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Keywords: damping
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Journal Articles
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. March 2013, 135(2): 021011.
Paper No: DS-11-1369
Published Online: November 7, 2012
... satisfied in planar kinematic chains [ 13 ]. (A2) There exists a damping force - k v ( q 1 ) q · 1 in the q 1 direction, where the damping coefficient k v is a bounded and piecewise continuous 4 function of q 1 . (A3...
Journal Articles
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. March 2012, 134(2): 024504.
Published Online: December 30, 2011
.... , Maschke , B. , and Escobar , G. , 2002 , “ Interconnection and Damping Assignment Passivity-Based Control of Port-Controlled Hamiltonian Systems ,” Automatica , 38 , pp. 585 – 596 . 10.1016/S0005-1098(01)00278-3 13 Ortega , R. , van der Schaft , A. J. , Maschke , B. , and...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. January 2012, 134(1): 011017.
Published Online: December 5, 2011
...Hadi Yagubizade; Mohammad I. Younis This paper presents an investigation into the nonlinear effect of squeeze-film damping on the response of a clamped–clamped microbeam to mechanical shock. In this work, we solve simultaneously the nonlinear Reynolds equation, to model squeeze-film damping...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. January 2012, 134(1): 011005.
Published Online: December 2, 2011
... in time domain to characterize the damping coefficient of a continuum structure, particularly, its applications for analyzing the damping effect of a highly damped compliant finger on contact-induced forces and stresses. With the aid of Rayleigh damping and explicit dynamic finite element analysis...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. November 2011, 133(6): 061020.
Published Online: November 23, 2011
...Matthew B. Greytak; Franz S. Hover First-excursion times have been developed extensively in the literature for oscillators; one major application is structural dynamics of buildings. Using the fact that most closed-loop systems operate with a moderate to high damping ratio, we have derived a new...
Journal Articles
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. November 2011, 133(6): 064502.
Published Online: November 21, 2011
... the chamber pressure. The nonlinearities involved are flow-pressure characteristics of the solenoid valves, the pressure dynamics of the chamber due to varying volume, and a variable damping nonlinearity. We develop a parametric model that is linear in the unknown parameters of the system using...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. September 2011, 133(5): 051007.
Published Online: August 1, 2011
... presented for a string PDE and a shear beam PDE, both with Kelvin–Voigt (KV) damping and free-end nonlinearities of a potentially destabilizing kind. String and beam simulation results illustrate the merits of the gain scheduling approach over the linearization based design. 12 12 2008 26 02 2011...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. May 2011, 133(3): 031008.
Published Online: March 24, 2011
... switch-mode CVT, which is then placed in state-space form. The state-space formulation is leveraged to analyze the system stability and perform simple optimization of the switch time and damping rate of the spring over the first switching period. The results of this work are that a stable equilibrium...
Journal Articles
Article Type: Model Validation And Identification
J. Dyn. Sys., Meas., Control. November 2010, 132(6): 061403.
Published Online: November 9, 2010
...Corina Sandu; Steve Southward; Russell Richards Magnetorheological (MR) fluid dampers have a semicontrollable damping force output that is dependent on the current input to the damper, as well as the relative velocity. The mechanical construction, fluid properties, and embedded electromagnet result...
Journal Articles
Article Type: Modeling Applications
J. Dyn. Sys., Meas., Control. November 2010, 132(6): 061502.
Published Online: October 29, 2010
...A. K. Samantaray; S. S. Dasgupta; R. Bhattacharyya The rotating internal damping or nonconservative circulatory force in a rotor shaft system causes instability beyond a certain threshold rotor spinning speed. However, if the source loading of the drive is considered, then the rotor spin is...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. July 2010, 132(4): 041012.
Published Online: June 18, 2010
...Keith W. Wait; Michael Goldfarb The authors present a model-based analysis of a position-velocity-acceleration-controlled pneumatic actuator that indicates that supplementing the pneumatic actuator with mechanical damping can significantly increase the gain margin, tracking accuracy, and...
Journal Articles
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. January 2010, 132(1): 014505.
Published Online: December 18, 2009
...Raymond Manning; Jeffrey Clement; Dooroo Kim; William Singhose The large-amplitude and lightly-damped oscillation of crane payloads is detrimental to safe and efficient operation. The problem is further complicated when the payload creates a double-pendulum effect. Previous researches have shown...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. September 2009, 131(5): 051012.
Published Online: August 19, 2009
... damping in the sub- and supercritical regions. The feedforward systems attenuated vibratory responses at the speed of rotation and its harmonic. The attenuation achieved was about 20 dB depending on the rotor speed. Also, discrete-time CC algorithm is shown to have a feedback equivalent circuit. The...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. September 2009, 131(5): 051008.
Published Online: August 18, 2009
... 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...
Journal Articles
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. September 2009, 131(5): 054502.
Published Online: August 18, 2009
...Daniel E. Williams Long appreciated advantageous stability and performance properties of “skyhook damping” are dependent on availability of an inertially referenced velocity signal. In this work a practical complementary filter using acceleration and position measurements is proposed to construct a...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. September 2009, 131(5): 051005.
Published Online: August 17, 2009
... combined structure from those in the substructure models. In particular, we address frequency and damping uncertainties at the component level. The approach first considers the robustness of synthesized flexible systems. It is then extended to deal with nonsynthesized dynamic models with component-level...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. July 2009, 131(4): 041002.
Published Online: April 27, 2009
...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...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. May 2009, 131(3): 031009.
Published Online: March 20, 2009
...Antranik A. Siranosian; Miroslav Krstic; Andrey Smyshlyaev; Matt Bement Explicit motion-planning reference solutions are presented for flexible beams with Kelvin–Voigt (KV) damping. The goal is to generate periodic reference signals for the displacement and deflection angle at the free-end of the...
Journal Articles
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. March 2009, 131(2): 024501.
Published Online: February 4, 2009
...Massimo Sorli; Laura Gastaldi The gain values that can be imposed in pneumatic system controllers are bounded to the restricted actuator bandwidth. That limitation, with low damping and stiffness due to the air compressibility, seriously affects accuracy and repeatability when varying payloads or...
Journal Articles
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. July 2008, 130(4): 041006.
Published Online: June 6, 2008
... stability while the MHAVC feedforward suppresses steady-state vibration. It is found that there is a range of P and D feedback gains that ensures both MHAVC convergence and closed-loop stability robustness with respect to shaft internal damping induced whirl and misalignment effects. Finally, it is...