ME457: Mechatronic System Modeling and Simulation

1. ME457: Mechatronic System Modeling and Simulation Prof. R. C. Rosenberg Your objective: domination! My objective: to help you to dominate!

2. Math-based Engineering Math-based engineering (MBE) is becoming increasingly important in industry. What are the drivers for this trend?

3. Some key questions • Why is math-based modeling important to industry? • What does “math-based modeling” mean? • What does “simulation” mean? • What are “mechatronic systems”?

4. Why is math-based modeling important to industry? • Increased complexity of components and systems • Need for higher reliability means need for more testing • Need for faster design of new products • Better integration can be achieved between design and manufacturing planning

5. What does “math-based modeling” mean? • Precise description of components and their interconnections (preferably in a form that is computable) • Schematics and idealized elements • Mathematical graphs • Equations • Tables of performance data • Computer programs

6. What does “simulation” mean in a mbe environment? Exercising a math model by computing its behavior (not necessarily its formal solution) • Software is involved (e.g., MATLAB). • Models are constrained by software characteristics. • Software predictions are constrained by implementation of algorithms and by their application. • Validation is still required at some level.

7. What are “mechatronic systems”? • Mechatronics: combination of mechanical and electronic subsystems (Japan, late 1960s) • Has evolved to mean inclusion of intelligence to get “smart” products • Major components to be integrated: • Mechanical stuff (solids and fluids) • Electrical/electronic stuff (circuits, sensors and actuators) • Control stuff (feedback action) • Computer stuff (intelligent decision-making)

8. What are “mechatronic systems”? (cont.) • Systems involve structural ideas: • Inputs and outputs • Connections among model components • Hierarchical arrangement (subassemblies) • Various internal models possible as long as I/O description is maintained

9. Mechatronics modeling Energy is a guiding principle for getting physics into mathematical form. • Energyhas various forms • Time-rate of energy transfer is power • Signals denote transfer at very low energy levels (called information transfer) • Individual components have ports for interacting (power and/or signal types) • Components are connected between pairs of ports by power bonds or signals • Transducer devices convert between energy forms

10. Mechatronics modeling (cont.) Some energytypes commonly used in engineering: • Mechanical energy in translation and rotation • Electrical and magnetic energy in circuits • Fluid power in hydraulics and acoustics • Thermal energy and heat transfer • Chemical energy in reactions

11. Mechatronics modeling (cont.) Some transducers commonly used in engineering: • Mechanical energy translation/rotation: rack and pinion • Electrical/mechanical rotation: dc motor • Fluid power/mechanical translation: hydraulic ram • Electrical/thermal energy: resistance heater • Chemical energy/thermal: a match