The open-loop transfer function of the unity-feedback control system is G(s)=5/(s(s+2)) . When input is the unit-step,the steady-state error is .
举一反三
- If the steady-state error of unity feedback control system to a ramp input is constant, then the system is a type system A: 0 B: I C: II D: III
- In the structural transfer block diagram of a control system, the unit placed in the feedback channel is: A: Measurement unit B: Regulating unit C: Control object D: Executing agency
- The transfer function G(s) of a system is [img=101x44]1803b532a91895e.png[/img]For the sinusoidal input r(t)=3sin2t, the steady-state output is equal to ( ). A: [img=166x47]1803b532b25dc7d.png[/img] B: [img=166x47]1803b532bee8afe.png[/img] C: [img=148x25]1803b532c710784.png[/img] D: [img=68x47]1803b532d264acf.png[/img]
- 1. In an open-loop control system, there is ( ). A: no feedback component B: no actuator C: no controller D: no amplification component
- The characteristic equation of positive feedback system is 1-G(s)H(s)=0 or, G(s)H(s)=1. Thus, the angle condition can be described as like this.[img=718x52]17869cad0e8ba2b.png[/img] A: 错 B: 对