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Which outcome immediately follows the failure of a PID controller's derivative term in industrial robotic arm positioning system?

A)Increased settling time with oscillations
B)Sudden motor overcurrent and shutdown
C)Complete loss of position feedback
D)Decreased steady-state error due to less input

💡 Explanation

When the derivative term fails, the PID controller loses its ability to predict and dampen oscillations because the damping action lessens, leading to overshoot and prolonged settling time. Therefore, increased settling time results, rather than shutdown, feedback loss or lowered input, each requiring distinct failure conditions.

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