Seismic performance of multistory frames with novel self-centering friction SMA dampers. [PDF]
Sci RepLi W +5 more
europepmc +1 more source
Magnetic Resonance in Chemistry, EarlyView.A new stopped‐flow instrument allows kinetic measurements of reactions 10 milliseconds after initiating them by mixing in a flow cell inserted into a standard NMR probe and spectrometer. High‐speed video, pressure and NMR line‐shape data are used to characterise mixing and stopping, and a protodeboronation reaction with a 5‐millisecond half‐life used ...
Andrew M. R. Hall +6 more
wiley +1 more source
Identification of Dynamic Parameters in a DC Motor Using Step and Ramp Torque Response Methods. [PDF]
Sensors (Basel)Cardona Soto JA +4 more
europepmc +1 more source
Vibration Attenuation of Cantilever Beam Using Electromagnetic Delayed Feedback
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT This study presents a combined analytical and numerical investigation of a single‐input single‐output delayed feedback controller designed to suppress vibrations in a cantilever beam actuated by an electromagnet positioned beneath its free end. An analytical model was developed using the linearized equation of motion for a transversely excited
Mohammad Alabdullah, Khaled Alhazza
wiley +1 more source
Seismic collapse capacity analysis of degrading SDOF systems with uncoupled negative and positive stiffness mechanism. [PDF]
Sci RepLiu Y, Sun F, Xu D, Yang J.
europepmc +1 more source
An Improved Air Film Model for Studying the Tilt Characteristics of Aerostatic Thrust Bearings
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT In this study, an improved mass‐spring model that treats the lubricating air film as distributed springs is proposed to calculate the static and dynamic angular stiffness of aerostatic thrust bearings. The proposed model refines the traditional mass‐spring model by introducing the spatially varying mechanical properties of the air film and the
Hui Zhuang, Jianguo Ding, Yu Chang
wiley +1 more source
Development of a novel pendulum column base isolation system with vertical negative stiffness (PC-VNS) for pile-like behavior for seismic applications. [PDF]
Sci RepAzizi A, Barghian M.
europepmc +1 more source
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT In this study, a robust position control strategy is presented for a two‐stage electro‐hydraulic actuator system using a fractional‐order proportional–integral–derivative (FOPID) controller tuned by Kirchhoff's law algorithm (KLA). Electro‐hydraulic systems exhibit strong nonlinearities, parameter uncertainties, and external disturbances ...
Ridvan Firat Cinar +8 more
wiley +1 more source
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT To address the dual challenges of routine driving vibration and impact loads in vehicle seat suspensions, a novel variable‐gap magnetorheological damper (VGMRD) is proposed. By combining a tapered piston with a conformal variable‐diameter cylinder, stroke‐dependent, dual‐mode damping characteristics are achieved without the need for complex ...
Min Wei +4 more
wiley +1 more source
Shaking table tests and analysis of the seismic behavior of external steel frames with viscoelastic nodal dampers. [PDF]
Sci RepShen J, Nie Q, Jia S.
europepmc +1 more source