Title :
Identification of transfer functions with time delay and its application to cable fault location
Author :
Pintelon, R. ; Van Biesen, L.
Author_Institution :
Dept. ELEC, Vrije Univ. Brussel, Belgium
fDate :
6/1/1990 12:00:00 AM
Abstract :
A Gaussian frequency-domain maximum likelihood estimator (MLE) to estimate the transfer function of linear continuous-time systems with time delay is presented. The stochastic framework is an errors-in-variables model, which means that the input as well as the output of the system is disturbed with noise. The estimator is applied to a practical measurement problem, namely the estimation of the location of discontinuities, e.g. faults in electrical cables from a reflectogram. Experimental results for coaxial lines show that it is possible to identify simultaneously the location of the discontinuity and a rational approximation of the generator mismatch, the fault impedance, and some of the cable parameters
Keywords :
coaxial cables; delays; estimation theory; fault location; random noise; stochastic processes; time-domain reflectometry; transfer functions; Gaussian frequency-domain maximum likelihood estimator; cable fault location; coaxial lines; discontinuities; discontinuity; errors-in-variables model; fault impedance; linear continuous-time systems; mismatch; reflectogram; time delay; time domain reflectometry; transfer functions; Coaxial cables; Delay effects; Delay estimation; Electric variables measurement; Fault diagnosis; Frequency estimation; Maximum likelihood estimation; Stochastic resonance; Stochastic systems; Transfer functions;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
