Search Results - "Linjama, Matti"

Analyzing the design and performance of a high flow rate digital flow control unit: Structural insights and simulation findings by Elsaed, Essam, Linjama, Matti

“…Digital hydraulics offers advantages over traditional proportional valves but lacks high flow rate performance. This study proposes a solution based on…”
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Representation Learning for Detecting the Faults in a Wind Turbine Hydraulic Pitch System Using Deep Learning by Korkos, Panagiotis, Kleemola, Jaakko, Linjama, Matti, Lehtovaara, Arto

“…Wind turbine operators usually use data from a Supervisory Control and Data Acquisition system to monitor their conditions, but it is challenging to make…”
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Evaluating the performance of machine learning CFD-based and hybrid analytical models for transient flow prediction in temperature-compensated digital flow units by Elsaed, Essam, Linjama, Matti

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Dynamic Response Analysis of the Main Plunger in A Two-stage On/Off Poppet Valve for the Digital Hydraulics Field by Elsaed, Essam, Linjama, Matti

“…The necessity for greater energy conservation in hydraulic machinery is highlighted by escalating fuel costs and heightened ecological awareness. Utilizing…”
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A Review of Pilot-operated Hydraulic Valves – Development, Challenges, and a Comparative Study by Elsaed, Essam, Linjama, Matti

“…Hydraulic systems have been widely used due to their high power-to-weight ratio. Despite the growing instances of being superseded by the electromechanical…”
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Variable speed drive with hydraulic boost by Linjama, Matti

“…This paper studies a variable speed drive with two hydraulic pump motors connected to an actuator. The torque load of the pump motors is reduced by connecting…”
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Data annotation and feature extraction in fault detection in a wind turbine hydraulic pitch system by Korkos, Panagiotis, Linjama, Matti, Kleemola, Jaakko, Lehtovaara, Arto

“…The performance of wind turbines can be improved by processing supervisory control and data acquisition (SCADA) data. SCADA data can be processed in a…”
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A Novel Equivalent Continuous Metering Control With a Uniform Switching Strategy for Digital Valve System by Wang, Pei, Cheng, Yuwang, Linjama, Matti, Yao, Jing, Shan, Dongsheng

“…Pulse number modulation (PNM) combined with pulse width modulation (PWM) control is an effective solution to improve the resolution of digital valve systems…”
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Displacement control of a mobile crane using a digital hydraulic power management system by Heikkilä, Mikko, Linjama, Matti

“…•New concept for a displacement controlled mobile crane is presented.•Control principle of a digital hydraulic power management system is proposed.•Possibility…”
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Open-loop Independent Metering Control of a Multi-DOF Forwarder Boom by Huova, Mikko, Tammisto, Jyrki, Linjama, Matti

“…This study applies independent metering control in a forestry forwarder in order to improve its energy efficiency. The paper describes the control method,…”
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Model-based force and position tracking control of an asymmetric cylinder with a digital hydraulic valve by Linjama, Matti, Huova, Mikko, Huhtala, Kalevi

“…This paper presents a model-based control solution for large inertia systems controlled by a fast digital hydraulic valve. The solution is based on model-based…”
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Digital valve system for ITER remote handling – Design and prototype testing by Siivonen, Lauri, Paloniitty, Miika, Linjama, Matti, Sairiala, Harri, Esqué, Salvador

“…[Display omitted] ITER-RH system is used to exchange the divertor’s 54 cassette assemblies in the vessel. Water hydraulics and servo valves are currently used…”
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Digital Hydraulic Technology for Linear Actuation: A State of the Art Review by Donkov, Viktor Hristov, Andersen, Torben, Linjama, Matti, Ebbesen, Morten

“…This paper analyses the current state of the art in linear actuation with digital hydraulics. Based on the differences in their aims the paper partitions the…”
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Digital hydraulic multi-pressure actuator - the concept, simulation study and first experimental results by Huova, Mikko, Aalto, Arttu, Linjama, Matti, Huhtala, Kalevi, Lantela, Tapio, Pietola, Matti

“…The decentralisation of hydraulic systems is a recent trend in industrial hydraulics. Speed variable drive is one concept where an actuator is driven by an…”
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Suitability of laminated steel-copper structure for high-pressure hydraulic manifolds by Siivonen, Lauri, Paloniitty, Miika, Linjama, Matti, Hynnä, Antti, Launis, Sirpa

“…Vacuum brazed steel-copper laminate could be used in high-pressure hydraulic manifolds in order to reduce size, weight and allow use of complex designs. The…”
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Analysis by Simulation of Different Control Algorithms of A Digital Hydraulic Two-Actuator System by Karvonen, Matti, Heikkilä, Mikko, Huova, Mikko, Linjama, Matti

“…Many hydraulic systems have losses, which could be avoided with new technology. Because component efficiency can be optimized to a certain operation point,…”
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Improved Digital Hydraulic Tracking Control of Water Hydraulic Cylinder Drive by Linjama, Matti, Vilenius, Matti

“…A position tracking control system is implemented by utilizing parallel-connected on/off valve series. The pulse code modulation method is used to achieve…”
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Special Issue on Digital Hydraulics by Ivantysynova, Monika, Scheidl, Rudolf, Linjama, Matti

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Energy Efficiency of Three-Chamber Cylinder with Digital Valve System by Huova, Mikko, Laamanen, Arto, Linjama, Matti

“…Commonly used hydraulic cylinders have a piston and a piston rod. The piston divides the inside of the cylinder in two chambers and pressures which affect how…”
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Jammed on/off Valve Fault Compensation with Distributed Digital Valve System by Siivonen, Lauri, Linjama, Matti, Huova, Mikko, Vilenius, Matti

“…The digital valve system is an on/off valve based directional flow control valve capable of accurate control of hydraulic actuators. The presented system has…”
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