Tag: INAV
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PID looptime: why it is not only about frequency
Last 18 months was an extremely good period of time for all mini-quad enthusiasts. Progress, hardware and software both, was just incredible. Who could have guessed that in less than 2 years mini-quads will evolve into main group of drones with such excellent flight characteristics. Just take a look at looptime. When I entered the…
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How to measure gyro noise frequency with Blackbox
Betaflight (and INAV) lowpass filter tuning can be a hard thing to do if you have not idea what is noise frequency you want to cancel. Sure, you can blind test or read tutorials. But what if I tell you, you can measure it quite precisely using only Blackbox logs? Or measure rotation speed of…
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How to tune PID I-term on a FPV drone
With this entry I want to initiate short series of articles showing how to tune multirotor / quadcopter PID controller. Let’s call it a continuation of Blackbox series, but this time I will not relay only on Blackbox data. Yes, I will show few examples how given scenarios looks on Blackbox logs, but all steps…
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Connecting ultrasonic rangefinder (Sonar) to INAV
Keeping constant altitude with a drone is not a trivial task. Specially, if drone is supposed to keep give altitude very precisely few meters above the ground. One of the reasons for it is difficulty of reading precise altitude. Barometer can drift when atmospheric pressure changes and can produce a lot of noise. GPS is…