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On sliding mode control ofhydraulic servo systems and a manipulator
Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (2002)The aim of the study is to developa novel robust controller based on sliding mode control technique for the hydraulic servo system with flexible load and for a flexible manipulator with the lift and jib hydraulic actuators. ... -
On state and parameter estimation in chaotic systems
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 22.11.2013)State-of-the-art predictions of atmospheric states rely on large-scale numerical models of chaotic systems. This dissertation studies numerical methods for state and parameter estimation in such systems. The motivation ... -
On the Analysis and Control of a Linear Synchronous Servomotor with a Flexible Load
Acta Universitatis Lappeenrantaensis (08.12.2006)Industry's growing need for higher productivity is placing new demands on mechanisms connected with electrical motors, because these can easily lead to vibration problems due to fast dynamics. Furthermore, the nonlinear ... -
On the Application of Beam on Elastic Foundation Theory to the Analysis of Stiffened Plate Strips
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 08.10.1999)The main objective of this thesis is to show that plate strips subjected to transverse line loads can be analysed by using the beam on elastic foundation (BEF) approach. It is shown that the elastic behaviour of both the ... -
On the Condition Monitoring of Induction machines
Acta Universitatis LappeenrantaensisURN:ISSN:1456-4491 (03.12.2003)The research of condition monitoring of electric motors has been wide for several decades. The research and development at universities and in industry has provided means for the predictive condition monitoring. Many ... -
On the development of object functions and restrictions for shapes made with a turret punch press
Acta Universitatis Lappeenrantaensis (Lappeenranra University of Technology, 17.12.2010)This study presents the information required to describe the machine and device resources in the turret punch press environment which are needed for the development of the analysing method for automated production. The ... -
On the differential evolution algorithm and its appliation to training radial basis function networks
URN:ISSN:1456-4491Acta Universitatis Lappeenrantaensis (2006)The parameter setting of a differential evolution algorithm must meet several requirements: efficiency, effectiveness, and reliability. Problems vary. The solution of a particular problem can be represented in different ... -
On the dynamic simulation of coupled multibody and hydraulic systems for real-time applications
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 29.11.2019)The computer simulation of mechanical systems enables engineers to perform fast prototyping and in-depth system analysis even before a single physical model has been built. However, since mechanical systems are often ... -
On the effects of welding parameters on weld quality of plasma arc keyhole welding of structural steels
Tieteellisiä julkaisuja - Research papers (Lappeenranta University of Technology, 08.12.1989)The possibility and the usefulness of applying plasma keyhole welding to structural steels with different compositions and material thicknesses, and in various welding positions has been examinated. Single pass butt welding ... -
On the Reversed Brayton Cycle with High Speed Machinery
LTKK Tieteellisiä julkaisuja - Research papersURN:ISSN:0356-8210 (1996)This work was carried out in the laboratory of Fluid Dynamics, at Lappeenranta University of Technology during the years 1991-1996. The research was a part of larger high speed technology development research. First, there ... -
On the Role of Enterprise Architecture in Enterprise Integration
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 27.04.2018)In the current business era, it is crucial for an organization to understand the rapidly changing environment of today. To swiftly respond to the changing environment, an organization must provide enterprise integration ... -
On Value Creation at an Industrial Intersection – Bioenergy in the Forest and Energy Sectors
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 2009)The traditional forest industry is a good example of the changing nature of the competitive environment in many industries. Faced with drastic challenges forestindustry companies are forced to search for new value-creating ... -
On weldability of thick section austenitic stainless steel using laser processes
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 25.10.2019)Laser welding and its different process variations using filler metal addition have increasingly become the preferred joining technology of the metal structure fabrication industry. The essential characteristics of laser ... -
Online Time and Frequency Domain Identification of a Resonating Mechanical System in Electric Drives
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 07.10.2016)In modern machinery, the dynamic performance of electric drives is often limited by the mechanical characteristics of the system such as flexibilities. With the growing demand for high-performance machinery, there is an ... -
Online Ultrasound Measurements of Membrane Compaction
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 17.12.2010)There are several filtration applications in the pulp and paper industry where the capacity and cost-effectiveness of processes are of importance. Ultrafiltration is used to clean process water. Ultrafiltration is a membrane ... -
Open data in distribution network asset management
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 03.11.2023)Climate change and the energy transition are causing major changes to the distribution network environment. The electrification of society raises expectations for clean, reliable, and affordable electricity supply. Meeting ... -
Operational level performance measurement in university-industry collaboration
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 12.12.2019)Even though the third mission and entrepreneurial activities of universities are continuously growing issues within higher education and society as a whole, and even though different measures are currently used to evaluate ... -
Operative business development through system model and changing business structures
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 24.11.2023)Global markets and related operational activities create ever-changing challenges. The fluctuations of the global economy, in addition to customer demands, introduce dynamic challenges that a company should be able to ... -
Oppisopimuskoulutus yritysten tuottamana koulutuspalveluna: tavoitteista vaikutuksiin
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 04.05.2016)Työpaikoilla tapahtuvan koulutuksen merkitys korostuu yhteiskunnassa kaikilla tasoilla nyt ja tulevaisuudessa. Tämä väitöstutkimus määrittelee oppisopimuskoulutuksen yritysten tuottamana koulutuspalveluna osana ammatillista ... -
Opportunities of households to contribute to primary frequency regulation in power systems : Proof of concepts
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 12.04.2024)Our energy systems are undergoing a tremendous change. The increasing amount of inverter-connected production and consumption-side assets challenges the frequency stability in power systems. New solutions for balancing ...
