Error probabilities for MPU9250, flow deck and motors

Firmware/software/electronics/mechanics
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nkim324
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Posts: 2
Joined: Sat Apr 02, 2022 8:49 pm

Error probabilities for MPU9250, flow deck and motors

Post by nkim324 »

I am doing something called AADL Fault Modeling and Analysis Within an ARP4761 Safety Assessment
as seen here: https://resources.sei.cmu.edu/library/a ... tID=311884

In that, I need probability values for errors for the devices in Crazyflie2.0 which I am expanding with a flow deck.
Specifically, what is the probability of an error occurring in the readings of:

MPU9250:
-Accelerometer
-Gyroscope
-Magnetometer
VL53LOX (flow deck)
-X reading
-Y reading
Motors
-motor 1
-motor 2
-motor 3
-motor 4

Right now I have them set to 1.0e-9 which is unrealistic according to my instructor "OEMs usually do not publish them on a regular basis, except for military-grade ones".
tobias
Bitcraze
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Joined: Mon Jan 28, 2013 7:17 pm
Location: Sweden

Re: Error probabilities for MPU9250, flow deck and motors

Post by tobias »

Unfortunately we don't have those values either. There might be a chance of getting them from the sensor manufacturers.
MPU9250: TDK (Invensense)
VL53L0X: ST microelectronics
PMW3901: Pixart

For the motors pretty sure the manufacturer don't have any figure. My guess is that 10% of the motors would fail after 100 hours, if that is usable.
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