Which risk dramatically increases when hydraulic actuator's piston seal fails in closed-loop system?

💡 Explanation

When piston seal fails in a closed-loop system, internal leakage causes unintended pressure deviations because feedback controller incorrectly compensates, driving system instablility and resulting uncontrolled oscillations. Therefore unstable oscillation becomes likely, rather over-heating or cavitation which demand higher leak rates or different mechanisms.

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