| 摘要 |
A piezoelectric fan comprises a blade (110, 210, 310, 410, 510, 610), a piezoelectric actuator patch (120, 220, 320, 420, 520 ,620, 811) adjacent to the blade, and a piezoelectric sensor patch (130, 230, 330, 430, 530, 630, 812) adjacent to one of the piezoelectric actuator patch and the blade. The piezoelectric sensor patch measures a voltage proportional to a deflection of the piezoelectric actuator patch and a deflection of a tip of the blade and uses that voltage to generate an input signal to an active feedback controller (840) that in turn ensures that the oscillation amplitude of the blade satisfies certain cooling specifications.
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