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Topic: Some questions about Complementary Filter (Read 445 times) previous topic - next topic

numkang

Hello, I would like to ask you some questions about Complementary Filter
First, I got this code
Code: [Select]
angle = alpha *(angle+gyro*dt) + (1-alpha)*acc
and "alpha" is 0.98 which is come from
Code: [Select]
alpha = T/(T+dt)
and "T" is time constant, so if alpha = 0.98 I'll get T = 0.49 sec

1. I want to know which parameter came first alpha or T ?
(we have to define alpha (0.98) then calculate T (0.49) ,or define T then calculate alpha)

2. How to define "alpha" or "time constant"?

3. Must all units of "angle", "gyro", and "acc" be DEGREE (not Radian) ?

4. What maximum and minimum values of "angle", "gyro", and "acc" should be for plotting graph?

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