The article presented two proposals for construction of a flexible element with variable stiffness, in which construction is limited, or is it completely eliminated the mechanical elastic member such as spring. Their properties vary in the extent applicable member stiffness and speed of reaction to contact with an obstacle. By limiting, or eliminating the mechanical elastic member can be achiev...

The impact of converter control strategies on the drive train of wind turbines during voltage dips is investigated in this paper using a full electromechanical model. Aerodynamics and tower vibration are taken into consideration by means of a simulation program, named FAST. Detailed gearbox and electrical subsystems are represented in MATLAB. The dynamic response of electromagnetic torque and i...

Article history: Received: 14.12.2015. Received in revised form: 08.04.2016. Accepted: 05.05.2016. Experimental measurements focused on the investigation of fiber behaviour are performed on an assembled weight-fibre-pulley-drive mechanical system. The carbon fibre driven by one drive is led over a pulley. At its other end there is a prismshaped steel weight which moves in a prismatic linkage on...

In this paper, a new method is proposed for the speed control of a three-phase current forced synchronous machine drive. This metohd is based on the use of an approximate constant commutation safety margin angle in the output thyristor bridge of the drive system as well as on the compenastion of stator magnetization reaction. The commutation process in the output converter of the machine driv...

introduction: this paper addresses a method for automatic detection of blood vessels in color fundus images which utilizes two main tools: image partitioning and local radon transform. material and methods: the input images are firstly divided into overlapping windows and then the radon transform is applied to each. the maximum of the radon transform in each window corresponds to the probable a...

Abstract Modern industrial process and household equipment more often use direct drives. According to European policy, Industry 4.0 new 5.0 need undertake the effort required ensure a sustainable, human-centric, resilient industry. One of main problems rotating machines is mechanical vibrations that can limit lifetime final product or machine in which they are applied. Therefore, analysis vibra...

Sungyon Lee, John W. M. Bush, A. E. Hosoi, and Eric Lauga 1 Hatsopoulos Microfluids Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 2 Department of Mathematics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 3 Department of Mechanical and Aerospace Eng...

Technologies for manufacturing hard disks are driven by the demand to increase magnetic storage capacity. However, the rate of increasing storage capacity is being slowed by the inability to produce ever closer flying heights between the sliders and disk surfaces. One of important requirements for flying height is to control the surface of substrates of hard disks to a super-smooth level to all...