In any governor there is a small range of speed in which no corrective action occurs. This speed range is called the governor deadband and is caused by __________.
• Governor deadband as the range of speed where governor output does not change • The effect of mechanical friction vs. intentional design features like speed droop • How small motions in the linkage/control valve may be resisted or delayed
• Ask yourself: What would physically prevent the governor mechanism from responding to very small speed changes? • Which option describes something that would oppose or "soak up" small motions, rather than something that makes the system more responsive? • Is deadband usually caused by intentional design to change steady-state speed, or by something that must be overcome before motion starts?
• Compare friction (stiction, linkage resistance) with designed characteristics like droop or sensitivity— which one creates a non-responsive range? • Think about a control valve that is slightly stuck: would tiny speed changes move it right away, or only after force builds up? • Verify which factor would create a no-action zone rather than just changing the final governed speed.
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