کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
291857 509784 2006 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Active control of payload fairing noise
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Active control of payload fairing noise
چکیده انگلیسی

This work presents adaptive feedforward control using advanced structural–acoustic actuators to reduce the low-frequency acoustic transmission in a sub-scale composite fairing. The actuators, referred to as distributed active vibration absorbers, are multi-resonance devices specifically designed to produce high output forces over a large bandwidth as necessary for payload fairing noise control. Single- and multi-channel control configurations were implemented using external acoustic disturbance levels as high as 130 dB. Design parameters such as sample frequency, control filter length, reference source, and causality/delay were examined to determine impact on performance. The active control system reduced the broadband interior noise levels by up to 5 dB between 70 Hz and 200 Hz, and 10 dB at specific resonances.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 290, Issues 3–5, 7 March 2006, Pages 794–819
نویسندگان
, , , ,