RateLimiter
This block sets a limit on the signal's derivative.
Library
Activate/Hybrid
Description
The RateLimiter block sets a limit (maximum or minimal value) on the signal's derivative. When the derivative is larger than MaxSlope, the output is calculated by following rule
y(i) = y(i-1) + MaxSlope*step
When the derivative is smaller than MinSlope, the output is calculated by following rule
y(i) = y(i-1) + MinSlope*step
where step is the sample time in the discrete case, and integration step in the continuous case. When the derivative is between MaxSlope and MinSlope, the output is
y(i) = u(i)
When parameter InitialOutput is different from input signal when simulation starts, the initial output is calculated by following rule In case system is continuous or signal driven by non-periodic events
y(0) = u(0)
In case system is discrete, namely driven by periodic events
y(0) = y(initial) + rate*step, where rate = (u(0)-y(initial))/Ts, rate should be limited between MaxSlope and MinSlope.
This block supports double data type.
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
upper | Max slope | Maximum allowed derivative of input signal | Matrix | |
lower | Min slope | Minimum allowed derivative of input signal | Matrix | |
init | Initial output | Initial output of the block. Depends on the input when simulation is started. | Matrix |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
Port 1 | explicit | input | 1 | |
Port 2 | explicit | output | 1 |
Advanced Properties
| Name | Value | Description |
|---|---|---|
always active | no | Standard mode activated |
direct-feedthrough | yes | |
zero-crossing | no | |
mode | no | |
continuous-time state | no | |
discrete-time state | no |