http://milad-engc.persiangig.com/Recent.pdf

Recent research advances on the dynamic analysis of composite shells: 2000-2009

This paper provides an overview of recent trends and developments in medical robotics for minimally invasive soft tissue surgery, with a view to highlight some of the issues posed and solutions proposed in the literature. The paper includes a thorough review of the literature, which focuses on soft tissue surgical robots developed and published in the last five years (between 2004 and 2008) in indexed journals and conference proceedings. Only surgical systems were considered; imaging and diagnostic devices were excluded from the review. The systems included in this paper are classified according to the following surgical specialties: neurosurgery; eye surgery and ear, nose, and throat (ENT); general, thoracic, and cardiac surgery; gastrointestinal and colorectal surgery; and urologic surgery. The systems are also cross-classified according to their engineering design and robotics technology, which is included in tabular form at the end of the paper. The review concludes with an overview of the field, along with some statistical considerations about the size, geographical spread, and impact of medical robotics for soft tissue surgery today.

A review of medical robotics for minimally invasive soft tissue surgery

The present literature review focuses on geometrically non-linear free and forced vibrations of shells made of traditional and advanced materials. Flat and imperfect plates and membranes are excluded. Closed shells and curved panels made of isotropic, laminated composite, piezoelectric, functionally graded and hyperelastic materials are reviewed and great attention is given to non-linear vibrations of shells subjected to normal and in-plane excitations. Theoretical, numerical and experimental studies dealing with particular dynamical problems involving parametric vibrations, stability, dynamic buckling, non-stationary vibrations and chaotic vibrations are also addressed. Moreover, several original aspects of non-linear vibrations of shells and panels, including (i) fluid–structure interactions, (ii) geometric imperfections, (iii) effect of geometry and boundary conditions, (iv) thermal loads, (v) electrical loads and (vi) reduced-order models and their accuracy including perturbation techniques, proper orthogonal decomposition, non-linear normal modes and meshless methods are reviewed in depth.

/pdf/non-linear-vibrations-of-shells-a-literature-review-from-l8iw4bsr7f.pdf

Non-linear vibrations of shells: A literature review from 2003 to 2013

An overview of layerwise theories for composite laminates and structures: Development, numerical implementation and application

Single-port laparoscopy (SPL) has attracted continuous attention in the past decade due to the potential of generating better surgical outcomes than the traditional multiport laparoscopy. In order to ease the challenging surgical manipulation tasks using manual tools in SPL, several robotic systems were constructed to provide surgeons an intuitive way to operate. With possible improvements identified, the SJTU unfoldable robotic system (SURS) for SPL is developed for improved system specifications. The SURS can be deployed into abdomen through a $\phi$ 12-mm port in its folded configuration and can then be unfolded for dual-arm surgical interventions with onboard 3-D visual guidance. A few key design concepts which lead to the specification improvements are elaborated. The design descriptions, kinematics modeling, actuation compensations, and experimental characterizations are detailed to demonstrate the potentials of the SURS.

Development of the SJTU Unfoldable Robotic System (SURS) for Single Port Laparoscopy

Whenever the hinge axis of aircraft wing rotates, its stiffness varies. Also, there are nonlinearities in the connection of the actuator and the hinge axis, and it is necessary to inspect the coupled effects between the actuator dynamics and the hinge nonlinearity. Nonlinear aeroelastic characteristics are investigated by using the iterative V-g method. Time domain analyses are also performed by using Karpel's minimum state approximation technique. The doublet hybrid method(DHM) is used to calculate the unsteady aerodynamic forces in subsonic regions. Structural nonlinearity located in the load links of the actuator is assumed to be friction. The friction nonlinearity of an actuator is identified by using the describing function technique. The nonlinear flutter analyses have shown that the flutter characteristics significantly depends on the structural nonlinearity as well as the dynamic stiffness of an actuator. Therefore, the dynamic stiffness of an actuator as well as the nonlinear effect of hinge axis are important factors to determine the flutter stability.

/pdf/flutter-characteristics-of-aircraft-wing-considering-control-4ly1qrddel.pdf

Flutter Characteristics of Aircraft Wing Considering Control Surface and Actuator Dynamics with Friction Nonlinearity

Development of a 5-DOF Laparoscopic Assistant Robot

Development of a flexible-rigid endoscopic robot system for NOTES

This research was supported by Agency for Defense Development (ADD) and the Ministry of Science and Technology(National Research Laboratory Program) in the Republic of Korea. This support is gratefully acknowledged.

Won-Ho Shin

Papers

Flutter Characteristics of Aircraft Wing Considering Control Surface and Actuator Dynamics with Friction Nonlinearity

Development of a 5-DOF Laparoscopic Assistant Robot

Development of a flexible-rigid endoscopic robot system for NOTES

Supersonic Nonlinear Flutter Analysis of Missile Fin Considering Dynamic Stiffness of Actuator

Design of thermal imprinting system with uniform residual thickness