Lesson 7: Controlling Technology Systems

Lesson 7 Big IdeaControls are mechanisms or activities that use information to cause systems to change.

Purpose of Lesson: To identify characteristics of and model control systems.

2/2 Drill - copy

• Analytical Systems – systems that mathematically or scientifically make comparisons.

• Judgmental Systems – systems that use human opinions and values

Lesson 2: Controlling Technology Systems

Exploration – Define and apply understanding of Analytical and Judgmental systems to several examples.

• Analytical Systems – systems that mathematically or scientifically make comparisons.

• Judgmental Systems – systems that use human opinions and values

• Judgment may be base on intuition - human ability to sense or know immediately without reasoning

This would be analytical: I want to drink exactly 40 mL of milk

How do you know when to stop pouring?

Judgmental

You want enough to drink but you don’t want to over pour and make a mess.

Are there too many people on this boat? Are they over

the legal limit?

Analytical

Just count the people and compare to the legal limit.

Is this suitcase too heavy to take on the plane?

Analytical

Just weigh it and compare to the airline limit.

How long should I wait before I eat again?

Judgmental

You often eat when you feel you are hungry.

Is it a “keeper”?

Analytical

Fish must meet size or weight requirements. Just measure and compare.

Just like riding a bike• Steering a bicycle uses

our judgment. We turn left and right based on “intuition” and experience.

Input Process Output

Feedback

We want to make a right turn without falling over.

Input Process Output

Feedback

Lean and turn to the right

The bike turns right

Did we turn enough?Is the turn completed?

Adjusting “device”Turn and lean more/less?

2/3 Cruise control

Most cars now have this feature as standard equipment. It allows the driver to set the desired speed and not have to worry about going too fast or too slow. • Copy the chart and list the car part

Monitoring Device

Data-comparing Device

Adjusting Devices

Communication systems are made up of :• Source• Encoder• Transmitter• Receiver• Decoder• Destination

1/12 Copy and keep out

Lesson 2: Controlling Technology Systems

Explanation - The teacher will conduct an interactive lesson in which each of the following are discussed:

•Components of control systems•Monitoring devices and sensors•Data-comparing devices•Adjusting devices

•Manual versus automatic controls•Mechanical Technology Systems•Electrical Technology Systems•Electronic Technology Systems

2/3 Control Systems

•Control Systems are composed of 3 parts:•Monitoring Devices•Data-comparing Devices•Adjusting Devices

2/7 Copy

Communication systems are made up of :• Source• Encoder• Transmitter• Receiver• Decoder• Destination

9/15 Copy and give an example

Communication systems can operate• Human to Machine

•example• Machine to Human

•example

To the Wall and Back

• Position robot facing a wall about 5’ away

• Robot waits for your sound command

• Drive toward the wall until 18” away and stop.

• Robot shouts “Hurray!”

• Turn around and drive away from the wall until another sound command stops it.

9/15 Copy and give an example

Communication systems can operate• __________ to Human

•Example ___________________• _________ to Machine

•Example ___________________

Extension Activity – “It’s Under Control”

Controlling Technology Systems

ContextMany jobs are too dangerous, dull, or

dirty for humans to do. Technology systems have been developed to free humans from this kind of work yet still get the jobs done. Exploration on land, sea, and space is often done through the use of robots. With the use of sensors, a processor, and a program, robots can autonomously carry out a task.

Challenge:Adjust and program a Lego Mindstorm “Gobot Rover” to explore a cave and deploy a (simulated) remote air quality sensing device in the cavern with the highest ceiling.

Cave Specifications

Box Escape• Robot will be placed on the floor inside a

2’x2’ box with one side removed.

• Program must begin with a “I’m ready” sound from the robot.

• Movement will begin with a clapping sound.

• Robot must spin (slowly) until it detects the missing wall.

• It will then stop spinning and drive forward out of the box until it hears another “clap”

9/9 Drill - copy

• __________ Systems – systems that mathematically or scientifically make ______________.

• _______ ___Systems – systems that use ________ opinions and _______

Communication ______ are made up of :• Source• ____________• Transmitter• ____________• ____________• ____________

9/13

2/8 Drill – copy and complete

• Encoding -to put an idea or message into code or language

• Decoding - _____________

Convert (a coded message) into intelligible language

2/10 Drill – Copy and label each as Open or Closed-loop

• NXT drives toward wall and stops 12” away (ultrasonic)

• NXT spins until it hears a clap• NXT drives until it finds a

black line.

2/10 Drill – Copy and give examples

• A microprocessor is a computer processor on a microchip.

• It is programmable.• Has inputs and outputs

• Examples of each?

2/13 Bike Riding

Copy the chart and list the body part of the control system used to:

Turn Right on a Bike

Monitoring Device(s)

Data-comparing Device

Adjusting Devices

Just like riding a bike• Steering a bicycle uses

our judgment. We turn left and right based on “intuition” and experience.

Input Process Output

Feedback

We want to make a right turn without falling over.

Input Process Output

Feedback

Lean and turn to the right

The bike turns right

Did we turn enough?Is the turn completed?

Adjusting “device”Turn and lean more/less?

Notebook Check today

• Drills • Lesson 1 notes 9/1• Lesson 7 notes 9/20• Mechanical Machine Worksheet 9/8• Safety Rules 9/2• Understanding Control Systems article 9/9• Natural vs Man-made Systems Worksheet 9/1

9/20 Drill – Copy and give examples

• A ______________ is a computer processor on a _________.

• It is ______________.• Has _____ and ______

• Example 1 __________• Example 2 __________

1/17 Drill –Label as Open or Closed-loop

• NXT drives toward a wall and stops 12” away. (using ultrasonic sensor)• Open Closed

• NXT spins until it hears a clap.• Open Closed

• NXT drives until it finds a black line.• Open Closed

____ Drill – copy and complete

• _________ -to put an idea or __________ into _______ or language

• _________ - _____________

Convert (a coded message) into intelligible language

9/12 Control Systems

•________ ______are composed of 3 parts:•____________ Devices•_______-comparing Devices•_____________ Devices

9/14 Copy and give an example

_______________ systems can operate• ________ to Machine

•Example __________________

• ________ to Human•Example __________________