PAE: Parts of a Control System

A refrigerator keeps a steady, cool temperature in order to keep food at a temperature which keeps it from spoiling. Jackson sets the temperature by adjusting the thermostat inside the refrigerator. The fridge assesses the temperature in the fridge with a sensor and a compressor circulates the refrigerant throughout the system.

Identify the input, output, process, and control.

a

b

c

d

cool air flow

compressor

desired temperature

thermostat set by person

A refrigerator keeps a steady, cool temperature in order to keep food at a temperature which keeps it from spoiling. Jackson sets the temperature by adjusting the thermostat inside the refrigerator. The fridge assesses the temperature in the fridge with a sensor and a compressor circulates the refrigerant throughout the system.

This represents ​ (a)   system

• a closed-loop
• an open-loop

A refrigerator keeps a steady, cool temperature in order to keep food at a temperature which keeps it from spoiling. Jackson sets the temperature by adjusting the thermostat inside the refrigerator. The fridge assesses the temperature in the fridge with a sensor and a compressor circulates the refrigerant throughout the system.

Identify the mechanical & electrical components.

Groups:

(a) Electrical Components

,

(b) Mechanical Components

• thermostat

• power supply

• fan

• compressor

A soda dispenser allows Roxie to fill a cup with her desired soda. She places her cup under the dispenser, then uses the cup to push the lever. The soda then flows from the dispenser until the lever is released.

Identify the input, output, process, and control.

• process

• The dispenser dispensing soda into the cup

• input

• Person pressing lever

• output

• Soda level in the cup

• control

• How much soda the person wants in the cup

A soda dispenser allows Roxie to fill a cup with her desired soda. She places her cup under the dispenser, then uses the cup to push the lever. The soda then flows from the dispenser until the lever is released.

This represents​ (a)   system.

• an open-loop
• a closed-loop

A soda dispenser allows Roxie to fill a cup with her desired soda. She places her cup under the dispenser, then uses the cup to push the lever. The soda then flows from the dispenser until the lever is released.

Identify the electrical and mechanical components of this system.

Groups:

(a) Electrical Components

,

(b) Mechanical Components

• how the soda is dispensed

• soda dispenser receiving power

After washing clothes, DeShaun needs to dry them in his dryer. He places them in the dryer and adjusts the knob to “permanent press”. The heating elements in the dryer create and dispense warm air as the clothes spin. The moisture sensor in the dryer ends the drying cycle once the clothes are dry.

Identify the input, output, process, and control.

a

b

c

d

the dryer setting chosen

heating elements

desired dryness

actual dryness of clothes

After washing clothes, DeShaun needs to dry them in his dryer. He places them in the dryer and adjusts the knob to “permanent press”. The heating elements in the dryer create and dispense warm air as the clothes spin. The moisture sensor in the dryer ends the drying cycle once the clothes are dry.

What type of system is this?

• closed-loop system

• open-loop system

After washing clothes, DeShaun needs to dry them in his dryer. He places them in the dryer and adjusts the knob to “permanent press”. The heating elements in the dryer create and dispense warm air as the clothes spin. The moisture sensor in the dryer ends the drying cycle once the clothes are dry.

Identify the mechanical & electrical components of this system.

Groups:

(a) Electrical Components

,

(b) Mechanical Componenets

• how the dryer spins

• how the dryer produces heat

• how the dryer is powered