  Due to the high cost and reliability of sensors, the designers of a pump
reduce the needed number of sensors for the estimation of the feasible
operating point as much as possible. The major challenge to obtain a good
estimation is the low amount of data available. Using this amount of data, the
performance of the estimation method is not enough to satisfy the client
requests. To solve this problem of scarcity of data, getting high quality data
is important to obtain a good estimation. Based on these considerations, we
develop an active learning framework for estimating the operating point of a
Modular Multi Pump used in energy field. In particular we focus on the
estimation of the surge distance. We apply Active learning to estimate the
surge distance with minimal dataset. Results report that active learning is a
valuable technique also for real application.
