Which of the following control actions, when combined with proportional-position action, will eliminate manual repositioning of the set point for each load change to produce an automatic reset action?
• Proportional control versus automatic reset (integral) action in control systems • How a controller responds to steady-state offset after a load change • Difference between neutral band, floating, reciprocal, and rate (derivative) actions
• When a load changes and you only have proportional-position control, what happens to the error between the process variable and the set point over time? Does it go to zero by itself? • Which type of control action is specifically designed to remove a persistent offset by slowly shifting the controller output until the error is driven to zero? • Among the listed actions, which one behaves like a continual "automatic adjustment" of the set point or output, rather than just reacting to how fast the error is changing?
• Identify which option is associated with reset or integral behavior in control systems terminology. • Eliminate any options that mainly deal with rate-of-change (derivative) rather than eliminating steady-state error. • Check which term is used in textbooks to describe the controller action that removes the need for manual repositioning after each load change.
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