Hi, I am having trouble understanding how to draw a phase graph for a bode plot. I have worked out the gain but for some reason the phase one is giving me grief.
The question i am working on is
100/(s+15)(s+27)(s+38) I know that the corner frequencies are 15, 27, 38. I have drawn the cross over freq over 2 decades from 0 to -90deg. My phase plot started on the 0deg line and traveled until i came to the first cross over freq and this is where i got stuck because i am not sure how much angle i need to travel before the next cross over freq.
Can you add the cross over freq together to find the angle?
The attachment is my attempt so far
Any help would be great.
The question i am working on is
100/(s+15)(s+27)(s+38) I know that the corner frequencies are 15, 27, 38. I have drawn the cross over freq over 2 decades from 0 to -90deg. My phase plot started on the 0deg line and traveled until i came to the first cross over freq and this is where i got stuck because i am not sure how much angle i need to travel before the next cross over freq.
Can you add the cross over freq together to find the angle?
The attachment is my attempt so far
Any help would be great.
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