1、 问题:A open-loop control system utilizes an actuating device to control a process ( ).
A:without using feedback
C:in engineering design
D:in engineering synthesis
答案: 【without using feedback】
2、 问题:Important modern applications of control systems include which of the following? ( )
答案: 【Safe automobiles;
3、 问题:The following systems belong to the open-loop control are ( ).
B:water-level automatic control system
C:traffic control by means of signal operated on a time basis
D:Watt’s flyball governor
答案: 【washing machine;
traffic control by means of signal operated on a time basis】
4、 问题:The basic requirements for automatic control systems include ( ).
5、 问题:Closed-loop control systems should have which of the following properties: ( )
A:Good regulation against disturbances
B:Desirable responses to commands
C:Low sensitivity to changes in the plant parameters
答案: 【Good regulation against disturbances;
Desirable responses to commands;
Low sensitivity to changes in the plant parameters;
6、 问题:A system is called linear if the principle of superposition applies.
7、 问题:In the presence of disturbances, open-loop and closed-loop control system will perform the desired task.
8、 问题:A closed-loop control system uses a measurement of the output and feedback of the the signal to compare it with the reference input.