Rate Limiter Dynamic

Limit rate of change of signal

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Libraries:
Simulink / Discontinuities

Description

The Rate Limiter Dynamic block limits the rising and falling rates of the signal.

The external signal up sets the upper limit on the rising rate of the signal.
The external signal lo sets the lower limit on the falling rate of the signal.

Follow these guidelines when using the Rate Limiter Dynamic block:

Ensure that the data types of up and lo are the same as the data type of the input signal u.
When the lower limit uses a signed type and the input signal uses an unsigned type, the output signal keeps increasing regardless of the input and the limits.
Use a fixed-step solver to simulate models that contain this block.
Because the Rate Limiter Dynamic block supports only discrete sample time.

Ports

Input

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u — Input signal
scalar

Input signal to the rate limiter algorithm.

lo — Limit of derivative for decreasing input
scalar

Dynamic value providing the limit of the falling rate of the input signal. Make the signal data type of lothe same data type of the input signal u.

up — Limit of derivative for increasing input
scalar

Dynamic value providing the limit of the rising rate of the input signal. Make the signal data type of upthe same data type of the input signal u.

Output

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Y — Output signal
scalar

Output signal from the rate limiter algorithm.

Block Characteristics

Data Types	`double` \| `fixed point` \| `integer` \| `single`
Direct Feedthrough	`no`
Multidimensional Signals	`no`
Variable-Size Signals	`no`
Zero-Crossing Detection	`no`

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

The code generator does not explicitly group primitive blocks that constitute a nonatomic masked subsystem block in the generated code. This flexibility allows for more efficient code generation. In certain cases, you can achieve grouping by configuring the masked subsystem block to execute as an atomic unit by selecting the Treat as atomic unit option.

PLC Code Generation
Generate Structured Text code using Simulink® PLC Coder™.

Fixed-Point Conversion
Design and simulate fixed-point systems using Fixed-Point Designer™.

Version History

Introduced before R2006a

Rate Limiter Dynamic

Description

Ports

Input

u — Input signal scalar

lo — Limit of derivative for decreasing input scalar

up — Limit of derivative for increasing input scalar

Output

Y — Output signal scalar