WOLFRAM SYSTEMMODELER

QuadraticSpeedDependentForce

External force and torque acting at frame_b, defined by 3 input signals and resolved in world frame

Diagram

Wolfram Language

In[1]:=
SystemModel["PlanarMechanics.Sources.QuadraticSpeedDependentForce"]
Out[1]:=

Information

Model of a force quadratic dependent on the velocity of the flange. The force can be resolved in a world frame, or a relative speed can be used by selecting resolve_frame to use the extra frame_resolve.

This model is e.g. suitable to simulate aerodynamic drag forces.

Parameters (9)

resolveInFrame

Value: Modelica.Mechanics.MultiBody.Types.ResolveInFrameA.world

Type: ResolveInFrameA

Description: Frame in which output vector r_rel shall be resolved (1: world, 2: frame_a, 3: frame_resolve)

F_nominal

Value:

Type: Force (N)

Description: Nominal force (if negative, torque is acting as load)

v_nominal

Value:

Type: Velocity (m/s)

Description: Nominal speed

tau_nominal

Value:

Type: Torque (N·m)

Description: Nominal torque (if negative, torque is acting as load)

w_nominal

Value:

Type: AngularVelocity (rad/s)

Description: Nominal speed

animation

Value: true

Type: Boolean

Description: = true, if animation shall be enabled

N_to_m

Value: planarWorld.defaultN_to_m

Type: Real (N/m)

Description: Force arrow scaling (length = force/N_to_m)

Nm_to_m

Value: planarWorld.defaultNm_to_m

Type: Real (N·m/m)

Description: Torque arrow scaling (length = torque/Nm_to_m)

zPosition

Value: planarWorld.defaultZPosition

Type: Length (m)

Description: Position z of cylinder representing the fixed translation

Inputs (3)

diameter

Default Value: planarWorld.defaultArrowDiameter

Type: Diameter (m)

Description: Diameter of force arrow

color

Default Value: PlanarMechanics.Types.Defaults.ForceColor

Type: Color

Description: Color of arrow

specularCoefficient

Default Value: planarWorld.defaultSpecularCoefficient

Type: SpecularCoefficient

Description: Reflection of ambient light (= 0: light is completely absorbed)

Connectors (2)

frame_b

Type: Frame_b

Description: Coordinate system fixed to the component with one cut-force and cut-torque

frame_resolve

Type: Frame_resolve

Description: Coordinate system in which vector is optionally resolved, if useExtraFrame is true

Components (6)

planarWorld

Type: PlanarWorld

Description: Planar world model

absoluteVelocity

Type: AbsoluteVelocity

worldForce

Type: WorldForce

normalizeSpeeds

Type: MatrixGain

scaleForces

Type: MatrixGain

square

Type: SquaretimesSign