Adaptive Noise Control in One Dimensional Systems by Using a Pair of Sensor and Actuator
碩士 === 國立成功大學 === 航空太空工程學系 === 85 === Conventional noise control systems often utilize several sensors: at least one to measure the noise field and another one to measure the attenuated noise. However, theformer suffers from the so-called "acoustic...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1997
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| Online Access: | http://ndltd.ncl.edu.tw/handle/14406915696792579300 |
| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系 === 85 === Conventional noise control systems often utilize several
sensors: at least one to measure the noise field and another one
to measure the attenuated noise. However, theformer suffers
from the so-called "acoustic feedback" problem that often leads
to systeminstability. This thesis presents a new, simple and
yet effective configuration by usingonly one sensor for active
noise control. The controller is a finite impulse response
(FIR)adaptive filter with the filtered-X LMS algorithm. Active
noise control is conducted byfirst identifying the actuator
dynamics. Both simulations and experiments show that thissingle
sensor/actuator configuration can effectively attenuated the
low-frequency noise.
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