Abstract: A temperature measurement system includes first and second temperature measurement sections for a plurality of small regions, a temperature deviation calculation section configured to obtain a temperature deviation between a first measured temperature and a second measured temperature, change rate calculation sections configured to obtain a first temperature change rate in the first measured temperature and a second temperature change rate in the second measured temperature, representative change rate calculation sections configured to obtain a representative change rate relating to the first temperature change rate and the second temperature change rate for each of the small regions, and change rate abnormality determination sections configured to compare the representative change rate with the first temperature change rate and the second temperature change rate used in calculation of an abnormality deviation exceeding a temperature deviation threshold value and determine whether or not the first and second

Abstract: A torque estimation apparatus (12) of a helicopter (10) stores in a storage apparatus (14) a measurement point that is a measured value of the torque of an engine (28) with respect to a measured value of an engine performance parameter that relates to performance of the engine that rotates a rotor (26) together with a time at which the measurement point is measured, generates an approximate expression based on the measurement point that is stored in the storage apparatus (14), and estimates the amount of a utilizable torque based on the generated approximate expression.

Abstract: This invention easily estimates the amount of a utilizable torque in real time based on limited engine performance parameters, regardless of abrupt variations in the engine performance. A torque estimation apparatus (12) of a helicopter (10) stores in a storage apparatus (14) a measurement point that is a measured value of the torque of an engine (28) with respect to a measured value of an engine performance parameter that relates to performance of the engine that rotates a rotor (26) together with a time at which the measurement point is measured, generates an approximate expression based on the measurement point that is stored in the storage apparatus (14), and estimates the amount of a utilizable torque based on the generated approximate expression.