Lodz University of Technology Repository: Recent submissions
Wyświetlanie pozycji 1-20 z 2512
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Basic Study of Synchronization in a Two Degree of Freedom, Duffing Based System
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology. Press ; Division of Dynamics - Faculty of Mechanical Engineering, Lodz University of Technology, 2015)The issue of synchronization has been analyzed from many points of view since it was first described in 17th century. Nowadays the theory that stands behind it is so developed, it might be difficult to understand where ... -
Analytical and Experimental Determination of FML Stiffness and Strength Properties
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology. Press ; Division of Dynamics - Faculty of Mechanical Engineering, Lodz University of Technology, 2015)The paper presents application of analytical methods of determining the mechanical properties of Fibre Metal Laminates. Chosen micromechanical methods were employed to predict elastic moduli and strength of FML panels. ... -
Implementation of the New Control Methods in Simplification of a Multidimensional Control and Optimization of a Control System Parameters
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology. Press ; Division of Dynamics - Faculty of Mechanical Engineering, Lodz University of Technology, 2015)The main purpose of this text is to present application of the Largest Lyapunov Exponent (LLE) as a criterion for optimization of the new type of simple controller parameters. Investigated controller is the part of ... -
Fatigue of Steel Plates with Inclusions
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology. Press ; Division of Dynamics - Faculty of Mechanical Engineering, Lodz University of Technology, 2015)Manufactured by the end of the 80s in the last century steel structures were made of steel which contain significant amounts of non-metallic inclusions. As a result of many years of intensive use of the structures made ... -
Element Birth and Death Method Application to Lamellar Crack Analysis
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology. Press ; Division of Dynamics - Faculty of Mechanical Engineering, Lodz University of Technology, 2015)Load structure, the maximum permissible load is usually determined by the strength calculation (bearing data. Yield stress or strength of the material), or the parameters of fracture mechanics. The paper analyzes the ... -
Application of the Lyapunov Exponent Based on Current Vibration Control Parameter ( CVC) in Control of an Industrial Robot
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology. Press ; Division of Dynamics - Faculty of Mechanical Engineering, Lodz University of Technology, 2015)Controlling dynamics of industrial robots is one of the most important and complicated tasks in robotics. In some works [3, 7], there are algorithms of the manipulators steering with flexible joints or arms. However, ... -
Performance Improvement through the Vane Clocking Effect in a Two-Stage Impulse Turbine
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)The paper describes the experimental and numerical investigations of stator clocking effects on performance of a two-stage impulse turbine with low-aspect ratio airfoils. The data present the clocking effect that can be ... -
Multilevel Optimization of the Semi-Open Impeller in a Centrifugal Pump
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)Full optimization task for the case of the semi-open impeller with straight blades, requires description of its' geometry by means of, at least, eighteen design variables. In the case of constant meridional cross-section, ... -
Investigations of Oil-Free Support Systems to Improve the Reliability of ORC Hermetic High-Speed Turbomachinery
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)The design of a small turbo-generator to produce electricity in the range from a few kWs requires the use of an aerostatic or aerodynamic gas bearing system. The theoretical analysis and the experimental test at the ... -
Modernization of a Nitrous Gas Turbine-Driven Turbocompressor
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)The modernization of a nitrous gas four-stage centrifugal compressor is presented. The assumptions for modernization, its methodology and the results of thermodynamical, flow and dynamical calculations have been discussed. ... -
Stability Analysis of a Plane, Rectangular, Boron-epoxy Laminated Plate Basing on Strength Properties Determined by Different Methods
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)This paper presents the examples of practical applications of composite materials in mechanical engineering and methods in determining of micromechanical properties of a laminate, corresponding to a plate, made of epoxy ... -
Perturbation Method in the Analysis of Manipulator Inertial Vibrations
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)An analysis of inertial component of mechanical vibrations induced during a motion of the MAR industrial manipulator is presented. The mathematical analysis of vibrations is based on the perturbation method. The presented ... -
Nonlinear normal modes of three degree of freedom mechanical oscillator
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)In this paper we show the method of calculation of nonlinear normal modes and its application to mechanical coupled systems. We present bifurcation diagram of nonlinear normal modes in three degree of freedom system. We ... -
Local Dynamic Buckling of C-Shape Profile Subjected to Bending
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)丝袜英文翻译丝袜英文翻译,丝袜600d丝袜600d,石川ff14石川ff14This paper deals with local dynamic buckling of thin-walled girder segments (short beam-columns) subjected to bending. Various shapes of pulse loading (triangle, trapezoid and rectangle) with a duration corresponding to ... -
Dynamice of Three Unidirectionally Coupled Duffing Oscillators
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)This article presents a system of three unidirectionally coupled Duffing oscillators. On the basic of numerical study we show the mechanism of translation from steady state to chaotic and hyperchaotic behavior. Additionally, ... -
Comparison of the Aluminium Versus Steel Telecommunication Towers in Stochastic Finite Element Method Eigenvibrations Analysis
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)The main aim of this paper is to make a comparison of the eigenfrequencies of the high telecommunication towers alternatively manufactured using the stainless steel and the aluminium components. It is provided each time ... -
Polishing of Hard Machining Semiconductor Materials Made of Silicon Carbide
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)In the paper the application of silicon carbide (SiC) in electronics especially for production of p-i-n diodes have been shown. Also the technology of honing process of samples made of silicon carbide using grinding, ... -
The Strength of a Cut-off Wheel Model Subjected to a Three Point Lateral Load Assessed by Different Methods
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)In the paper the results of an assessment of a cut-off wheel model subjected to threepoint loading with lateral forces in the form reduced stresses obtained by three methods: analytical, FEM and strain gauge ones have ... -
The Strength of Cut-off Wheel Model Subjected to a Single Point Lateral Load Assessed by Different Methods
(Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki ŁódzkiejLodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering, 2011)In the paper the estimation results of strength of a cut-off wheel model subjected to a single point lateral load in the form of a reduced stress obtained by three methods: analytical, FEM (finit~element method) and ... -
Zielone polimery
(Wydawnictwo Politechniki ŁódzkiejLodz University of Technology Press, 2020)Polski zespół badawczy pod kierunkiem dr hab. Anny Masek, prof. PŁ opatentował całkowicie zielone polimery, czyli takie, które składają się wyłącznie z produktów pochodzenia roślinnego. Roślinne słomki do napojów, ...