PROBLEM TO BE SOLVED: To provide a system capable of estimating the movement of a person or the like based on the measured value of a sensor mounted on the trunk of the person or the like. SOLUTION: In the system of the present invention, a plurality of parts in a person or the like at an estimated time using a value measured by a sensor in time series over a first time width before a reference time by an operation estimating means 10. Outputs the position estimate of. The motion estimation means 10 includes a learning sensor measurement value measured while a person or the like is performing a predetermined motion by learning according to an algorithm of a machine learning model, and a plurality of parts of the person or the like at the time of the measurement. The time difference with respect to the measurement time is the same as the time difference with the estimated time with respect to the reference time based on the learning sensor measurement value over the first time width before the measurement time of each learning sensor measurement value using the teacher's position reference value. It is configured to output teacher position reference values of a plurality of predetermined parts in the body of a person or the like at the reference time. The estimated time may be after the lapse of the second time width from the reference time, in which case the future movement of a person or the like is predicted. [Selection diagram] Fig. 1【課題】人等の体幹に装着されたセンサの計測値に基づいて人等の動作を推定できるシステムを提供する。【解決手段】本発明のシステムは、動作推定手段１０が基準時刻以前の第一の時間幅に亙ってセンサが時系列に計測した値を用いて推定時刻の人等に於ける複数の部位の位置推定値を出力する。動作推定手段１０は、機械学習モデルのアルゴリズムに従った学習により人等が所定の動作をしている間に計測された学習用センサ計測値とその計測の際の人等に於ける複数の部位の教師用位置参照値を用いて各学習用センサ計測値の計測時刻以前の第一の時間幅に亙る学習センサ計測値に基づいて計測時刻に対する時間差が基準時刻に対する推定時刻の時間差と同一の正解参照時刻の人等の身体に於ける複数の所定部位の教師用位置参照値を出力するよう構成される。推定時刻は、基準時刻から第二の時間幅の経過後でよく、その場合、人等の将来の動作の予測がなされる。【選択図】図１
