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Autopilot configuration reference: Difference between revisions
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Autopilot configuration reference (view source)
Revision as of 22:05, 30 September 2025
, 30 September→First order low pass filter <exponential>
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The <code><filter-time></code> also supports <code><property></code> and <code><expression></code>s to make the filter time variable. Also, you can define several <code><filter-time></code> elements and select between them by <code><condition></code> inside each filter-time tag. | The <code><filter-time></code> also supports <code><property></code> and <code><expression></code>s to make the filter time variable. Also, you can define several <code><filter-time></code> elements and select between them by <code><condition></code> inside each filter-time tag. | ||
Example: a 1Hz first order low pass filter | Example: a 1Hz first order low pass filter This filter could also be described as a 0.16 second lag or 0.16 second low pass filer | ||
<syntaxhighlight lang="xml"> | note: filter time = 1/1/(2*pi*cutoff-frequency) = 1/1/(2*3.1459*1) = 0.16 (aprox) .<syntaxhighlight lang="xml"> | ||
<filter> | <filter> | ||
<type>exponential</type> | <type>exponential</type> | ||
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The high pass filter is a typical [http://en.wikipedia.org/wiki/High-pass_filter high pass filter]. The magic euler number and the associated mathematical funtion exp() plays a major role here. As the name implies, higher frequencies can pass this filter while lower frequencies are cut. The frequency where only half of the input signal reaches the output is called cutoff frequency. This cutoff frequency is defined by the parameter <syntaxhighlight lang="xml" inline><filter-time></syntaxhighlight> and resolves as cutoff-frequency = 1/(2*pi*cutoff-frequency). It is commonly known as a wash-out filter or a 1st order lead filter | The high pass filter is a typical [http://en.wikipedia.org/wiki/High-pass_filter high pass filter]. The magic euler number and the associated mathematical funtion exp() plays a major role here. As the name implies, higher frequencies can pass this filter while lower frequencies are cut. The frequency where only half of the input signal reaches the output is called cutoff frequency. This cutoff frequency is defined by the parameter <syntaxhighlight lang="xml" inline><filter-time></syntaxhighlight> and resolves as cutoff-frequency = 1/(2*pi*cutoff-frequency). It is commonly known as a wash-out filter or a 1st order lead filter | ||
Example: a 1Hz first order high pass filter | Example: a 1Hz first order high pass filter. | ||
<syntaxhighlight lang="xml"> | <syntaxhighlight lang="xml"> | ||