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Re: [Paparazzi-devel] simultaneously using two autopilot systems for rel
Christophe De Wagter
Re: [Paparazzi-devel] simultaneously using two autopilot systems for reliability
Tue, 9 Apr 2013 21:47:37 +0200
Extra Servo's: can improve safety. They wear over time, having spare is useful.
Extra wires & connectors: does certainly not improve safety.
Extra satelite receiver: expecially in RC mode that is considered as a very good thing to do
Extra autopilot running the same code? when using the same imu/gps types with same ahrs, it will most likely give the same attitude errors in that particular flight case. So this only solves pure hardware malfunctions (broken chip) by adding extra wires (which typically break more easily than chips inflight) and connections and adding extra code to detect malfunctions.
My personal idea is that with a good hardware redesign placing both autopilots with their separate shielding and power on a single PCB, without connectors but with protecting line drivers, tvs and ferrites on all lines it can make a dual/triple board design actually safer than a single board. However, if 2 separate lisa's are placed in a plane with wires in between, I hardly doubt it will ever be safer than a single lisa.
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