... motion of the boom. The control logic is based on two contributions, a feedforward and a feedback one. In this study, a nonlinear flexible multibody model was created to simulate the boom’s dynamic behavior. This model was also used to develop and test the control logic. Finally, the control methodology...

...Tom C. Waite; Qingze Zou; Atul Kelkar In this article, an inversion-based feedforward control approach to achieve broadband active-noise control is investigated. Broadband active-noise control is needed in many areas, from heating, ventilation and air conditioning (HVAC) ducts to aircraft cabins...

... a feedforward control scheme. Theoretical approaches developed for the active control of beams have been shown to be useful as simplified models for the rotor scenario. This paper also introduces the time-domain LMS feedforward control strategy, used widely in the active control of sound and vibration...

...Mingsian R. Bai; Jienwen Lai A controller composed of a nonrecursive filter and a recursive filter is used to approximate the ideal controller for a spatially feedforward duct ANC problem. The nonrecursive part represents the dynamics of the transducer, whereas the recursive part is in the form...

... by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS . Manuscript received July 2000; Revised July 2001. Associate Editor: G. T. Flowers 01 July 2000 01 July 2001 vibration control feedforward vibrations rotors machine bearings...

... feedback damping feedforward least mean squares methods Acoustic noise has become an increasingly important issue, especially in the industrial environments, and more generally, in the enclosed spatial regions. Although active suppression of noise has been a technological objective for more than...

...Mingsian R. Bai; Yujeng Lin; Jian-Da Wu The active control technique for broadband attenuation of noise in ducts, using spatially feedforward structure, is investigated from the viewpoints of both acoustic analysis and control engineering. According to the previous work by Munjal and Eriksson [1...

.... Then, the transfer functions with feedback and feedforward controller using pseudo absolute velocity and displacement are (15) q ¨ i + q ¨ gi q ¨ gi = c i s + k i + c gi s 2 / s + a + k gi s 2 / s + a 2 m i...

... based on feedback structure, feedforward structure and hybrid structure are investigated. The multiple channel active control systems are implemented on the platform of a digital signal processor. Numerical simulation and experimental investigations indicate that the proposed methods are effective...