Browsing by Author "Whidborne, James F."

Browsing by Author "Whidborne, James F."

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  • Towards Autonomy of a Quadrotor UAV 
    Cowling, Ian (Cranfield University, 2008-10)
    As the potential of unmanned aerial vehicles rapidly increases, there is a growing interest in rotary vehicles as well as fixed wing. The quadrotor is small agile rotary vehicle controlled by variable speed prop rotors. ...
  • Tuning Class E Inverters Applied In Inductive Links Using Saturable Reactors 
    Aldhaher, Samer; Luk, Patrick Chi-Kwong; Whidborne, James F. (IEEE Institute of Electrical and Electronics, 2014-06-01)
    This paper investigates the performance of Class E inverters used in wireless power transfer applications based on resonant inductive coupling. The variations in the load and the distance between the coils cause Class E ...
  • A Unified Closed-Loop Stability Measure for Finite-Precision Digital Controller Realizations Implemented in Different Representation Schemes. 
    Wu, Jun; Chen, Sheng; Whidborne, James F.; Chu, Jian (IEEE Institute of Electrical and Electronics, 2003-05-01)
    A computationally tractable unified finite word length closed-loop stability measure is derived which is applicable to fixed-point, floating-point and block- floating-point representation schemes. Both the dynamic range ...
  • A unifying framework for finite wordlength realizations 
    Hilaire, Thibault; Chevrel, Philippe; Whidborne, James F. (IEEE, 2007-08)
    A general framework for the analysis of the finite wordlength (FWL) effects of linear time-invariant digital filter implementations is proposed. By means of a special implicit system description, all realization forms ...
  • Venturi multiphase flow measurement based active slug control 
    Nnabuife, Somtochukwu Godfrey; Whidborne, James F.; Liyun Lao, Liyun; Cao, Yi (IEEE, 2019-11-11)
    Riser slug flow poses a significant challenge to offshore oil production systems, most especially for oil fields in their later life. Active control of slugging through choking has been proven a practical approach in ...
  • Visual flight rules-based collision avoidance systems for UAV flying in civil aerospace 
    Alturbeh, Hamid; Whidborne, James F. (MDPI, 2020-02-25)
    The operation of Unmanned Aerial Vehicles (UAVs) in civil airspace is restricted by the aviation authorities, which require full compliance with regulations that apply for manned aircraft. This paper proposes control ...
  • Wake Vortex Modelling and Simulation for Air Vehicles in Close Formation Flight 
    Saban, Deborah (Cranfield University, 2010-01)
    The aim of this research is to develop realistic models of aerodynamic cross-coupling e ects that can be incorporated in real-time or near real-time simulations of Unmanned Aerial Vehicles (UAVs) in close formation flight. ...
  • Wind preview-based model predictive control of multi-rotor UAVs using LiDAR 
    Mendez, Arthur P.; Whidborne, James F.; Chen, Lejun (MDPI, 2023-04-03)
    Autonomous outdoor operations of Unmanned Aerial Vehicles (UAVs), such as quadrotors, expose the aircraft to wind gusts causing a significant reduction in their position-holding performance. This vulnerability becomes more ...
  • ℒ1 adaptive control of quadrotor UAVs in case of inversion of the torque direction 
    Souanef, Toufik; Whidborne, James F.; Boubakir, Ahsene (SCIE Publish, 2023-10-10)
    This paper presents a method for fault tolerant control of quadrotor UAVs in case of inversion of the torque direction, a situation that might occur due to structural, hardware or software issues. The proposed design is ...
  • ℒ1 adaptive path-following of airships in wind 
    Souanef, Toufik; Whidborne, James F.; Liu, Shi Qian (World Scientific, 2023-05-06)
    This paper proposes an adaptive, three dimensional (3D) path-following controller for airships in the presence of wind disturbances, which explicitly considers that wind speed is time-varying. The main idea is to formulate ...