单项选择题
A.instigating corrective action B.indicating values of controlled variables C.warning of off-limit conditions D.providing record of performance
A feedback is an input（）A.which governs the state of a ...
单项选择题A feedback is an input（）
A.which governs the state of a variable B.which provides a visual and audible alarm C.which indicates values of controlled variables D.which measures the state of the controlled variable
The closed-loop system differs from the open-loop syste...
单项选择题The closed-loop system differs from the open-loop system by（）
A.the lack of a feedback B.the presence of a feed back C.the lack of a computer D.the presence of a computer
From the passage, we can learn that the simplest contro...
单项选择题From the passage, we can learn that the simplest controller action is（）
A.two-step controller action B.proportional, controller action C.integral controller action D.derivative controller action
