Flashcards
Ch 7: Steady-State Error
Cards in this deck (11)
- 1Increasing system gain has what effect upon the steady-state error?decreases error
- 2For a step input, the steady-state error is approximately the reciprocal of the static error constant if what condition holds true?static error coefficient is much greater than unity
- 3What is the relationship between the static error constants and the steady-state errors for ramp and parabolic inputs?They are reciprocals.
- 4For a step input disturbance at the input to a plant, describe the effect of controller and plant gain if each transfer function has no pure integrations on the effect of the disturbance.Disturbance is minimized by decreasing the plant gain and increasing the controller gain.
- 5Define, in words, sensitivity.the fractional change in a function caused by a fractional change in a parameter
- 6What are two sources of steady-state error?nonlinear, system configuration
- 7Define system type.the number of pure integrations in the forward path
- 8What effect does feedback have on disturbances?minimizes their effect
- 9Is the forward-path actuating signal the system error if the system has nonunity feedback?no
- 10How are nonunity feedback systems analyzed and designed for steady-state errors?A unity feedback is created by subtracting one from H(s). G(s) with H(s)-1 as feedback form an equivalent forward path transfer function with unity feedback.
- 11What are two methods for calculating the steady-state error for systems represented in state space?final value theorem and input substitution methods
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- Undergraduate Controls Flashcards on Ch 7: Steady-State Error, created by David Smith on 11/11/2015.
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- David Smith
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