Which control system effect arises when a robotic arm's absolute encoder resets to "zero" during a mid-cycle high-speed movement?

💡 Explanation

Trajectory over-correction occurs because erroneous position data causes the feedback loop to react aggressively; the proportional-integral-derivative (PID) controller tries to compensate immediately. Therefore, instability rises; rather than smooth error correction, oscillations appear when the encoder provides drastically inaccurate input.

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