منابع مشابه
Active mechanical noise cancellation scanning tunneling microscope.
We present the design and performance of an active mechanical noise cancellation scanning tunneling microscope (STM). This system features two key parts: a "twin-tip" scanner and an active mechanical noise cancellation algorithm. The twin-tip scanner functions as two independent STMs which share nearly the same mechanical transfer function, allowing both STMs to sense nearly identical backgroun...
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The aim of this Project is to complete a first study of Active Noise Cancellation systems applicability to Unmanned Aerial Vehicles. The main motivation to this research is the EASA request to minimize noise from UAVs in populated areas, besides all other possible applications. At first, a brief introduction to the issue and ANC systems is made. Then, a physical model of propellers soundwaves i...
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Reaction wheels (RWs) used for attitude control of space vehicle systems usually encounter with undesired wide band noises. These noises which significantly affect the performance of regulator controller must tune the review or review rate of RWs. According to wide frequency band of noises in RWs the common approaches of noise cancellation cannot conveniently reduce the effects of the noise. Th...
متن کاملA Novel Cancellation Path Modeling Signal for Active Noise Control
A new on-line cancellation path modeling signal for active noise control is proposed in this paper. The signal is based on the spectrum of the disturbance signal, and is especially useful for the cancellation path modeling in active noise control when the disturbance signal is tonal. It is shown that using the proposed signal as the perturbation signal in modeling can significantly reduce the m...
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ژورنال
عنوان ژورنال: Shock and Vibration
سال: 2002
ISSN: 1070-9622,1875-9203
DOI: 10.1155/2002/264984