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From Thoughts to Reality
Terrence Mak
What is imagination?
What is modelling?The Cutty Sark
Greenwich, UK
Design in the Cave
Imagination and Modelling
• Abstract• Human-centric• Expressed in pictures,
movie, sound etc.• Imagination• No boundary and
unlimited• Not feasible
• Delicacy• Perspective• Mathematical• Logical• Spatio-temporal• From rough to detailed• Optimization– Searching for the best– Implementable
What the differences between Engineering and Physics
• Physics • Engineering
A Flow From Thinking to Prototyping
• See the board
Sketches
From Imagination to Drawing
Drawing -> Drawing (Advanced) -> Prototyping -> Optimizing
Prototyping
• You can have discovery– Seeing– Feeling– Hearing
• Go back to modelling and do prototyping again
• Engineering needs prototypes– Strengthen the models– And …?
Prototyping and Optimization
Still not working …
• Discrepancy between the thoughts and reality– Perspective– Scale– Timing
• Find out from – Modelling– Prototyping– Evaluation
• Then, do it again…(usually 100 times)
Try, and try again … until it works
A General Practice
• Thoughts• Models -> Thoughts• Prototypes -> Models• Evaluations -> Prototypes • Optimization -> Prototypes
This is engineering
• What have you learnt?
An Example
• A Flying Robot– Thoughts – like an airplane– Models – Forces, acceleration, …– Prototyping – Evaluation – Speed, stability, control …– Optimization – (objectives, constraints, variables)
Six degrees of freedom
The motion of an aeroplane has the six degrees of freedom of a rigid body, which described as:Translation:1. Moving up and down (heaving);2. Moving left and right (swaying);3. Moving forward and backward (surging);Rotation4. Tilting forward and backward (pitching);5. Turning left and right (yawing);6. Tilting side to side (rolling).
Prototyping
Evaluation
• Visualize the landscape
• Find out (sub)optimal solutions
• Define objective(s)• Subject to
constraint(s)• Define variables
Optimization
A case study
Using the Model-based Design
• Automatic real-time trading machine• Real-time EEG systems for car control• Human-computer interaction• Real-time system for air pollution
measurement