Gearbox

Realistic model of a gearbox (based on LossyGear)

    Gearbox

Library

Mechanics/Rotational/Components

Description

This component models the essential effects of a gearbox, in particular

  • in component lossyGear
    • gear efficiency due to friction between the teeth
    • bearing friction
  • in component elastoBacklash
    • gear elasticity
    • damping
    • backlash

The inertia of the gear wheels is not modeled. If necessary, inertia has to be taken into account by connecting components of model Inertia to the left and/or the right flange of component Gearbox.

Parameters

Gearbox_0

NameLabelDescriptionData TypeValid Values

mo_useSupport

useSupport

= true, if support flange enabled, otherwise implicitly grounded

Number

0
1

mo_ratio

ratio

Transmission ratio (flange_a.phi/flange_b.phi)

Scalar

mo_lossTable

lossTable

Array for mesh efficiencies and bearing friction depending on speed (see docu of LossyGear)

Matrix of size Mx5

mo_c

c

Gear elasticity (spring constant)

Scalar

mo_d

d

(relative) gear damping

Scalar

mo_b

b

Total backlash

Scalar

mo_useHeatPort

useHeatPort

=true, if HeatPort is enabled

Number

0
1

mo_T

T

Fixed device temperature if useHeatPort = false

Scalar

Gearbox_1

NameLabelDescriptionData TypeValid Values

mo_stateSelect

stateSelect

Priority to use phi_rel and w_rel as states

Structure

mo_stateSelect/choice1

StateSelect.never

Number

0
1

mo_stateSelect/choice2

StateSelect.avoid

Number

0
1

mo_stateSelect/choice3

StateSelect.default

Number

0
1

mo_stateSelect/choice4

StateSelect.prefer

Number

0
1

mo_stateSelect/choice5

StateSelect.always

Number

0
1

Gearbox_2

NameLabelDescriptionData TypeValid Values

mo_phi_rel

phi_rel

phi_rel

Structure

mo_phi_rel/fixed

fixed

Cell of scalars

true
false

mo_phi_rel/start

start

Cell of scalars

mo_w_rel

w_rel

w_rel

Structure

mo_w_rel/fixed

fixed

Cell of scalars

true
false

mo_w_rel/start

start

Cell of scalars

mo_a_rel

a_rel

a_rel

Structure

mo_a_rel/fixed

fixed

Cell of scalars

true
false

mo_a_rel/start

start

Cell of scalars

Ports

NameTypeDescriptionIO TypeNumber

flange_a

implicit

Flange of left shaft

input

1

flange_b

implicit

Flange of right shaft

output

1

Port 3

implicit

Support/housing of component

input

mo_useSupport

Port 4

implicit

Optional port to which dissipated losses are transported in form of heat

input

mo_useHeatPort