Non smooth plot, undesired points in chart.
Hello collegues,
I have a modell in motionview, and I locate an output of the torque applied in a rotational motion. The motion follows the next expression:
`STEP5(TIME,0,0,0.5,(185*3*(2*PI/40)))+STEP5(TIME,0.5,0,1,(-185*3*(2*PI/40)))+STEP5(TIME,1,0,1.5,(185*3*(2*PI/40)))+STEP5(TIME,1.5,0,2,(-185*3*(2*PI/40)))+STEP5(TIME,2,0,2.5,(185*3*(2*PI/40)))+STEP5(TIME,2.5,0,2.75,(-185*3*(2*PI/80)))`
When I plot the results of the torque, I obtain the attached chart, very irregular.
Do you know the root cause, and if it's possible to solve this undesirable result?
Thanks!
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Altair EmployeeSort by:
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Hi Carlos,
A Motion is a constraint that you apply to a certain Joint, so the applied/plotted torque is the amount of torque required to force the system to complete the prescribed Motion.
Those spikes usually point to integrator error settings being too coarse (allowing too much error), your output step size being too small (not plotting enough data), or the Motion has to overcome imperfect kinematics to assert the desired movement on the Joint.
Hope this helps!
Adam Reid