70 years have been shifting the paradigm of wing design to high aspect ratio flexible wings. These wings can show a varying behaviour in different operating conditions, as per the nature of their geometry and materials. This work proposes a case study of a high aspect ratio flexible wing in order to study the effect of operating conditions on its structural properties. To test different operating conditions on the ground, a revolving clamp is designed to attach the specimen to a clamp-on shaker. A clear relationship between the wing’s modal properties, and so structural properties, and the angle the clamp sets is found.Item Open Access MATLAB code of examples of solving optimal control problems using the Chebfun system(Cranfield University, 2022-10-03 15:44) Whidborne, JamesMATLAB code of examples of solving optimal control problems using the Chebfun system. liftdragpolar.m - Lift-Drag Polar Example kaiserdiagram.m - Minimum Time to Climb (Kaiser diagram) intercept.m - Intercept Problem trajplanner.m - Minimum Time Trajectory Planning Problem Requires the Chebfun system Please acknowledge and reference via: J.F. Whidborne. Solving optimal control problems using the Chebfun systeml, UKACC Control 2016, Befast, U.K. September 2016. (doi:10.1109/CONTROL.2016.7737522)Item Open Access SAAB 340B aerodynamic model development using binary particle swarm optimization(AIAA, 2024-01-04) Millidere, Murat; Alam, Mushfiqul; Place, Simon; Whidborne, Jameshis paper follows-up previous work on the development of a high-fidelity Saab 340B aerodynamic model using system identification methods. In the prior work, Saab 340B flight tests were carried out using different excitations on the control surfaces. The flight test data was collected at predefined trim points. Thrust forces and moment were obtained using the propeller efficiency map provided by the manufacturer. The equation and output error methods were employed to analyse flight test data to estimate aerodynamic parameters in the time domain. This paper follows-up previous work on the development of a high-fidelity Saab 340B aerodynamic model using system identification methods. In the prior work, Saab 340B flight tests were carried out using different excitations on the control surfaces. The flight test data was collected at predefined trim points. Thrust forces and moment were obtained using the propeller efficiency map provided by the manufacturer. The equation and output error methods were employed to analyse flight test data to estimate aerodynamic parameters in the time domain. The paper extends the work to select independent variables in the equation error method in an optimal way using binary particle swarm to determine the best subset of independent variables. The impact of the hyperparameters of the binary PSO approach such as the transfer function scheme, inertia weight updating strategy, and the value of acceleration coefficients is investigated.Item Open Access Simulink/MATLAB code of simulation of L-1 adaptive control for a quadrotor subject to actuator faults(Cranfield University, 2022-10-03 15:56) Whidborne, JamesSimulink/MATLAB code of simulation of L-1 adaptive control for a quadrotor subject to actuator faults. QuadrotorL1initialize.m - Initialize Simulink code for simulation of L_1 adaptive control of a quadrotor QuadrotorL1adaptive.slx - Simulink code for simulation of L_1 adaptive control of a quadrotor QuadrotorLQRIinitialize.m - Initialize Simulink code for simulation of baseline LQR controller + integral action for a quadrotor QuadrotorLQRI.slx - Simulink code for simulation of baseline LQR controller + integral action for a quadrotor Additional codes can be downloaded from l1-adaptive-control-tutorials Please acknowledge and reference via: D. Xu, J.F. Whidborne and A. Cooke. Fault tolerant control of a quadrotor using L-1 adaptive control. International Journal of Intelligent Unmanned Systems.4(1):43-66, 2016. (doi:10.1108/IJIUS-08-2015-0011)Item Open Access The Effect of Rotor Tilt on the Stability and Gust Rejection Properties of VTOL Multirotor Aircraft - MATLAB Codes(Cranfield University, 2022-01-04 11:11) Whidborne, JamesVideo visualization and MATLAB files and routines to generate figures, video and some results of paper "The Effect of Rotor Tilt on the Stability and Gust Rejection Properties of VTOL Multirotor Aircraft" by James F. Whidborne, Arthur Mendez and Alastair CookeRun the script MultiRotorGust.m to generate all the figures & the video in the paper.