... 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...

... 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...

...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...

...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...

...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...

...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...

... 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...

... 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...

...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...

... 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...

...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...

... 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...

...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...

...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...

...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...

... nonlinear part is added to the linear control design. Based on the concept of feedback linearization ( 12 ), an additive control force is proposed that compensates for the nonlinear part of the passive isolator characteristic. Ideally, the nonlinear terms resulting from both the isolator and the controller...

... 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...

...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...

...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...

... 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...