Which risk increases when a hydraulic proportional valve's dither frequency overlaps a major system resonance?

💡 Explanation

When the dither frequency overlaps a system resonance, it excites the resonant mode because the valve's rapid opening and closing amplifies vibrations in the hydraulic circuit, leading to actuator instability. Therefore, actuator instability increases, rather than seizure, cavitation, or overheating, which require distinct failure conditions involving wear, pressure, or friction.

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