Hi everyone,
i’m trying to model a five-point double-toggle lever with bearings with load-dependent friction, based on the normal-force (Coulomb, which is constant at any velocity).
I’ve tried modeling the bearing with the Multibody Interface and Rotational Friction, but i can only add a constant friction torque. When i calculate the torque using the measured normal force of the bearing, I get an algebraic loop. Is it possible to apply a load dependent Torque (Tr = Fr*d/2 = Fn*µ*d/2) and a friction force (Fr = µ*Fn) without creating algebraic loops?
Note on the image below: The force Rij is calculated as R = µ*N and acts opposite to the velocity. If R is transformed to the center, this results in atorque (T = r*R), acting opposite to the velocity.

Best greetings!Hi everyone,
i’m trying to model a five-point double-toggle lever with bearings with load-dependent friction, based on the normal-force (Coulomb, which is constant at any velocity).
I’ve tried modeling the bearing with the Multibody Interface and Rotational Friction, but i can only add a constant friction torque. When i calculate the torque using the measured normal force of the bearing, I get an algebraic loop. Is it possible to apply a load dependent Torque (Tr = Fr*d/2 = Fn*µ*d/2) and a friction force (Fr = µ*Fn) without creating algebraic loops?
Note on the image below: The force Rij is calculated as R = µ*N and acts opposite to the velocity. If R is transformed to the center, this results in atorque (T = r*R), acting opposite to the velocity.

Best greetings! Hi everyone,
i’m trying to model a five-point double-toggle lever with bearings with load-dependent friction, based on the normal-force (Coulomb, which is constant at any velocity).
I’ve tried modeling the bearing with the Multibody Interface and Rotational Friction, but i can only add a constant friction torque. When i calculate the torque using the measured normal force of the bearing, I get an algebraic loop. Is it possible to apply a load dependent Torque (Tr = Fr*d/2 = Fn*µ*d/2) and a friction force (Fr = µ*Fn) without creating algebraic loops?
Note on the image below: The force Rij is calculated as R = µ*N and acts opposite to the velocity. If R is transformed to the center, this results in atorque (T = r*R), acting opposite to the velocity.

Best greetings! simulink, friction, bearing, simscape, loop MATLAB Answers — New Questions

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