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<blockquote data-quote="Povl H. Pedersen" data-source="post: 22054" data-attributes="member: 4634"><p>IMU = Inertial Measurement Unit. Shows up/down and rate of turn. In principle a gyroscope.</p><p>Calibration on other quads is just handheld. Giving it an idea about direction/orientation. You can then finetune it by changing angle if you want it to always fly forward in neutral. But it does not need super precision.</p><p>For flying home, 10 degrees off by the IMU should not mean much, same with compass. Fly aways is a larger problem. 20 degrees off by the compass would likely cause it to fly smaller and smaller spirals around the taget. Not fly away.</p></blockquote><p></p>
[QUOTE="Povl H. Pedersen, post: 22054, member: 4634"] IMU = Inertial Measurement Unit. Shows up/down and rate of turn. In principle a gyroscope. Calibration on other quads is just handheld. Giving it an idea about direction/orientation. You can then finetune it by changing angle if you want it to always fly forward in neutral. But it does not need super precision. For flying home, 10 degrees off by the IMU should not mean much, same with compass. Fly aways is a larger problem. 20 degrees off by the compass would likely cause it to fly smaller and smaller spirals around the taget. Not fly away. [/QUOTE]
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