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Phase-lead compensator with specified centre frequency and lead.

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Phase-lead compensators are used in feedback control, usually to improve gain margins and add additional damping to a system.

This function provides an easy way to construct a phase-lead compensator with specified centre frequency and lead. The gain at the centre frequency is zero, making it particularly useful for adding phase margin at a specified crossover frequency.

PHLEAD extends the functionality of Control System Toolbox, and is compatible with it.


C = PHLEAD(W, LEADDEG) returns a state-space representation of a phase ead compensator giving the specified phase lead angle LEADDEG and unity gain at W rad/sec.

Required Products Control System Toolbox
MATLAB release MATLAB 7.9 (R2009b)
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