کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
753155 1462395 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Active control of radiated sound power of a smart cylindrical shell based on radiation modes
ترجمه فارسی عنوان
کنترل فعال قدرت صدای شعاعی پوسته استوانه ای هوشمند بر اساس حالت تابش
کلمات کلیدی
کنترل آکوستیک ساختاری فعال حالت تابش، بازده رادیویی، پوسته استوانه ای هوشمند، مبدل های پیزوالکتریک
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Radiation modes and radiation efficiencies of a smart cylindrical shell are obtained.
• Active structural acoustic control (ASAC) is used to attenuate the radiated sound.
• The radiated sound power is controlled by eliminating the first radiation mode.
• The proposed method leads to a sharp decrease in the control dimensionality.
• The results show the advantages of ASAC over active vibration control (AVC).

A new approach is proposed in this paper based on radiation modes to control the radiated sound pressure of a smart cylindrical shell equipped with piezoelectric sensor and actuators. The radiation modes determine the specific distribution of normal velocity of the shell that independently radiates sound to the surrounding space. In this study, the first radiation mode is controlled since it is the most effective mode in terms of the radiated power. The results indicate that most of the sound power is attenuated by controlling only this mode. The extended Hamilton’s principle, the Sanders shell theory and the assumed mode method are used to derive the equations of motion in a state space form that is suitable to design the controller. The radiated sound pressure is calculated using the simplified Kirchhoff-Helmholtz integral along with a Kalman filter to observe the system states, and a modified higher harmonic control (MHHC) is designed to attenuate the sound power. A numerical simulation demonstrated the effectiveness of the proposed approach compared to active vibration control (AVC) in attenuating the radiated sound in the low frequency domain.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 114, 15 December 2016, Pages 218–229
نویسندگان
, , , ,