Dynamometer

Dynamometer component

The Dynamometer component models a simple dynamometer providing a resistive load at the end of a power train. The dynamometer has rotary inertia and linear and quadratic damping. An optional real signal input is also provided for cases where a known load (torque) is applied to the input shaft.

Equations

Where



and





Connections

 Name Condition Description ID ${\mathrm{flange}}_{a}$ - Flange to drive shaft flange_a $\mathrm{speed}$ - Real output port for angular velocity speed Conditional real input port for the externally applied torque signal loss

Parameters

Symbol

Condition

Default

Units

Description

ID

-

$\mathbf{false}$

-

true - external load (torque) port is enabled

false - external load (torque) port is disabled

speed output unit

$-$

RPM



Defines the unit of the speed output. Three options are available:

 • RPM
 • user defined

outputunitmode

${k}_{\mathrm{ω}}$

$1$

$\frac{\left[{U}_{\mathrm{user}}\right]}{\frac{\mathrm{rad}}{s}}$

Defines the unit conversion factor from user defined unit [${U}_{\mathrm{user}}$] to rad/s.

userspeedscale

$J$

$-$

$1$

$\mathrm{kg}·{m}^{2}$

Rotary inertia of the Dynamometer

J

${d}_{\mathrm{lin}}$

$-$

$0$

$\frac{N·m}{\frac{\mathrm{rad}}{s}}$

Linear damping

d1

${d}_{\mathrm{quad}}$

$-$

$0$

$\frac{N·m}{{\left(\frac{\mathrm{rad}}{s}\right)}^{2}}$

d2

Initial Conditions

 Symbol Condition Default Units Description ID ${\mathrm{ω}}_{0}$ - $0$ $\frac{\mathrm{rad}}{s}$ Initial angular velocity of the Dynamometer w