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Rotational Hard Stop

Purpose

Ideal rotational hard stop

Library

Mechanical / Rotational / Components

Description

pict

The Rotational Hard Stop models an ideal one- or two-sided hard stop in a rotational system, which restricts the relative displacement of the two flanges between an upper and lower limit. While the displacement is within the limits, no torque is transmitted. When the displacement hits either limit, the displacement is clamped at the limit and the flanges become rigidly connected until the transmitted torque reverses.

The figure below shows the displacement/torque characteristic and the state chart of the component.

pict

Parameters

Upper limit
The maximum displacement θmax   between the flanges. Set to inf to disable this limit.
Lower limit
The minimum displacement θmin   between the flanges. Set to -inf to disable this limit.
Initial displacement
The initial displacement of the flanges, in radians. May be specified in order to provide proper initial conditions if absolute angles are measured anywhere in the system. Otherwise, this parameter can be left blank.

Probe Signals

Torque
The transmitted torque τ   flowing from the unmarked to the marked flange, in Newton meters (Nm).
Displacement
The displacement θ   of the marked flange with respect to the unmarked flange, in radians.
State
The internal state of the component: -1 in lower limit, 0 inside limits, +1 in upper limit.