PT1-filter

Frequency response

The PT1 filter has the transmission response of a first order delay element. Contrary to the other axis filters, it is parameterised by specifying a time constant (filter[i].time_constant). No filter prototype needs to be specified for this filter type. To activate the filter, an order > 1 (filter[i].order) must be set.

Time constant of the PT1 filter
Time constant of the PT1 filter

The figure shows the amplitude response of the PT2 filter depending on the filter[i].time_constant.

Example

example

Axis filters: PT1 filter with time constant of 0.01 seconds:

filter[0].enable

1

filter[0].order

1

filter[0].type

PT1

filter[0].time_constant

10000

filter[0].share_percent

100

Example

example

Additional interface: PT1 filter with time constant of 0.01 seconds

Lr_param.add_interface.enable

1

lr_param.add_interface.filter[0].enable

1

lr_param.add_interface.filter[0].order

1

lr_param.add_interface.filter[0].type

PT1

lr_param.add_interface.filter[0].time_constant

10000

lr_param.add_interface.filter[0].share_percent

100