Display Latency Study

Objective:

The objective of the display latency study is to determine the effects of display latency of multi-layered displays on aircraft controllability, pilot workload, and performance.

Equipment:

To implement the display latency study, OPL will render each display layer individually and merge them to a single display using a DVI merging board. The merge board also allows for programmable delay registers on each input. The study takes place in the OPL Boeing 737 simulator.

research Methods:

The display latency study will focus on synthetic and enhanced vision display formate. The individual layers that make up the merged display are 2D symboloby, synthetic terrain, highway-in-the-sky guidence, and forward-looking infared (FLIR) insets. Each individual layer will be assigned different latencies ranging from 10 ms to 1s. Latencies will be determined by estimating real-world factors that could lead to a layer being latent . Possible factors that could lead to latency include graphics processor speed, computation complexity, and data base querying.

Subjects will fly four flight maneuvers to determine display latency effects. The four tasks the pilot will perform are:

1. Instrument approach with pathway guidance

2. Circling to land from map with reference to synthetic terrain

3. Roll and altitude capture

4. Wingover

Measures of effectiveness include frequency and magnitude of control input changes, workload assessment, and deviations of pilot performance per run.

Sponsors and partners

Rockwell Collins

projects:

Spatial Orientation Enhancement System (SOES)
Display Latency