Implement first-order lead-lag filter
Control and Measurements/Filters
The Lead-Lag Filter block implements the following transfer function:
This type of filter is used mainly for implementing lead-lag compensation in control systems. The key characteristics of the Lead-Lag Filter block are:
Input accepts a vectorized input of N signals, thus implementing N filters. This feature is particularly useful for designing controllers in three-phase systems (N=3).
The same block is used for continuous or discrete model. Changing the sample time Ts from 0 to a positive value automatically discretizes the filter, and vice versa.
Filter states can be initialized for specified DC inputs and outputs.
Specify the filter time constant(s) T1 in seconds.
Specify the filter time constant(s) T2 in seconds.
Specify the DC initial value of input and output signals. If the input signal is vectorized, specify a 1-by-N vector, where each value corresponds to a particular input.
Specify the sample time of the block, in seconds. Set to 0 to implement a continuous block.
|Sample Time||Specified in the Sample Time parameter|
Continuous if Sample Time = 0
|Scalar Expansion||Yes, of the parameters|
|States||One state per filter|
shows two uses of a vectorized Lead-Lag Filter.
The model sample time is parameterized with variable Ts (default value Ts = 50e-6). To simulate continuous filters, specify Ts = 0 in the MATLAB® Command Window before simulating the model.