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Discrete Blocks

The following blocks are defined as having a discrete time_mode

More about time_modes. 
Discrete block do not have events associated with them.
Integrator (Discrete)
Same as continuous integrator, but applies a local forward Euler method for integration.
​https://en.wikipedia.org/wiki/Euler_method#Using_step_size_equal_to_1_(h_=_1)​
Parameters, Inputs, Outputs, and Data Types are all the same as for the continuous integrator.
Unit Delay (Discrete)
Holds and delays the input by one Discrete Step.
Transfer Function (Discrete)
Implements a discrete transfer function as described in https://en.wikipedia.org/wiki/Z-transform#Transfer_function​
Parameters, Inputs, Outputs, and Data Types are all the same as for the continuous transfer function.
Zero Order Hold (Discrete)
​https://en.wikipedia.org/wiki/Zero-order_hold​
Derivative (Discrete)
Computes the first-order approximation of the first derivative of the input signal with respect to time.
Similar to Derivative block, but uses less states to compute the derivative.
PID (Discrete)
Implements a simple PID controller defined in https://en.wikipedia.org/wiki/PID_controller, but operates in discrete time.
Parameters
Kp: the proportional gain.
Ki: the integral gain.
Kd: the derivative gain.
Data Types
double
Filter (Discrete)
Implements a discrete filter similar to scipy.signal.lfilter.
Parameters
Filter Type: FIR or IIR
B coefficients
A coefficients (only applicable for IIR selection)
Data Types
double
Pulse
A source block that emits a pulse wave as defined in https://en.wikipedia.org/wiki/Pulse_wave.
Parameters
Amplitude: the value of the pulse wave when the wave is high.
Pulse width: the fraction between 0 and 1 of the period that the pulse wave is high.
Period: the length of time between two sequential rising edges of the pulse wave.
Phase delay: an amount time by which the first rising edge is delayed after the simulation start time.
Outputs
pulse wave signal
Data Types
double
Events
This block produces periodic events triggering majors steps for each rising edge and each falling edge.
Discrete Initializer
Outputs True for first discrete step, then outputs False there after. Or, outputs False for first discrete step, then outputs True there after.
Practical for cases where it is necessary to have some signal fed initially by some initialization, but then after from else in the model. 
VideoSource
A source block that emits R,G,B color channels as matrices from a video file (.mp4). Since the output type is uint8 it can only be consumed by a Python Script, Object Detection, Image Segmentation or Predictor blocks.
Parameters
File name: the video file to use as source data. Must be a valid mp4 video at a fixed resolution and framerate.
Outputs
3 x W x H matrix of uint8 values. 
Notes:
For more information on how to use the R,G,B pixel data, refer to the ImageSource block (found under Agnostic Blocks).
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Continuous Blocks

Agnostic Blocks

Last modified 1mo ago