The invention relates to the technical field of industrial control and equipment fault prediction, in particular to a tunnel furnace
combustion array fault positioning method based on
time sequence temperature data, which comprises the following steps: acquiring temperature data of each temperature zone, calculating a control loop deviation, determining neighborhood thermal compensation
potential energy based on the control loop deviation and a preset asymmetric
coupling coefficient, and determining the fault of a
combustion array of a tunnel furnace according to the neighborhood thermal compensation
potential energy. The
convection covering strength is determined by combining the temperature change rate of the temperature zone and the
noise reference, stagnation characteristics covered by
heat flow are identified, and the performance
degradation index of the
combustion head corresponding to the temperature zone is determined based on the change characteristics of the
convection covering strength along with time; and carrying out dynamic correction on the
prediction residual error of the autoregression integral
moving average model by using the performance
degradation index, and carrying out fault positioning according to the autoregression integral
moving average model after dynamic correction. According to the method, thermal compensation of the adjacent temperature zones can be stripped from the
strong coupling thermal field, and accurate positioning of the early-stage micro-blockage fault of the combustion head covered by the
heat flow is achieved.