A Cybernetic Approach To Assess

This paper presents the results of an experiment in which a cybernetic approach has been used to investigate the effect of motion filter setting changes and display type on simulator fidelity. Pilot control behavior, pilot remnant, open loop behavior, open loop performance and subjective evaluations in a real jet-aircraft were compared with that in a high-fidelity motion base simulator. The task studied was a pitch-tracking following task. Peripheral information was omitted from the experiment. The results from the flight tests, in the first phase of the experiment, were used to tune and validate simulator models and settings for the simulator tests in the second phase of the experiment. These flight test results are also used as a base-line condition to which the results from the simulator tests are compared. Two types of displays were used in the experiment, a compensatory and pursuit display, and in the simulator, a set of nine different motion filter settings. Results show only slight differences in pilot control behavior and open loop behavior between the aircraft and the simulator, between the different motion filter settings in the simulator, and between the two display types used. A more significant effect is found on the pilot injected noise level and consequently on the open loop performance. Analytical biases and variances are calculated for the estimated open loop describing functions. The applied cybernetic approach has provided objective and accurate results, which makes this technique suitable for more extensive research on simulator fidelity in the future.

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