Kenneth Meier and Mariano
at Berkeley
Sean Bailey from Stanford
Goals
- Get some real data from experiments
- Establish a common framework for mechanical
properties measurements
1) 6DOF body trajectories (Mariano)
- Will provide us with 6DOF cockroach body trajectory and
corresponding foot contact information
- Stanford will construct phase plots of these trajectories with
lines of foot contact changes
- Stanford will analyze this information and look for correlatiosn
with Variable Struture Systems and Tomlin's stability envelopes
work
2) Tiny SDM manufacture
- Full's group has access to 3 measuring setups:
50g max force, 4mm disp.
100g max force, ?? disp.
500g max force, ?? disp. (being used)
- The size of the leg needs to be comparable to the size of the
actual cockroach leg for it work with their setup
- They also suggested that Stanford do some of own measurements
with simple geometries of the same material (a good suggestion -
does Stanford have the capability to do these kind of static and
dynamic measurements?)
3) Engineering mechanical components explained
- see http://cdr.stanford.edu/biomimetics/documents/comp1.pdf
4) Biologist's method of mechanical measurements
explained
- see http://cdr.stanford.edu/biomimetics/documents/biol1.pdf
5) Perturbation Experiments Data (Kenneth)
- Kenneth will send us data from the perturbation experiment
described in: http://cdr.stanford.edu/biomimetics/documents/pert1.jpg
- In parallel with Kenneth, Stanford will attempt to identify the
mechanical components that would yield such a perturbation
response
- Stanford will help Kenneth with more methodical techniques for
determining constituent mechanical components
6) Kenneth's Measurements explained
- Location of muscles for perturbation experiments
- see: http://cdr.stanford.edu/biomimetics/documents/ken1.pdf
7) Kenneth's Future Plans
- Develop segmental model per: http://cdr.stanford.edu/biomimetics/documents/model1.jpg
- Suggested he contact Dr. Heegaard at Stanford about his
Mathematica SMASH dynamics package
(heegaard@Bonechip.stanford.edu)
- Basic question - how do we characterize how well a leg
rejects disturbances?
8) Whole leg stiffness and damping (Mariano
and Anne)
- Took movie of dead cockroach
- Use movie capture data to get whole leg stiffness and damping