..., and the vibratory velocity amplitude shows a deviation of 0.5% in 8 min. 10 09 2010 18 07 2011 02 12 2011 02 12 2011 gain control gyroscopes vibrations gyroscope self-oscillation auto gain control averaging method A MEMS gyroscope is one of the most popular sensors...

...Ali Mahvash; Aouni A. Lakis An obstacle in diagnosis of multicomponent machinery using multiple sensors to acquire vibration data is firstly found in the data acquisition itself. This is due to the fact that vibration signals collected by each sensor are a mixture of vibration produced by different...

...Gregory Hagen We present algorithms based on stochastic averaging for estimating nonlinear feedback parameters obtained from time series data with application to noise-driven nonlinear vibration systems, with particular emphasis on limit-cycling thermo-acoustic systems. The harmonic and Gaussian...

... simulations are performed to validate the proposed methods and to demonstrate that rotational maneuvers and vibration suppression are accomplished in spite of the presence of model uncertainty and control saturation nonlinearity. The robustness of SMC only holds in the sliding mode domain (SMD) on all...

... a vibrational disturbance with a known frequency. Next, we develop feedforward adaptive filter methods for cases when a reference signal, which is highly correlated with the jitter disturbance, is available. A filtered-X recursive least-squares algorithm with an integrated bias estimator is proposed to deal...

...Joshua Vaughan; Paul Jurek; William Singhose Input shaping accomplishes vibration reduction by slightly increasing the acceleration and deceleration periods of the command. The increase in the deceleration period can lead to system overshoot. This paper presents a new class of reduced-overtravel...

.... This g-jitter vibration could interfere with the operation of sensitive onboard instrumentation. A special control approach is employed for the magnetic bearings to reject the imbalance disturbances. The stability, robustness, tracking, and disturbance rejection performances of the feedback control laws...

.../write head. Lateral vibration can be excited by disturbances in the form of pack runout, flange impacts, precurvature of the tape in its natural unstressed state, and spiral stacking as tape winds onto the take-up pack. The guide model incorporates nonlinear characteristics including preload...

... with minimum passenger discomfort. This requires control of the electric motor to start and stop the engine quickly and smoothly, without compromising the vehicle noise, vibration, and harshness signature. The issue becomes more critical in the case of diesel hybrids, as the peak compression torque is much...

... and Nonlinear Stiffness Coefficients ,” J. Microelectromech. Syst. 1057-7157 , 7 ( 2 ), pp. 172 – 180 . 10.1109/84.679344 Ayazi , F. , and Najafi , K. , 2001 , “ A HARPS Polysilicon Vibrating Ring Gyroscope ,” J. Microelectromech. Syst. 1057-7157 , 10 ( 2 ), pp. 169 – 179 . 10.1109...

... and electromagnetic actuators. The cantilever beam acts as the moving mass, vibrating at the projectile roll frequency to generate control force. First, a dynamic model is developed to describe the system. Then the natural frequency, damping ratio, and length of the beam are varied to study their affects on force...

...S. Nima Mahmoodi; Mehdi Ahmadian A novel active vibration control technique based on positive position feedback method is developed. This method, which is a modified version of positive position feedback, employs a first-order compensator that provides damping control and a second-order compensator...

...Tao Tao; Chakradhar Byreddy; Kenneth D. Frampton The purpose of this work is to experimentally demonstrate a fault-tolerant active vibration control system. Active vibration control is achieved using piezoceramic sensors and actuators (transducers) that are attached to a simply supported beam...

...Haiyu Zhao; Christopher D. Rahn Precise tension and speed control of axially moving material systems enables high speed processing of paper, plastics, fibers, and films. A single span model is developed that includes distributed longitudinal vibration, a torque-controlled roller at the left...

...Daniel Zameroski; Gregory Starr; John Wood; Ron Lumia Residual vibration suppression in freely suspended payload transports has been the focus of extensive work in the past. Many methods have been used to address this problem, including both open-loop motion planning and closed-loop control...

...Douglas Ivers; Robert Wilson, Ph.D.; Donald Margolis A classic tuned vibration absorber (TVA) is a device that, when attached to a structure, will greatly reduce the motion of the attachment at a specific excitation frequency. When a fixed frequency input is present, a TVA can be manufactured...

... characteristics of the pump, other vibration aspects of the machine are also expected to be reduced. In particular, the objectives of this paper are aimed at reducing the noise that is generated by the pump. This paper begins by considering the theoretical torque ripple that is created by the discrete pumping...

...K. Krishnan Nair; Anne S. Kiremidjian In this paper, a time series based detection algorithm is proposed utilizing the Gaussian Mixture Models. The two critical aspects of damage diagnosis that are investigated are detection and extent. The vibration signals obtained from the structure are modeled...

...F. Braghin; M. Brembilla; G. Brambilla; M. Pezzola An experimental and numerical experience was carried out to investigate the nonlinear dynamic response of the forecarriage of a motorcycle, paying attention to a particular type of vibration that occurs during the braking. In fact, it was found...

...Roberto Bassani Permanent magnet pairs have negligible friction; however, the levitating member is unstable. In this paper, it is demonstrated that if the other member vibrates in a suitable way, the levitating one may be stable. Furlani , P. F. , 2001 , Permanent Magnets...