Trusses are suitable load-bearing structural systems for heavy concentrated loads. In this paper, it is shown that it is possible to use active control mechanisms to enhance the load-bearing capacity of the trusses. Under heavy loading, some elernents of a truss might experience high stresses and show non-linear behavior, resulting in large deformations in the truss. Under such a condition, some elernents of the truss might damage which can lead to the collapse of the truss. Application of control forces on some of the degrees of freedom of the truss can render help the truss tolerate larger forces before its collapse. A neural network can then be trained to learn the relationship between the Information about the external loads on the truss, as input, and the required control forces, as output, and act as a neuro-controller for the truss. This method is explained and then tested on a smáli truss to show the capabilities of the method.
The present development of measuring technique in engineering industry emphasizes an inspection of components, particularly their precise geometrical shapes, a mutual orientation of their surfaces and axes and in addition it requires to meet these measuring demands right within the production process. Such an active production quality management is taking place together with a working machine control. This article deals with special sensors developed in the authors’ workplace that are specified for a rapid surface quality control of precise engineering components. The firm Mesing installs these sensors into measuring devices used in the Czech and Slovak automobile or bearing industries. and súčasnosti v oblasti vývoja meracej techniky v strojárskej výrobe sú preferované požiadavky na kontrolu geometrickej presnosti tvarov, vzájomnej polohy plôch a osí obrábaných súčiastok a okrem toho najmä na to, aby sa meracie operácie vykonávali priamo už pri obrábaní súčiastky, teda v procese výroby. Ide o aktívnu kontrolu kvality výroby spojenú so súčasným riadením obrábacieho stroja. Príspevok sa týka vývoja špeciálnych snímačov na pracovisku autorov, ktoré sú určené na rýchlu kontrolu kvality povrchu presných strojárskych súčiastok. Snímače inštaluje firma Mesing do meracích zariadení pre automobilový a ložiskársky priemysel v Českej a Slovenskej republike.
Synchronization with error bound of two non-identical forced oscillators is studied in the paper. By introducing two auxiliary autonomous systems, differential inequality technique and active control technique are used to deal with the synchronization of two non-identical forced oscillators with parameter mismatch in external harmonic excitations. Numerical simulations show the effectiveness of the proposed method.
Submitted paper deals with preparation of the X-DIA aeroelastic demonstrator component wind tunnel tests. The paper is focused on design, analysis and manufacturing of new composite foreplanes, FE analyses of the X-DIA Component Model (static
aeroelasticity, flutter, dynamic responses) and optimization study of the demonstrator wind tunnel support device. Analyses were performed by means of the MSC.NASTRAN program system. and Obsahuje seznam literatury