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← TechnologyWhich action corrects a hydraulic actuator oscillatory instability caused by insufficient dampening near a control valve?
A)Increase valve overlap dimensionally✓
B)Increase accumulator pre-charge pressure
C)Reduce hydraulic fluid viscosity index
D)Adjust pressure relief valve setting
💡 Explanation
Increasing valve overlap introduces deliberate deadband which invokes **hysteresis damping**. This eliminates the self exciting oscillations because kinetic energy is expended overcoming friction inside the valve, therefore stabilizes it to eliminate chatter, rather than increasing the accumulator volume.
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