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A novel online diagnostic algorithm for mechanical faults of electrical machines with variable speed drive systems is presented in this paper. Using Wavelet Packet Decomposition (WPD), a set of feature coefficients, represented with different frequency resolutions, related to the mechanical faults is extracted from the stator current of the induction motors operating over a wide range of speeds. A...
Let Fq be the finite field of q elements and A=Fq [X]/(Xn-1) be the algebra of q-ary polynomials modulo X n-1. The 1-generator quasi-cyclic (QC) code of block length nm over Fq, of index a divisor of m, with generator alowbar(X)=(ai(X))0m-1 is the A-cyclic submodule of Am defined as Aalowbar(X)={(lambda(X)ai(X))0m-1 ,lambda(X)isin A}, under the module operation lambda(X)Sigmai=0mai(X)Yi =Sigmai=0...
The agility, sense of smell, hearing and speed of dogs is put to good use by dedicated canine teams involved in search and rescue operations. Perhaps the weakest link in the human-dog team is the human. In comparison to dogs, humans hear less, cannot effectively follow a scent and actually slow the dog down when involved in area searches. To mitigate this problem the Network-Centric Applied Research...
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