Information processing device, information processing method, and non-transitory recording medium

An information processing method, by a calculation processing device, comprising:

• calculating a degree of suitability between observation information and prediction information, the observation information observed for a system suffering an effect from an certain device operated in accordance with a manipulation amount, the prediction information predicted in accordance with a model for a state of the system, the model including a parameter of a noise of the manipulation amount;
• calculating the parameter of the noise in the model in case that the calculated degree of suitability is greater than a predetermined threshold;
• calculating a control gain for controlling the manipulation amount for the certain device in accordance with a predetermined relevance that the manipulation amount is decreased toward an increase of the parameter of the noise;
• and
• determining that an abnormality occurred for the certain device when the calculated noise satisfies a predetermined determination condition.

A non-transitory recording medium storing an information processing program causing a computer to achieve:

• a degree calculation function configured to calculate a degree of suitability between observation information and prediction information, the observation information observed for a system suffering an effect from an certain device operated in accordance with a manipulation amount, the prediction information predicted in accordance with a model for a state of the system, the model including a parameter of a noise of the manipulation amount;
• a difference calculation function configured to calculate the parameter of the noise in the model in case that the calculated degree of suitability is greater than a predetermined threshold;
• a function configured to calculate a control gain for controlling the manipulation amount for the certain device in accordance with a predetermined relevance that the manipulation amount is decreased toward an increase of the parameter of the noise;
• and
• a function configured to determine that an abnormality occurred for the certain device when the calculated noise satisfies a predetermined determination condition.