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Navigation: Library > Iconic Diagrams > Mechanical > Translation > Actuators > positionactuator-relative |
  
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Iconic Diagrams\Mechanical\Translation\Actuators
Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Translation), Block Diagrams.
This model represents an ideal actuator. A position input signal is differentiated by a state variable filter to a velocity difference between its two terminals:
p_high.v = p_low.v + dx/dt;
p_low.F = p_high.F = indifferent;
Differentiation is performed by a state variable filter:
The S-domain function of this filter is equal to:
where f is the cut-off frequency. For very high values of f, the output becomes the pure derivative of the input. High values of f, however, increase simulations times. A good trade-off is a starting value of 1e5.
Ports |
Description |
p_high, p_low |
Both terminals of the Translation port p. |
Causality |
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fixed velocity out |
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Input |
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x |
Position [m]. |
Parameters |
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f v_initial |
Cut-off frequency of the differentiation [Hz]. Initial velocity output of the differentiation [m/s]. |