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block_diagrams_b

# block_diagrams_b - BLOCK DIAGRAMS BOND GRAPHS AND CAUSALITY...

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BLOCK DIAGRAMS, BOND GRAPHS AND CAUSALITY The main purpose of modeling is to develop insight. “Drawing a picture” of a model promotes insight. Why not stick with the familiar block diagrams? Block diagrams provide a picture of equations; —they portray operators acting on signals . Bond graphs are related to model equations, —but there may be many different choices of equations to represent a given model; —there may be many different block diagrams corresponding to one bond graph. Mod. Sim. Dyn. Sys. Block diagrams & bond graphs page 1

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m k b R C L
F k p m Σ x k F b F m v k v m v b F k p m Σ x k F b F m v k v m v b m k b R L C F k p m Σ x k F b F m v k v m v b

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F k p m Σ x k F b F m v k v m v b 1 / m d t k b d t F k p m Σ x k F b F m v k v m v b m k b R L C 1 / b d / d t m d t k F k p m Σ x k F b F m v k v m v b b d / d t m d / d t 1 / k
F k p m Σ x k F b F m v k v m v b F k p m Σ x k F b F m v k v m v b F k p m Σ x k F b F m v k v m v b m k b R C 1 / m d t k b d t 1 / b d / d t m d t k b d / d t m d / d t 1 / k L

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C I 1 R C I 1 R C I 1 R m k b R C L
C I 1 R C 1 I m k b R C C 1 I R R L

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block_diagrams_b - BLOCK DIAGRAMS BOND GRAPHS AND CAUSALITY...

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