I am interested in estimating joint impedance at the knee and would like to know how I can apply a series of perturbation on top of a velocity profile.
Biodex has addtional software called "research toolkit". I have not used it for a while but with the old software you could easily programme in different velocity profiles. We used to run the sofware from another labtop via the serial port (probably USB now). You will also need to check whether you need an additional interface board.