Math Model Update Solution for Flight Simulators

StallBox is a flight simulator update solution designed to provide airlines and training centers with the stall models and instructor displays necessary to conduct Upset Prevention and Recovery Training (UPRT).

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Why the Need for StallBox?

Limitations of Current Level C/D FFS Stall Modeling

Since the regulatory requirements for Level D simulators have not mandated or formally recommended that the aerodynamics model provide representative data outside of the normal flight envelope of the aircraft, the typical coverage of the aerodynamics model has been limited. As shown in the illustration, typical aerodynamics models will have very good coverage for the normal flight envelope, but will have limited data at extreme conditions. As a result, these models are inadequate for comprehensive upset prevention and recovery training.

The StallBox Solution

StallBox Fills the Gap

StallBox provides the ability to upgrade existing flight simulators with enhanced, aircraft type-representative stall models without the need for aircraft OEM data sets or modifications to the existing baseline flight model code. This is accomplished by hosting the enhanced stall model in an external host computer (i.e., the “StallBox”) which requires only a lightweight code component to establish the communication link between the simulator host and the StallBox.

How StallBox Works

StallBox integrates with the existing flight simulator and is responsible for data monitoring, model implementation, model blending and data augmentation. In addition, StallBox communicates with the wired or wireless instructor displays.

Data Monitoring

In order to establish the communication between the simulator host and the StallBox, a lightweight interface code component is provided for insertion in real-time executive loop of existing simulator host. The typical communication protocol is Ethernet, but other protocols such as serial, MIL1553, SCRAMNet or shared memory can be readily accommodated. In the event that the established communication is disrupted or even completely disconnected, the operation of the simulator is not impacted and execution seamlessly and automatically returns to the baseline flight model. The StallBox Interface Control Document (ICD) that defines the data needed by the StallBox for monitoring and model update operation will be provided and BAR engineers will work with the customer to coordinate the StallBox implementation.

Model Implementation

The representative stall model for the selected aircraft is hosted in the isolated and independent environment of the StallBox computer. The basis of the model is a predictive- and empirically-derived model developed by BAR using methods developed in collaboration with the FAA and which is independent of aircraft OEM data. The model is delivered with the required Statement of Compliance (SOC) for both model as well as SME review (as required by the FAA NPRM) provided with FAA compliance.

Model Blending

In order to provide a smooth transition between the baseline aerodynamics database and the updated model behaviors, the StallBox provides application-specific, multi-variate data blending algorithms. The blending method is integrated in such a way that the existing stall warning is not affected and no existing QTGs are influenced.

Data Augmentation

The model update is introduced into the simulation host using the established communication connection between the StallBox and the host. The force and moment data in the host is updated and the model response is revised to reflect the representative stall behavior.

Instructor Displays

This capability provides for the incorporation of the FAA-recommended instructor displays and can be accomplished by modifying an existing IOS, integrating a wired desktop display, or incorporating a wireless tablet computer that communicates with the StallBox. For the tablet computer option, the instructor displays are reconfigurable to show a variety of Vn, α-β, PFD repeater, and pilot input display combinations. Color-coded tell tales provide instructors with quick interpretation of pilot response in stall. The tablet computer can also store, replay and optionally download stall data.

Benefits of StallBox

icon Stall Models

Type representative stall models provide realistic upset prevention and recovery training and meet FAA guidelines for stall modeling.

icon No OEM Data Required

Bihrle-developed stall models based on predictive and empirical data validated by Subject Matter Experts (SMEs) are available in the absence of OEM data.

icon Easy Installation

Typical installations can be accomplished in a couple of days with minimal impact to training schedules.

icon Instructor Displays

Instructor displays for upset prevention and recovery training can be integrated within an existing IOS or as add-on displays for desktop or mobile devices.

icon No Recertification

Since the StallBox implementation leaves the baseline flight model intact, no recertication of the baseline model is required.

icon Minimal Host Updates

Enhanced software models reside on the StallBox hardware rather than requiring complex code modifications to the baseline flight model.

icon Low Computational Load

Since enhanced models are executed on the StallBox hardware, minimal additional computational load is placed on the existing simulator.

icon Fail Safe Design

In the event that the StallBox is taken off-line, the simulator automatically and seamlessly reverts to the baseline flight model.

icon Future Expansion

The StallBox platform provides the ability to easily incorporate additional models for future training enhancements.

icon Affordable

Implemented as an external "black box" solution, the StallBox provides a cost-effective alternative to potentially costly software updates to the baseline flight model.

icon Competitive Advantage

StallBox allows training centers to immediately offer Upset Prevention and Recovery Training, thereby giving early adopters an advantage over their competition.

icon Available Now

StallBox provides a proven implementation that is immediately available to meet the proposed stall training requirements of regulatory authorities.

StallBox Specifications

StallBox incorporates the latest technologies to deliver a robust and reliable solution.

  • 1U rackmount or workstation configurations
  • Intel Core i7 Ivy Bridge processor
  • 256 Gb Solid State Drive (SSD)
  • 8 Gb SO-DIMM DDR3 Memory
  • Intel Wireless-N and Bluetooth
  • UPRT instructor displays app for iOS or Windows
For detailed information visit the StallBox web site