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In this set of lectures we revisit from a contemporary perspective a classic problem of polaron theory using a hierarchy of increasingly sophisticated variational methods. Polaron structure is represented by variational surfaces giving the optimal values of the complete set of exciton and phonon amplitudes for every value of the joint exciton-phonon crystal momentum κ. Our variational methods include...
In this paper we derive, from a dependence graph, a rectangular parallel architecture for RLS parameter estimation. It has a number of advantages over the traditional triangular structure whilst maintaining the same throughput. These advantages are identical cells, easy expandability for increases in the number of parameters, reduced data flow, useful data is easily extracted and all these properties...
This paper examines the fault tolerant control problem for a generic class of incipient failure modes that grow in severity as a function of component loading. Assuming that a prognostic model is available to evaluate the risk of incipient fault modes growing into catastrophic failure conditions, then fundamentally the fault adaptive control problem is to adjust component loads to minimize risk of...
This work presents a power electronics health monitoring test platform for assessing modern power drives and electric machines with regeneration capabilities. This versatile platform combines data acquisition of critical system signals that are used for analysis as health indicators for the overall system and individual components such as power semiconductor devices. The test platform combines hardware...
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