
1 Introduction to SimMecha nic s ™ Softwar e
Modeling with SimMechanics First and Second Generations
SimMechanics software contains two technologies: First Generation and
Second Generation. First-generation technology includes the block library
and visualization utility found in SimMechanics releases prior to R2012a.
Second-generation technology introduces a simpler modeling paradigm
with a new block library, a powerful computational engine, an advanced
visualizat ion utility based on OpenGL computer gra p hi c s, and tighter
integration with Simscape products.
SimMechanics first- and second-generation technologies have diffe rent sets
of capabilities. Which technology to use d epends on the effects y ou need to
model. Use first-generation technol og y for models requiring variable gravity,
certain complex constraints, or to measure reaction or constraint forces. In
nearly all other cases, use second-generation technology.
The table provides a detailed comparison between first- and s econd-generation
technologies.
Feature
SimMechan ics First
Generation
SimMechan ics
Second G eneration
Mass/Inertia
Calculation
Manual only
Automatic or m anual
Solid Geometry
No Yes
Animation Replay
No Yes
3-D M
odel Exploration
Limi
ted
Yes
Init
ial State Targets
Limited
Yes
Sim
scape Logging
No Yes
Co
de Generation
Yes Yes
CA
DImport
Yes Yes
2
M
otion Actuation
Yes Yes
F
orce/Torque Sensing
Yes Yes
3
Complex Constraints
1
Yes
Gears only
Variable Mass/Gr av ity
Yes No
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