Which instability arises when a proportional valve's spool displacement significantly lags driver command in a hydraulic servo system?

💡 Explanation

System hunting arises because significant phase lag introduces negative feedback at resonant frequency, triggering system self-oscillation. Therefore, hunting ensues, rather than valve stiction (static friction), which causes steady offset errors and communication issues stem from signal integrity problems.

• Which consequence results when turbulent airflow disrupts the boundary layer during aircraft flight?
• Which premature engine issue results from turbocharger oil starvation?
• Which risk increases when cylinder head temperature rises excessively leading to piston expansion in an internal combustion engine?
• Which risk increases when a PID controller's derivative gain amplifies high-frequency noise in robotic arm?
• Which outcome results when an anomaly distorts sensor data used for path planning in autonomous underwater vehicles?
• Which risk is amplified when heat load exceeds design limits in an absorption refrigerator?