MATLAB Answers

Hank Hsu
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Simscape Change Actuation Method in Realtime?

Asked by Hank Hsu
on 20 May 2018
Latest activity Answered by Steve Miller on 3 Apr 2019
Hello everybody, I'm building a model to simulate a robot's gait. The robot can actuate a joint by torque initially, and then actuate by a track, after a specific time. I wonder if there's a way to simulate this in Simulink. I tried if-else blocks with revolution joints which have different actuation type, but it raises error "Connections of the Physical Network cross nonvirtual boundaries." Rather, let's do this way: build a pendulum, give it sinusoidal motion actuation in time 0 to 3, and a constant torque in time 3 to 10.

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1 Answer

Answer by Steve Miller on 3 Apr 2019

Hi Hank,
Clever idea. However, you cannot switch actuation method (torque actuation / motion actuation) using if-else subsystems in Simscape. That changes the analysis type.
I think you would need to have a control strategy that changes its reference signal based on trajectory phase, but only relies on torque actuation.
--Steve

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