Thanks for your patient explanation Pavel. It really helps me.Now the loads can be included in the inverse dynamics and the results seems to be reasonable. Correspondingly, I think I have the last question about this topic.
How can I make the load to be time-dependent? For example, given a bvh file with 3000 frames, based on the real situation, I only want the load to be there during frame range of 900 - 2400 (totally 1500 frames) while not the whole 3000 frames, how can I achieve this? Did AnyForce3D support this function? (I checked the manual and it seems it didn't mention about this issue.) I really appreciate it if you can give me a simple example.
Great thanks for your patience, help, and guidance.
With Regards,
Tracy