{'fraction_non_alphanumeric': 0.011970534069981584, 'fraction_numerical': 0.0, 'mean_word_length': 5.709876543209877, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
ACTIVE VIBRATION CONTROL IN BULDING-LIKE STRUCTURES USING PIEZOELECTRIC ACTUATORS AND POSITIVE ACCELERATION FEEDBACK

This paper is about the suppression of mechanical vibrations in a building-like structure with two dissimilar actuators. The first case is a building like mechanical structure with a piezoelectric patch actuator on its base. For the second case the piezoelectric patch was substituted for another kind of piezoactuator, where the piezoelectric elements are enclosed in a mechanical frame. The systems were modeled using finite element analysis and validated using experimental modal analysis techniques. The control law used to properly attenuate the mechanical vibrations with excitation frequencies, in a given frequency band, is based on the Positive Acceleration Feedback, implemented with one and multiple virtual passive absorbers tuned at different vibration modes. The systems models and the proposed active vibration control scheme are validated on an experimental setup and some experimental results are presented to show the closed-loop dynamic performance.