汽车英文翻译,大神呢?希望翻译的专业点
汽车英文翻译,大神呢?希望翻译的专业点
The problem of active control of noise and vibrations has been a subject of much research in
recent years. For an overview see e.g. (Kuo & Morgan, 1996), (Hansen & Snyder, 1997),
(Clark et al., 1998), (Elliot, 2001) and the references therein. The main part of the published
literature makes use of adaptive feedforward structures. Adaptive feedback compensation
(Aström & Wittenmark, 1995), in which the feedback law depends explicitly upon the error
sensor output has found little application in the active noise and vibration control field.
Feedforward control provides the ability to handle a great variety of disturbance signals,
from pure tone to a fully random excitation. However, the performance of feedforward
control algorithms can be degraded if disturbances are not measurable in advance (e.g. road
or wind noise) or the transmission path characteristics change rapidly. Contrarily, a
feedback controller can be designed to be less sensitive to system perturbations. Robustness
and performance, however, are conflicting design requirements. To achieve a good
attenuation of the vibrations the cancellation wave has to be very accurate, typically within
±5 degrees in phase and ±0.5 dB in amplitude.