Cam and Crank - Crank Encoder v3
Cam and Crank - Crank Encoder v3 — The Crank Encoder
generates a binary crankshaft signal based on the defined number of teeth, the
number of missing teeth, the duty cycle and speed.
Library
Simulink® Real-Time™ - Speedgoat
Description
The Crank Encoder module generates a binary crankshaft signal based on the
defined number of teeth, the number of missing teeth, the duty cycle and speed. The
module integrates the crankshaft speed to obtain the shaft position. The optional
position output port allows the shaft position to be used in the user model. The
crank tooth pattern is repeated every 360 degrees. The shaft position is wrapped
between 0 and 720 degrees to match one cycle of the Cam Encoder module.
Ports
Outputs
-
Position
The current angle of the crankshaft module. The range is between 0
and 720 degrees.
Inputs
-
Speed
This optional input port defines the crankshaft speed in rpm. The
speed can be negative, which represents reverse rotation.
-
Duty Cycle
This optional input allows you to alter the duty cycle of the crank
teeth during model execution. Values between 0.0 and 1.0 are
accepted.
Parameters
Tab: Module Setup
-
Configurable I/O Module ID
This parameter associates a code module block with a configurable I/O module setup
block. Set this value to match the Module ID defined in the setup block of the
required configurable I/O module.
-
Channel Vector
A vector of channels this driver block entity will access. You can specify
channels in the range 1-N (N = the number of channels implemented in your specific
configuration file defined in the Setup block). The width of this vector also
defines the subsequent size of some of the following parameters if scalar expansion
applies. With a single block, all the channels of the block are synchronized.
-
Sample Time
Defines the base sample time at which this driver block gets its sample hit. This
parameter can also be set to -1 for inherited
sample time. The units are in seconds.
Crank Encoder Tabulator
-
Initial Angle Vector
This parameter sets the crankshaft angle at model start. The angle is
defined in degrees. The crankshaft will start turning from this
position. Use this parameter to emulate multiple mechanically coupled
crankshafts, which each have different angle offsets. This parameter is
only visible if your configuration file features Crank Encoder version
3.8 or later.
-
Initial Speed (rpm) Vector
This parameter defines the default speed of the crankshaft. The
default speed value is used initially at model start until a new speed
value is received at the input port of the block.
-
Number of Crank Teeth Vector
This parameter defines the number of teeth of the crankshaft. Note
that the number of teeth also includes any missing teeth.
-
Number of Missing Crank Teeth Vector
This parameter defines the number of missing teeth of the crankshaft.
The missing teeth appear at the end of each turn.
-
Initial Crank Teeth Duty Cycle Vector
This parameter defines the default duty cycle of the crank teeth.
Valid values are between 0.0 and 1.0. The default duty cycle is used
initially at model start. The duty cycle can be changed during model
execution by using the optional duty cycle input port.
-
Invert Crankshaft Signal Output
This checkbox defines the polarity of the crank signal.
Input and Output Port Configuration Tabulator
-
Show Speed Input Port
This checkbox enables the optional speed input port of the driver
block.
-
Show Duty Cycle Input Port
This checkbox enables the optional duty cycle input port of the driver
block.
-
Show Position Output Port
This checkbox enables the optional crankshaft position output port of
the driver block.