The following are not the basic elements of control ( )
A: Control subject
B: Given conditions and objectives
C: Controlled object
D: Control system
A: Control subject
B: Given conditions and objectives
C: Controlled object
D: Control system
举一反三
- Closed-loop control system is an automatic control system. Open-loop control system is not an automatic control system.
- Which of the following descriptions is wrong about the control of an air conditioner?_____ A: The control position can be divided into remote control and local control. B: In local control, the automatic control system also needs to work. C: If the remote control doesn't work, the air conditioner won't work. D: In case of control system failure, manual control mode can be adopted.
- Which of the following is NOT thought to be the power of the national government in the federal government system? A: control of federal money B: control of interstate commerce C: control of national defense D: control of state criminal and civil laws
- Remote control means that the system is being controlled by the operator who is situated （） from the system.
- According to the characteristics of the control system, CNC machine tools can be divided into ( ),( ) and contour control machine tools. A: Point to Point Control B: open-loop control C: line motion control D: closed-loop control