Eigenmode Distortion: A New Perspective on Motion Cueing Fidelity in Flight Simulation

Miletović, I.; Pavel, Marilena D.; Pool, Daan M.; Stroosma, Olaf; Paassen, M. M. van; Mulder, Max; Wentink, M.

doi:10.2514/1.g005596

Cited by 2 publications

(1 citation statement)

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“…COHAM advances the state-of-the-art in centrifuge simulator motion cueing [37][38][39], a problem even more challenging than motion cueing for common 6-DOF Stewart platforms which are typically based on classical washout [40][41][42], robust control [43], tuned using insights from pilot models or behavior [44][45][46], and modal analysis [47].…”

Section: Introductionmentioning

confidence: 99%

Mitigating Coriolis Effects in Centrifuge Simulators Through Allowing Small, Unperceived G-Vector Misalignments

Mkhoyan¹,

Wentink²,

Graaf³

et al. 2022

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When coupled with additional degrees of freedom, centrifuge-based motion platforms can combine the agility of hexapod-based platforms with the ability to sustain higher G-levels and an extended motion space, required for simulating extreme maneuvers. However, the false and often nauseating sensations of rotation, by Coriolis effects induced by the centrifuge rotation in combination with rotations of the centrifuge cabin or the pilot's head, are a major disadvantage. This paper discusses the development of a motion filter, the Coherent Alignment Method (COHAM), which aims at reducing Coriolis effects by allowing small mismatches in the G-vector alignment, reducing cabin rotations. Simulations show that as long as these mismatches remain within a region where humans perceive the G-vector as 'coherent', the Coherent Alignment Zone (CAZ), the cabin angular accelerations can indeed be reduced. COHAM was tested in a high G-maneuver task with a fixed CAZ threshold obtained in a previous study. It was experimentally compared to an existing motion filter, using metrics such as sickness, comfort and false cues. Results show that sickness, dizziness and discomfort are reduced, making the centrifuge sessions more bearable. It is recommended to further improve the filter design and tuning, and test it with more fighter pilots.

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