Entrophy Analysis of Feedback Flight Dynamic Control Systems.

摘要

This report is a study of the application of the entropy function of information theory to the analysis of sampled data systems so characteristic of the evolving and important field of digital flight control, including multimode systems. The systems studied are both feed-forward and feedback with the emphasis placed on the regulator problem. The feature common to all the configurations is the presence of a sensor which measures the input signal and which has an output that is usually some random function of the input. For the purposes of the analysis it is convenient to describe the behavior of the sensor by its Sensor Channel Transmittance, which is defined as the mutual information between the input and output of the measuring device. This quantity is not independent of the properties of the input signal; however, in any given problem it need only be calculated once. This research is important because it imbeds the control problem in the communication problem and clearly demonstrates the manner in which the information handling capability of the system elements limits performance, and is, therefore, of considerable potential significance to advanced flight dynamic systems.