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Which risk increases when excessive 'jitter' affects the encoder feedback within robotic arm's closed-loop control?

A)Positional instability increases
B)Thermal runaway stabilizes
C)Bearing life extends greatly
D)Static friction decreases linearly

💡 Explanation

Excessive jitter in encoder feedback disrupts the PID control loop due to inaccurate positional data. The mechanism is signal aliasing because the controller incorrectly interprets the position, therefore leading to positional instability, rather than stable operation due to continuous erroneous correction.

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