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← TechnologyWhich adverse effect accompanies high-frequency switching in pulse-width modulation valves of servo-hydraulic systems?
A)Increased stiction due to lubricant breakdown
B)Elevated hysteresis from component fatigue
C)Amplified acoustic noise from fluid pulsations✓
D)Diminished bulk modulus from aeration
💡 Explanation
When PWM valves switch rapidly, the sudden pressure changes induce fluid pulsations because compressibility effects are amplified at high frequencies, resulting in acoustic noise. Therefore, noise is produced instead of stiction, hysteresis, or reduced bulk modulus which result from different degradation pathways.
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