Frequently Asked Questions

Software - Answers

What analysis tools are available in Simi Motion?
The tools available are 3D Kinematics (displacements, velocity, acceleration, angles, angular velocity, and angular acceleration), Inverse Kinematics (joint center, rotation angle) and Inverse Dynamics (moment, force, power). Calculation of the center of gravity is a feature as well as many more.

In what format can Simi Motion export data?
C3D, ASCII, TXT, BVH, BVA, 3ds max, Lightwave, Maya, Poser.

The ability to calculate joint angles using Euler or Cardan angles would also be desirable.
The module 'Inverse Dynamics' is able to calculate cardan angles. The calculation of euler angles is being developed.

Do you also have analysis software to identify onset and termination of movements?
Yes, you may use the phaser module for defining the onset and the terminations of movements.

How many channels does the system support?
The system supports 128 (for force plate, EMG, goniometric, etc)

Can video capture be automatically synchronized to additional measurements like analog data input from force plates? How is the information synchronized and what sort of hardware is required to perform this operation?
You can acquire analog data from force plates, EMG, goniometers etc. synchronized with the same computer. Kistler and AMTI force plates have special support (calculation of moments, center of pressure, etc.).

What algorithm do you use for calculating 3D data from your video?
DLT (digital linear transformation), which is a linear transformation of 2D camera data into a 3D space. In addition we use DLT OPT which enhances the accuracy of the system. Also included, is a calibration check to verify the accuracy of calibration.

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