Author Topic: How does SpaceX Falcon 9R/HR compete with EELV  (Read 29796 times)

Offline sublimemarsupial

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Re: How does SpaceX Falcon 9R/HR compete with EELV
« Reply #60 on: 03/15/2015 03:42 pm »

1. ULA still maintain a software integration laboratory.

2.  IIRC  they also offer the option to load customer software to run on the GNC hardware. Obviously the potential interactions have to be tested for.

3.  Note that while the core software is fairly static and most flight customization will be by changing variables in tables you will need to test those settings over the range of parameters the vehicle could be exposed to.  That demands a flight simulator that's as validated as the software that runs on the vehicle.

3.  There is no "flight simulator".  The  software integration laboratory is the an exact replicate of a flight vehicle's avionics.  The software is tested on the same hardware as what flies.

Huh? There most definitely is a flight simulator, something has to feed the correct inputs to the AVI sensors during hardware in the loop testing

Online LouScheffer

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Re: How does SpaceX Falcon 9R/HR compete with EELV
« Reply #61 on: 03/15/2015 10:42 pm »

3.  Note that while the core software is fairly static and most flight customization will be by changing variables in tables you will need to test those settings over the range of parameters the vehicle could be exposed to.  That demands a flight simulator that's as validated as the software that runs on the vehicle.

3.  There is no "flight simulator".  The  software integration laboratory is the an exact replicate of a flight vehicle's avionics.  The software is tested on the same hardware as what flies.
Huh?  So every time they run the software, it fires up an RD-180 on the test stand?

In all seriousness, they must have something that takes the output from the avionics to the rocket, predicts what the rocket would do, and fakes the accelerometer, pressure, temperature, and other readings.  And this software needs to be just as validated as the software that actually flies.

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