Requirements on Simulators Used in Handling Qualities Research

Abstract

A methodology has been developed for driving the visual display and motion systems of a large-amplitude and rotational 3-axis flight simulators to minimize the impact of the constraints of pilot subjectivity and task dependence. In explaining the drive technique, a simple model of the sensing mechanisms of the vestibular system is used. However, a way has not been found yet to take advantage of the vestibular system description to establish the dynamic performance required of the elements in the motion and visual display system. The success of the drive scheme depends on subjective observations of test pilots which allow filters used in the drives to be properly set in terms of gain and break frequency; the filter characteristics also are task-dependent. Experiments conducted on the simulators provide some assurance that the drive technique works within these constraints. The first of a series of experiments being conducted on the large-amplitude, 3-axis simulator to develop a rationale for motion and visual display drives for moving base simulators is discussed in which a comprehensive simulation of the Cornell T-33 inflight simulator has been mechanized. Flight experiments have been repeated on the simulator. Results of this work suggest that a mix of simulators be used to study the problems associated with fighter-bomber mission effectiveness and handling qualities.