SIMEX UPRT 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 SIMEX UPRT host which requires only a lightweight code component to establish the communication link between the simulator host and the UPRT host. The following diagram depicts how the SIMEX UPRT solution integrates with the existing flight simulator and the primary functions performed by the SIMEX UPRT are detailed in the following subsections.



In order to establish the communication between the simulator host and the SIMEX UPRT BOX, 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 SIMEX UPRT Interface Control Document (ICD) that defines the data needed by the SIMEX UPRT for monitoring and model update operation will be provided and SIMEX engineers will work with the customer to coordinate the SIMEX UPRT implementation.

Model Implementation


The representative stall model for the selected aircraft is hosted in the isolated and independent environment of the SIMEX UPRT computer. The basis of the model is a predictive- and empirically derived model developed by SIMEX using methods developed in collaboration with the FAA and which is independent of aircraft OEM data.


Feedback Model

The model update is introduced into the simulation host using the established communication connection between the SIMEX UPRT 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.

UPRT Simex