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← TechnologyWhich failure occurs in a robotic arm when its encoder pulses are sporadically dropped?
A)Deterioration of joint compound material
B)Unstable proportional-derivative control effort
C)Accumulated positional calculation errors✓
D)Resonance exceeding joint motor limits
💡 Explanation
Position errors accumulate over time due to *dead reckoning*, because the control loop relies on encoder feedback to determine the arm's position; therefore, the position is increasingly wrong, rather than producing an instantaneous instability or motor resonance unless persistent.
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