Discussion
Assertion (A): Two speed-controlled drives on one shaft should not both have speed loops.
Reason (R): Neither loop can win, so both saturate.
Select the correct option.
Answer: D
The shaft can only have one speed, so the loop with the slightly higher reference drives to its positive limit and the other to its negative. Making one a speed master and the other a torque follower resolves it, which is exactly what the reason implies is needed.
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