Feb 19, 2014: Below is a chart of the Speed Factor
comparison between msmac
, our currently distributed 2D smac program with our soon to be released msmac3D
- We used the inputs for msmac validation runs from our RICSAC97 paper
- For msmac3D we first ran it in '2D' mode to insure the results are the same as the 'gold standard' msmac 2D program results
- We then ran msmac3D in 3D mode to quantify the increase in execution time to simulate the vehicle responses in 3D.
- To run and msmac3D Simulation in 3D only requires 3 additional inputs for each simulated vehicle: CG height, Bumper height and Overall height.
- The program automatically approximates all the required 3D simulation inputs for the vehicles.
- Any and all 3D simulation inputs (suspension properties, tire properties, etc) can be user input to provide an override of the defaults
For the speed test we calculated a Speed Factor
- Factor is calculated by dividing the Simulation Time by the time required to execute a simulation (calculation time).
So for example, a 5 second collision simulation run:
From the chart you'll notice the following:
- if it takes 5 second actual time to run msmac or msmac3D the Factor would be 5/5 = 1 which represents REAL TIME
- if it takes 1 second actual time to run msmac or msmac3D the Factor would be 5/1 = 5 which represents 5 times faster than REAL TIME
- if it takes 0.25 second actual time to run msmac or msmac3D the Factor would be 5/0.25 = 20 which represents 20 times faster than REAL TIME
- Note that the range for the McHenry programs msmac and msmac3D are between 0.50 and 34.6!
- All tests include a collision simulation.
- the first 12 simulations are the RICSAC full-scale tests numbers 1 through 12, run 13 is a simulation of a NYSTARS full scale crash test
- We'll add more tests soon
- msmac as distributed runs at greater than 5.0 to 30.0 times real time which means a 5 sec collision simulation takes less than 1 sec.
- msmac3D running in 2D mode runs at comparably fast calculation times and with the same results as msmac
- msmac3D in 3D mode, which includes the concurrent running of 2 mHVOSM 3D simulations for the colliding vehicles, currently runs at a factor of approximately 0.50 or 50% of real time, meaning a 5 second collision simulation takes approximately 10 seconds
In the next few weeks we will be working on making the execution speed of msmac3D
faster through a 'tune up' us using optimizations and tuning tools so that we will get our msmac3D
3D collision simulation program running at real time or better.
- Our Current McHenry Software licensees are used to fast executions times for our 2D msmac program
- Speed will also help in our implementation of the automatic iteration of msmac3D which is to be an extension of our SMACITER program (both of these programs we also expect to release in the next 30 to 60 days)
This benchmark is our "starting point".
Our simulation programs run faster than any other 3D simulation program in the reconstruction community
We also are insuring that ALL our program results are accurate and valid and will not change with optimization