Question

1. a. Compare the systems listed in the table and determine if they are closed-loop or open-loop

control systems. Briefly explain your answers in the space provided. (3 Marks)

Systems	Open/Closed Loop	Explain Your Answer
Light switch to turn on the light
Thermostat to keep a constant temperature
Volume on a radio

Consider any one of the Open Loop systems from the above and describe how you might make it a Closed Loop system. (2 Marks)

1. b In a closed-loop control system, fill in the controller, plant, and a sensor for the process shown below.

Air Conditioner: (3 Marks)

Mention any two external conditions that could affect the system. (1 Mark)

List any two smart products available to control indoor temperature.(1 Mark)

Answer 1

1.al systems open closed loop Open loop Light switch to turn on the light Explain your Ang was light bulf Camb Switched onor off irrespective by ball temperature or othes External pajameters Closed loop Thermestate to keep Constant temperature Thermestat cheeks the temperature by Quior Constantly and depending on the it Adjusts the temperature Valume on Open loop a radio Radio Valume can be adjusted irrespective by range of output valume

- light bulb Can be made closed loop system by introducing the light sensor in feedback patk. Reruired Cight light Actual light ON/OFF Switch Bulb Room light Sensor a Now the above system become the closed loop. Hese bulb can be on are off based on light the Room. in side Lib) Revured Tempelatwe Current Temperature output Error Control 1. Controlles 2. plant + messured output 3. Sensor * Two External Conditions that aggect the System : ů Noise in sensors ii) Error in reading Output Valuy. * Two Smalt products available to control indoor Temperature i i Smart space heates Gi) Smart Air Conditiones