WOLFRAM SYSTEMMODELER
Flange_b1dim. rotational flange of a shaft (nonfilled square icon) 
SystemModel["Modelica.Mechanics.Rotational.Interfaces.Flange_b"]
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This is a connector for 1dim. rotational mechanical systems and models the mechanical flange of a shaft. The following variables are defined in this connector:
phi  Absolute rotation angle of the shaft flange in [rad] 
tau  Cuttorque in the shaft flange in [Nm] 
There is a second connector for flanges: Flange_a. The connectors Flange_a and Flange_b are completely identical. There is only a difference in the icons, in order to easier identify a flange variable in a diagram. For a discussion on the actual direction of the cuttorque tau and of the rotation angle, see section Sign Conventions in the user's guide of Rotational.
If needed, the absolute angular velocity w and the absolute angular acceleration a of the flange can be determined by differentiation of the flange angle phi:
w = der(phi); a = der(w)
Synchronous induction machine with current controller and measurement noise 

Electromotoric force (electric/mechanic transformer) 

Mechanical power = torque x speed 

V6 engine with analytic loop handling 

Motor inertia and gearbox model for r3 joints 1,2,3 

Motor inertia and gearbox model for r3 joints 4,5,6 

Motor model including current controller of r3 motors 

Axis model of the r3 joints 1,2,3 

Axis model of the r3 joints 4,5,6 

Adaptor to allow direct connections to the subconnectors of FlangeWithBearing 

Revolute joint (1 rotational degreeoffreedom, 2 potential states, optional axis flange) 

Joint (no mass, no inertia) that describes an ideal rolling wheel set (two ideal rolling wheels connected together by an axis) 

Universal  spherical  revolute joint aggregation (no constraints, no potential states) 

Spherical  spherical  revolute joint aggregation with mass (no constraints, no potential states) 

Planar revolute  revolute  revolute joint aggregation (no constraints, no potential states) 

Revolute joint where the rotation angle is computed from a length constraint (1 degreeoffreedom, no potential state) 

Propagate 1dim. support torque to 3dim. system (provided world.driveTrainMechanics3D=true) 

1D inertia attachable on 3dim. bodies (3D dynamic effects are taken into account if world.driveTrainMechanics3D=true) 

1D inertia attachable on 3dim. bodies (3D dynamic effects are taken into account) 

1D gearbox with arbitrary shaft directions and 3dim. bearing frame (3D dynamic effects are taken into account provided world.driveTrainMechanics3D=true) 

Ideal rolling wheel set consisting of two ideal rolling wheels connected together by an axis 

Linear 1D rotational spring and damper in parallel (phi and w are not used as states) 

Flange fixed in housing at a given angle 

1Drotational component with inertia 

1dim. rotational rigid component without inertia, where right flange is rotated by a fixed angle with respect to left flange 

Linear 1D rotational spring 

Linear 1D rotational damper 

Linear 1D rotational spring and damper in parallel 

Backlash connected in series to linear spring and damper (backlash is modeled with elasticity) 

Backlash connected in series to linear spring and damper (backlash is modeled with elasticity; at start of contact the flange torque can jump, contrary to the ElastoBacklash model) 

Coulomb friction in bearings 

Brake based on Coulomb friction 

Clutch based on Coulomb friction 

Series connection of freewheel and clutch 

Ideal gear without inertia 

Gear with mesh efficiency and bearing friction (stuck/rolling possible) 

Ideal planetary gear box 

Realistic model of a gearbox (based on LossyGear) 

Initializes a flange with predefined angle, speed and angular acceleration (usually, this is reference data from a control bus) 

Set phi_start 

Set w_start 

Set a_start 

Set flange.tau to zero 

Definition of relative state variables 

Signal adaptor for a Rotational flange with torque as output and angle, speed, and optionally acceleration as inputs (especially useful for FMUs) 

Forced movement of a flange according to an angle signal 

Forced movement of a flange according to an angle and speed signal 

Ideal sensor to measure the relative angle between two flanges 

Ideal sensor to measure the relative angular velocity between two flanges 

Ideal sensor to measure the relative angular acceleration between two flanges 

Ideal sensor to measure the torque between two flanges (= flange_a.tau) 

Ideal sensor to measure the power between two flanges (= flange_a.tau*der(flange_a.phi)) 

Ideal sensor to measure the torque and power between two flanges (= flange_a.tau*der(flange_a.phi)) and the absolute angular velocity 

Forced movement of a flange according to a reference angle signal 

Forced movement of a flange according to a reference angular velocity signal 

Forced movement of a flange according to an acceleration signal 

Forced movement of a flange according to an angle, speed and angular acceleration signal 

Input signal acting as external torque on a flange 

Input signal acting as torque on two flanges 

Linear dependency of torque versus speed 

Quadratic dependency of torque versus speed 

Constant torque, not dependent on speed 

Constant torque changing sign with speed 

Constant speed, not dependent on torque 

Constant torque, not dependent on speed 

Partial model for a component with two rotational 1dim. shaft flanges 

Partial model for a component with one rotational 1dim. shaft flange and a support used for graphical modeling, i.e., the model is build up by draganddrop from elementary components 

Partial model for a component with two rotational 1dim. shaft flanges and a support used for graphical modeling, i.e., the model is build up by draganddrop from elementary components 

Partial model for the compliant connection of two rotational 1dim. shaft flanges 

PartialCompliantWithRelativeStates Partial model for the compliant connection of two rotational 1dim. shaft flanges where the relative angle and speed are used as preferred states 

PartialElementaryOneFlangeAndSupport Obsolete partial model. Use PartialElementaryOneFlangeAndSupport2. 

PartialElementaryOneFlangeAndSupport2 Partial model for a component with one rotational 1dim. shaft flange and a support used for textual modeling, i.e., for elementary models 

PartialElementaryTwoFlangesAndSupport Obsolete partial model. Use PartialElementaryTwoFlangesAndSupport2. 

PartialElementaryTwoFlangesAndSupport2 Partial model for a component with two rotational 1dim. shaft flanges and a support used for textual modeling, i.e., for elementary models 

Partial model of a torque acting at the flange (accelerates the flange) 

Partial model to measure a single relative variable between two flanges 