instability of the muscle activation when using CMC with external loads on elbow movement
Posted: Thu Aug 27, 2020 12:24 am
Hello,
i have a problem with the output of the muscle activation when using CMC. Here i simulated the elbow movement of flexion with and without exoskeleton with CMC. The external loads are just the actuator torque from the exoskeleton on elbow for flexion movement (applied on ulna and express in ground). The muscle activation of the model with external loads is not stable as you can see on the picture below (with EXO - the red line and marked with black circle)
The setting for the external loads is below:
the external loads' values of torque in x and y axis are all 0, but the torques in z axis are not 0
Here is the sample of the external loads:
The simulated model with exo:
i don't know why it has insability in the earlier time frame. The muscle activation of the model with exoskeleton should be smaller than without exoskeleton, but it spiked and instable on earlier time frame. Can someone help me or give me insight?
Thanks
Wahyu
i have a problem with the output of the muscle activation when using CMC. Here i simulated the elbow movement of flexion with and without exoskeleton with CMC. The external loads are just the actuator torque from the exoskeleton on elbow for flexion movement (applied on ulna and express in ground). The muscle activation of the model with external loads is not stable as you can see on the picture below (with EXO - the red line and marked with black circle)
- muscle activation 1.png (194.64 KiB) Viewed 578 times
- external loads.png (68.2 KiB) Viewed 578 times
Here is the sample of the external loads:
- external loads values.png (42.46 KiB) Viewed 578 times
- model.png (106.17 KiB) Viewed 578 times
Thanks
Wahyu