Pattern analysis on hypersonic inlet state of start/unstart

Recognition of hypersonic inlet start/unstart plays an important role in hypersonic engine. Especially if the inlet is unstarted, we should detect the state and restart it. In this work, some models are made to simulate the transformation of inlet states and the different operating modes are obtained. The properties of the obtained samples are discussed. We introduce three measures to compute the discernibility of sensors at different locations. Two locations for fixing sensors are provided. In the feature space, the task of recognizing the states of inlet is completely linearly separate.