(a) Define the following terms:
• Sensor
• Transducer
• Actuator
• Controller
• Control system
• Operating bandwidth of a control system
• Control bandwidth
• Nyquist frequency
(b) Choose three practical dynamic systems each of which has at least one sensor, one actuator, and a feedback controller.
(i) Briefly describe the purpose and operation of each dynamic system.
(ii) For each system, give a suitable value for the operating bandwidth, control bandwidth, operating frequency range of the sensor, and sampling rate for the sensor signal for feedback control. Clearly justify the values that you have given.