Engineering DesignPurpose of the Lesson: To have students demonstrate the steps and processes involved in engineering design.

Warm-up – Copy and complete the following chart:

Items in this room that were designed by an engineer

Items in this room that were not designed by an engineer

1 1

2 2

3 3

4 4

5 5

Day 1 Drill

Engineering is:

• The systematic application of math, science, and technical principles

• Used to produce tangible end products that meet our needs and desires.

Exploration Activity

Students will complete the Harley Davidson: Birth of the V-Rod Work Sheet.

What is brainstorming?

• What do you think should be done during brainstorming?

• “I think during brainstorming you should…”

Exploration

Day 4 Drill

Day 2 Drill

• Government regulations often influence the design and operation of transportation systems.– Safety standards – Pollution standards

Day 3 Drill

Explanation

There is no perfect design • Different solutions may satisfactorily

solve a problem but no one solution is perfect.

• The best designs optimize the desired qualities – safety, reliability, economy, and efficiency – within the given constraints.

Explanation

What is brainstorming?• A group problem-solving process in

which each person in the group presents his or her ideas in an open forum.

• Ideas are to be recorded but not evaluated during this step.

• Drawings and lists are common ways to record design ideas.

• Modeling, testing, evaluating, and modifying are used to transform ideas into practical solutions.

Modeling

Modifying Evaluating

Testing

The cycle ends when the products satisfies all of the goals related to the criteria.

• Marketing a product involves informing the public about it as well as assisting in selling and distributing it.

Define the Problem• Look carefully at the

challenge’s objectives and design brief.

• Determine what your main objective should be.

• “How can I make _______ that will _________?”

• Brainstorm possible solutions.

• Generate ideas – sift through all of the ideas and further develop a few of them. – Sketch more than one view– Sketch in 3-D if you can– Label parts and sizes

Explanation

Identify Requirements• Requirements are made up of criteria and constraints. • Criteria are specific outcomes for a project. “What do you

want it to do?” and “How well do you want it to be done?” • Constraints are limits. These are based on the resources

available (tools and machines, materials, capital, people, information, energy, and time) and the environment in which the solution must exist.

Explanation

The Engineering Design Process

• Explore Possibilities – identify Pro’s and Con’s for each of the ideas you generated.– This should be based on the criteria and

constraints.– This analysis will be the basis for choosing your

final design….Be thorough and honest!

Explanation

Select an Approach

• Choose the solution that is the best for your team, the challenge objectives, the materials, and other constraints.

• Pick the best approach from all of the options.

• “We chose Idea C because…”

Explanation

Make a Model or Prototype

• Safely build your solution.

• Use the materials and tools available effectively and efficiently.

• Make sure to divide the work equally among team members.

Explanation

• Test and evaluate the model.– Assess it to verify that it meets

the requirements (checklist?).– Demonstrate functionality to

others and collect data (ex. Does it work every time? How often?)

• Refine the design.– Make adjustments based on the

results of evaluating.– Document the success of these

changes.

Show work and solve

• The helicopters are falling a distance of 16 feet.

• How fast in ft/sec are they going for the following times– 4 sec– 5 sec– 8 sec

Speed = Distance/Time

Optional Drill

12/15

• List 5 things you might change about the basic helicopter to make it fall slower– Ex. Wing length– – – – –

Optional Drill

Answer in a sentence or make a list• How should a “brainstorming” sheet look

different from a “generated idea” sheet?– Many more ideas– Rough sketches and list of ideas– Fewer notations or labels

Generated Ideas Drawn neatly and labeled. There should be more than one view or a 3D drawing. Pro/Con Chart

Optional Drill

12/19 Copy and give example

• Requirements are made up of criteria and constraints

• Name one criterion and one constraint for your helicopter.

Optional Drill

12/20 Answer in a complete sentence

• Describe how your final helicopter design is different from the original design given to you on the first day of the project.

Optional Drill

10/7 Answer in a sentence or make a list• How should a “brainstorming” sheet look

different from a “generated idea” sheet?– __________________________– __________________________– __________________________

Generated Ideas Drawn neatly and labeled. There should be more than one view or a 3D drawing. Pro/Con Chart