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Watkins, John

Works: 8 works in 16 publications in 3 languages and 87 library holdings
Genres: Charters and articles of incorporation 
Roles: Author
Publication Timeline
Publications about John Watkins
Publications by John Watkins
Most widely held works by John Watkins
Viruses from space and related matters by Fred Hoyle( Book )
3 editions published in 1986 in English and held by 70 libraries worldwide
Parameter Set Estimation of Time Varying Systems by John Watkins( Book )
6 editions published in 1995 in English and held by 5 libraries worldwide
Parameter set estimation (PSE), a class of system identification schemes which aim at characterizing the uncertainty in the identification experiment, will play a vital role in robust identification for control. An important step in current research along these lines is development of PSE algorithms for systems which are time varying in nature; this is particularly true if the identified model set is to be used in an adaptive setting. In this dissertation, the Optimum Volume Ellipsoid (OVE) algorithm for parameter set estimation of time-invariant systems is extended to time-varying systems. Building on this development of the OVE algorithm for Time-Varying systems (OVETV), two algorithms are also presented for reducing the computational complexity of the optimal time update equations. These algorithms, scalar addition and scalar multiplication, reduce the computational complexity of the time update equations by constraining the new ellipsoid to be parameterized by the previous ellipsoid and a single new parameter. Following this, extensions to the OVE and OVETV algorithms are presented. The algorithms are extended to handle multiple-input, single-output (MISO) systems. It is shown how knowledge of dependencies in the parameter variations can be exploited to reduce the number of computations in the resulting algorithm. We show how the scope of OVE-ISP, an OVE-based input synthesis procedure, can be extended to handle systems with known transportation lag. Lastly, it is shown how the OVE and OVETV algorithms can be utilized for fault detection and isolation (FDI). Two methods are suggested for detecting faults in dynamical systems. The first method relies on a consistency check which is integral to the OVE and OVETV algorithms, while the second method utilizes an ellipsoid intersection test to detect a fault
Grant ( Archival Material )
1 edition published in 1604 in Latin and held by 1 library worldwide
Grant by Henry Best and John Hallywell of London, gentleman, to David Williams, sergeant-at-law, of 2 parts of several parcels of escheated land within the manor of "Haia Walton'" near "Welchaye" in the county of "Breton," lately of Jenkyn Thomas the Younger and afterwards of a certain William Thomas and now or late int he occupation of Thomasina Thomas, late the wife of the aforesaid William, which land is called by the name "Parke y Brayne," with all that messuage now or late in the tenure or occupation of Weatilde Vehan, or her assigns, which they had by letters patent dated 14 March 42 Elizabeth, advowsons etc. With appointment of Mathew Skilman attorney to deliver seisin; and endorsed with note of livery of seisin. Signed Math: Skilman atton' p'd'. David Thomas, Oliver Jones, Thomas Sunter
Alternative Names
Watkins, J. (John)
English (14)
Latin (1)
Welsh (1)
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