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Keywords: feedback
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Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2011, 133(5): 051002.
Published Online: July 26, 2011
... 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...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2010, 132(5): 051002.
Published Online: August 18, 2010
... of an improved machining process through the use of active vibration damping. The tool holder employs a high-bandwidth piezoelectric actuator with an adaptive positive position feedback control algorithm for vibration and chatter suppression. In addition, instead of using external sensors, the proposed approach...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2010, 132(2): 021002.
Published Online: March 15, 2010
...Kiran D’Souza; Bogdan I. Epureanu An optimal sensitivity enhancing feedback control has been proposed recently. This method differs from previous sensitivity enhancing approaches because in addition to placing the closed-loop eigenvalues of the interrogated system, the eigenvectors are also...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2010, 132(1): 011001.
Published Online: January 8, 2010
...Mohammad Rastgaar; Mehdi Ahmadian; Steve Southward Orthogonal eigenstructure control is a novel active control method for vibration suppression in multi-input multi-output linear systems. This method is based on finding an output feedback control gain matrix in such a way that the closed-loop...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2009, 131(4): 041002.
Published Online: June 5, 2009
...M. R. F. Kidner; R. I. Wright Adaptable vibration neutralizers (AVNs) have become common in the literature as solutions to controlling a single but variable frequency disturbance, such as the interior sound field in a turboprop aircraft. This paper presents a study of the feedback control of five...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2009, 131(3): 031011.
Published Online: April 23, 2009
...Junghsen Lieh, Professor This paper studies the tire damping effect on the ride performance of a vehicle equipped with active suspension. Instead of first-order equation, a second-order approach is used for controller design. Both full-state and velocity-feedback concepts are considered...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. December 2007, 129(6): 763–770.
Published Online: July 9, 2007
... excited by a nonlinear feedback excitation through two lead zirconate titanate patches symmetrically bonded on both sides at the root of the beam. The nonlinear feedback excitation requires the measurement of the dynamics (e.g., velocity of one point at the tip of the beam) and a nonlinear feedback loop...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. October 2007, 129(5): 567–576.
Published Online: February 26, 2007
... on the quantitative feedback theory (QFT), which is a unified theory that emphasizes the use of feedback for achieving the desired system performance tolerances in the face of plant uncertainties and plant disturbances. Performance, stability, and robustness of the closed-loop system have been taken into account...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. December 2007, 129(6): 771–783.
Published Online: February 14, 2007
...L. J. Jiang; J. Tang; K. W. Wang The concept of using sensitivity-enhancing feedback control to improve the performance of frequency-shift-based structural damage identification has been recently explored. In previous studies, however, the feedback controller is designed to alter only the closed...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. February 2007, 129(1): 39–47.
Published Online: July 16, 2006
... be directly added to the structure where they are attached without the need of electronic integrators or differentiators. Inertial actuators have also the advantage that they do not need to react relative to a fixed base. In this paper, control with a shunted resistor, current feedback, and induced voltage...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. October 2006, 128(5): 627–634.
Published Online: March 28, 2006
...Cheng Zhao; Lesheng Chen; Dayue Chen A semi-active static output feedback variable structure control (VSC) strategy is presented to control a two-stage vibration isolation system in this paper. A continuous output feedback VSC controller which utilizes the measurements from a limited number...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. October 2006, 128(5): 653–665.
Published Online: February 7, 2006
... rotor system incorporating two radial magnetic bearings, with standard proportional-integral-derivative control employed in a parallel feedback loop for rotor levitation. An experimental investigation of controller performance is used to deduce the best choice of wavelet basis for various operating...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. April 2006, 128(2): 221–230.
Published Online: November 3, 2005
...Qinglei Hu; Guangfu Ma A hybrid control scheme for vibration reduction of flexible spacecraft during rotational maneuvers is investigated by using variable structure output feedback control (VSOFC) for attitude control and smart materials for active vibration suppression. The proposed control...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. April 2006, 128(2): 143–147.
Published Online: July 21, 2005
...S. M. Yang; G. J. Sheu It has been stated that a uniform rotating shaft in the Rayleigh beam model has only a finite number of critical speeds and precession modes. This paper presents a controller design of optimal sensor/actuator location and feedback gain for steady state unbalance response...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. April 2006, 128(2): 184–189.
Published Online: May 11, 2005
...Jenny Jerrelind; Harry Dankowicz A combined control scheme relying on feedback-based local control in the vicinity of periodic system responses and global control based on a coarse-grained approximation to the nonlinear dynamics is developed to achieve a desirable dynamical behavior of a Braille...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. August 2006, 128(4): 439–448.
Published Online: April 11, 2005
..., or, more importantly, its deteriorating impact on the vibration isolator performance, a nonlinear feedback control design is proposed. This design consists of two parts: a linear PID-based controller and a model-based nonlinear computed torque controller. The PID-based controller is used to shape...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. August 2006, 128(4): 413–428.
Published Online: April 1, 2005
... feedback control strategy, but the techniques described are relevant to other forms of smart damper control. Simon , D. and Ahmadian , M. , 2001 , “ Vehicle Evaluation of the Performance of Magneto Rheological Dampers for Heavy Truck Suspensions ,” J. Vibr. Acoust. 0739-3717 10.1115...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. February 2006, 128(1): 21–27.
Published Online: January 30, 2005
...S. Bowong; F. M. Moukam Kakmeni This paper presents a robust control scheme for a class of uncertain chaotic systems. The proposed feedback controller is composed by an uncertainty estimator and a backstepping feedback, so its implementation is quite simple and can be made on the basis...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. August 2005, 127(4): 362–369.
Published Online: December 16, 2004
...J. C. Ji; Colin H. Hansen This paper is concerned with a study of the influence of a time delay occurring in a PD feedback control on the dynamic stability of a rotor suspended by magnetic bearings. In the presence of geometric coordinate coupling and time delay, the equations of motion governing...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. July 2004, 126(3): 370–379.
Published Online: July 30, 2004
... is provided by the ER fluids and direct feedback control is provided by the PZT’s. New forms of transfer matrices are developed to include the effects of these smart materials. The modal equations of an equivalent uniform panel are converted into state-space form and digital stochastic feedback control...