Mr. Malte-Jörn Maibach Profile

Malte-Jörn Maibach

at DLR, Institute of Flight Systems

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

SPIE Journal Paper | 21 October 2021 Open Access

Flying a helicopter with the HoloLens as head-mounted display

Christian Walko, Malte-Jörn Maibach

OE, Vol. 60, Issue 10, 103103, (October 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.10.103103

KEYWORDS: Head, Head-mounted displays, Holograms, Cameras, Calibration, Optical engineering, Optical tracking, Filtering (signal processing), Electromagnetism, Augmented reality

Read Abstract +

We describe the flight testing and the integration process of the Microsoft HoloLens 2 as head-mounted display (HMD) with DLR’s research helicopter. In the previous work, the HoloLens was integrated into a helicopter simulator. Now, while migrating the HoloLens into a real helicopter, the main challenge was the head tracking of the HoloLens, because it is not designed to operate on moving vehicles. Therefore, the internal head tracking is operated in a limited rotation-only mode, and resulting drift errors are compensated for with an external tracker, several of which have been tested in advance. The fusion is done with a Kalman filter, which contains a non-linear weighting. Internal tracking errors of the HoloLens caused by vehicle accelerations are mitigated with a system identification approach. For calibration, the virtual world is manually aligned using the helicopter’s noseboom. The external head tracker (EHT) is largely automatically calibrated using an optimization approach and therefore, works for all trackers and regardless of its mounting positions on vehicle and head. Most of the pretests were carried out in a car, which indicates the flexibility in terms of vehicle type. The flight tests have shown that the overall quality of this HMD solution is very good. The conformal holograms are almost jitter-free, there is no latency, and errors of lower frequencies are identical with the performance that the EHT can provide, which in combination greatly improves immersion. Profiting from almost all features of the HoloLens 2 is a major advantage, especially for rapid research and development.

DOWNLOAD PAPER

Proceedings Article | 12 April 2021 Presentation + Paper

Flying a helicopter with the HoloLens as head-mounted display

Christian Walko, Malte-Jörn Maibach

Proceedings Volume 11759, 117590F (2021) https://doi.org/10.1117/12.2588764

KEYWORDS: Head, Head-mounted displays, Error analysis, Cameras, Calibration, System identification, Reverse engineering, Neural networks, Light emitting diodes, Infrared radiation

Read Abstract +

This paper describes the flight testing and the integration process of the Microsoft HoloLens 2 as head-mounted display with DLR's research helicopter ACT/FHS. In previous work, the HoloLens was integrated into a helicopter simulator. Now, while migrating the HoloLens into a real helicopter, the main challenge was the head tracking of the HoloLens, because it is not designed to operate on moving vehicles. Therefore, the internal head tracking is operated in a limited rotation-only mode and resulting drift errors are compensated with an external tracker, various of which have been tested in advance. The fusion is done with a Kalman filter, which contains a nonlinear weighting. Internal tracking errors of the HoloLens caused by vehicle accelerations are mitigated with a system identification approach. For calibration, the virtual world is manually aligned using the helicopter's noseboom. The external head tracker is largely automatically calibrated using an optimization approach, and therefore works for all trackers and regardless of its mounting positions on vehicle and head. Most of the pre-tests were carried out in a car, which indicates the flexibility in terms of vehicle type. The flight tests have shown that the overall quality of this head-mounted display solution is very good. The conformal holograms are jitter-free, there is no latency and errors of lower frequencies are small enough, which greatly improves immersion. Profiting from almost all features of the HoloLens 2 is a major advantage, especially for rapid research and development.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years