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  1. Enhancing active vibration control performances in a smart rotary sandwich thick nanostructure conveying viscous fluid flow by a PD controller
Enhancing active vibration control performances in a smart rotary sandwich thick nanostructure conveying viscous fluid flow by a PD controller
144 viewed

Enhancing active vibration control performances in a smart rotary sandwich thick nanostructure conveying viscous fluid flow by a PD controller

Zhang, Y

Enhancing active vibration control performances in a smart rotary sandwich thick nanostructure conveying viscous fluid flow by a PD controller

Zhang, Y ; Sharif University of Technology | 2024

144 Viewed
  1. Type of Document: Article
  2. DOI: 10.1080/17455030.2021.1948627
  3. Publisher: 2024
  4. Abstract:
  5. This is the first research on the smart control and frequency analysis of a cylindrical sandwich nanoshell in the framework of the numerical-based generalized differential quadrature method (2D-GDQM). The current sandwich smart nanostructure is made of a honeycomb core and piezoelectric face sheets as sensor and actuator (PFSA). For modeling the size-dependent nanoshell, nonlocal stress-strain gradient theory (NSGT) is presented. Also, this nanostructure is under conveying viscous fluid, and the related force is calculated by the modified formulation of Navier–Stokes. Also, the current structure rotates around its axial direction. The stresses and strains are obtained using the higher-order shear deformation theory (HSDT). The external voltage is applied to the sensor layer, and a Proportional-Derivative (PD) controller is used for sensor output control. Governing equations and boundary conditions of the cylindrical sandwich nanoshell are obtained by implementing Hamilton’s principle. The results show that the geometry of honeycomb core, PD controller, velocity of fluid flow, length to radius ratio (L/R), and applied voltage and have a significant influence on the frequency characteristics of a cylindrical sandwich nanoshell. Another important consequence is that applying the PD controller leads to an increase in the critical velocity of fluid flow in the smart nanostructure. © 2021 Informa UK Limited, trading as Taylor & Francis Group
  6. Keywords:
  7. Nanostructure ; NSGT ; PD controller ; Actuators ; Controllers ; Conveying ; Differentiation (calculus) ; Elasticity ; Honeycomb structures ; Nanostructured materials ; Numerical methods ; Shear deformation ; Strain ; Structural design ; Viscosity ; Viscous flow ; Active vibration controls ; Fluid-flow ; Honeycomb core ; Navier-Stokes equation ; Nonlocal stress ; Nonlocal stress-strain gradient theory ; Proportional-derivative controllers ; Sensors and actuators ; Strain gradient theory ; Stress/strain ; Nanoshells
  8. Source: Waves in Random and Complex Media ; Volume 34, Issue 3 , 2024 , Pages 1835-1858 ; 17455030 (ISSN)
  9. URL: https://www.tandfonline.com/doi/pdf/10.1080/17455030.2021.1948627