Control action to make the controlled variable follow changes in the set point i

Question

Control action to make the controlled variable follow changes in the set point is called: Regulatory control Servo mechanics Load suppression Feed backward controlling One of the following is not an objective of control systems: Allow operation at lighter pressures or temperatures Decrease energy consumption Decrease off-specification products Increase safety In control terms, deviation variable is the difference between: the final value of the set point and the final value of the controlled variable the final value of the controlled variable and the final value of the manipulated variable the value of the variable at any time, and the initial value of the variable none of the above. A system, with a transfer function G(s), is subjected to a ramp change in is input of value at. The output new steady would be: In a Cascade control systems: the primary loop must be faster than the secondary loop the secondary loop must be faster the primary loop the primary and secondary loops must have similar dynamics it dose not matter which loop is faster than the other Smith predictor is used to: eliminate the offset enhance the performance of feed forward controller overcome the problem of large process time delays when several manipulated variables control one control variable The Laplace transform of the function depicted in the figure is

Explanation / Answer

d) SERVOMECHANISM

e) ALLOW OPERATION AT HIGHER PRESSURES OR TEMPERATURES: this is just an action, not an objective

f) OPTION i: to minimize the error

h) THE SECUNDARY LOOP MUST BE FASTER THAN THE PRIMARY LOOP

i) OPTION ii

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