The Force is With You - The Apparent Vertical Filter Concept

Seehof, Carsten; Buch, Jan-Phillipp; Raab, Christian

doi:10.2514/6.2017-3474

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The assurance of adequate motion simulation has been a large field of research for motion simulators in the past [5]- [11]. To find the best way to represent the free motion of an aircraft in the limited space of the motion platform is not trivial to solve and different motion cueing algorithms have been developed in the past to address this problem.…”

Section: Introductionmentioning

confidence: 99%

Simulating Flexible Aircraft in a Full Motion Simulator

Schwithal

Buch

Seehof

et al. 2023

AIAA AVIATION 2023 Forum

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Classical flight dynamics analyses and pilot-in-the-loop simulations are traditionally based on rigid-body aircraft models. The assumption of rigid aircraft is acceptable for classical aircraft designs. However, present ecological and economical constraints require modern passenger aircraft to become more efficient and reduce their emissions. This leads to optimized aircraft designs with light structures and high aspect ratios, which exhibit an increased aeroelastic flexibility. These modern more flexible aircraft do not necessarily allow the assumption of rigid-body modeling approaches anymore but require the inclusion of structural flexibility for flight dynamics analyses and handling qualities assessments. This also affects pilot-in-the-loop simulations in a full-motion simulator, where the consideration of structural flexibility is no common practice. The present paper describes the preparation of an extensive simulator campaign with a flexible aircraft. It addresses the question of how to integrate the oscillations resulting from the structural flexibility into the motion filter of the simulator to achieve a realistic feeling of the flexible modes.1 Research scientist, AIAA Member. 2 Research scientist. 3 Research scientist. 4 Flight Control Engineer. 5 Product Development Engineer. 6 Senior Flight Control Engineer, AIAA Member.

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Section: Introductionmentioning

confidence: 99%

Simulating Flexible Aircraft in a Full Motion Simulator

Schwithal

Buch

Seehof

et al. 2023

AIAA AVIATION 2023 Forum

Self Cite

View full text Add to dashboard Cite

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Towards Mission Readiness – Applying the Objective Motion Cueing Test to the Apparent Vertical Filter

Seehof

Buch

Schwithal

2022

AIAA AVIATION 2022 Forum

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Flight training simulators have a limited capability to replicate aircraft motion cues because the space envelope of current motion systems impedes a better fidelity and urges the user to make sometimes painful compromises. Therefore, it is all the more important to use the given space envelope as well as possible. But this trivial consideration yields an answer to the question what "good" means and therefore what strategy shall to be pursued by a control algorithm. For the Apparent Vertical Filter (AVF) this means that the amount and direction of the force combined with the corresponding rotational velocity shall be met as long as the given space envelope allows that approach. If this is not possible anymore the direction of the specific force shall be reproduced correctly. Only if both, the rotational and the translational cueing cannot be achieved a decision must be made. This is the case e.g. for the side force during a taxi turn on ground. During such maneuvers a compromise needs to be found between a correct specific force and a limited rotational velocity of the simulator. Within this paper the working principle of the Apparent Vertical Filter will be discussed for a taxi turn on ground maneuver. Furthermore, it will give a general overview of the AVF response to lateral maneuvers in general. Finally, it presents the results for the lateral tests of the Objective Motion Cueing Test (OMCT) showing that, in general, the AVF is able to meet the requirements of the test.

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The Force is With You - The Apparent Vertical Filter Concept

Cited by 2 publications

References 3 publications

Simulating Flexible Aircraft in a Full Motion Simulator

Simulating Flexible Aircraft in a Full Motion Simulator

Towards Mission Readiness – Applying the Objective Motion Cueing Test to the Apparent Vertical Filter

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