KŁ

Krystian Łygas

Lublin University of Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Piotr Wolszczak

Lublin University of Technology

Grzegorz Litak

Lublin University of Technology

Mateusz Paszko

Lublin University of Technology

P. Stączek

Lublin University of Technology

Agnieszka Malec

Lublin University of Technology

Piotr Muryjas

Lublin University of Technology

Szymon Molski

AGH University of Krakow

Tomasz Cholewa

Lublin University of Technology

Maciej Borkowski

Warsaw University of Life Sciences

Tomasz Klepka

Lublin University of Technology

Cooperative Institutions

Lublin University of Technology

ORCID

Institute of Computer Science

AGH University of Krakow

Wojewódzki Inspektorat Ochrony Środowiska w Warszawie

Chief Inspectorate of Environmental Protection

University of Economics and Innovation

Warsaw University of Technology

Leuphana University of Lüneburg

BLDE University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Algorytmy systemu wizyjnego stanowiska badawczego aplikacji pick and place

Krystian Łygas

Cite

Citations (0)

Energy harvesting from an oscillating vertical piezoelectric cantilever with clearance

De Gruyter eBooks (2018)

Krystian Łygas Piotr Wolszczak P. Stączek Grzegorz Litak

Vibration energy harvesting is proposed for a nonlinear electromechanical system. A mechanical resonator, which is realized as an inverted elastic pendulum excited by kinematic excitation, is characterized for a broad frequency band due to clearance and impact interactions. The moving frame induces pendulum beam deflection, and mechanical stress is converted into an electrical voltage by a piezoelectric patch. Finally, the output power is dissipated on the load resistor. The results of electric power and voltage outputs for various frequencies of kinematic excitations of the frame are shown. In the assumed working conditions, the system described transforms the input frame displacement frequency into the higher harmonics of beamdeflection.

Pendulum

Mechanical energy

10.1515/9783110445053-007

Cite

Citations (1)

Koncepcja stanowiska badawczego aplikacji pick and place

Krystian Łygas

Cite

Citations (0)

Broadband frequency response of a nonlinear resonator with clearance for energy harvesting

MATEC Web of Conferences (2018)

Krystian Łygas Piotr Wolszczak Grzegorz Litak

We examine the response of an inverted pendulum excited harmonically with amplitude limiters. Such a nonlinear resonator is suggested to work in the transduction of ambient vibration energy into the electrical power through bending of the moving beam. Using a multibody model we follow rotation and bending of the elastic beam and we provide the solutions of various frequencies. We found that the corresponding bending is the largest for subharmonic solutions of beam oscillations.

Pendulum

Flutter

10.1051/matecconf/201814812003

Cite

Citations (5)

On the Influence of Solar Radiation on Heat Delivered to Buildings for Heating

Energies (2021)

Tomasz Cholewa Agnieszka Malec A. Cholewa Andrzej Smolarz Piotr Muryjas

Nowadays, the attention of designers and service providers is especially focused on energy efficiency and integration of renewable energy sources (RES). However, the knowledge on smart devices and automated, easily applicable algorithms for optimizing heating consumption by effectively taking advantage of solar heat gains, while avoiding overheating, is limited. This paper presents a simple method for taking into account the influence of solar heat gains in the form of solar radiation for the purposes of forecasting or controlling thermal power for heating of buildings. On the basis of field research carried out for seven buildings (five residential buildings and two public buildings) during one heating season, it was noticed that it was justified to properly narrow down the input data range included in the building energy model calculations in order to obtain a higher accuracy of calculations. In order to minimize the impact of other external factors (in particular wind speed) affecting the heat consumption for heating purposes, it was recommended to consider the data range only at wind speeds below 3 m/s. On the other hand, in order to minimize the impact of internal factors (in particular the impact of users), it was suggested to further narrow down the scope of the input data to an hour (e.g., 10–14 in multi-family residential buildings). During these hours, the impact on users was minimized as most of them were outside the building.

Overheating (electricity)

10.3390/en14040851

Cite

Citations (4)

Kinematic Design of Parallel Delta System in Matlab

Applied Mechanics and Materials (2016)

Krystian Łygas Piotr Wolszczak Tomasz Klepka Daniel Ghiculescu

The paper presents the problem of modelling the parallel kinematic delta system using specialized software Simmechanics constituting the extension of the Matlab environment. Parameterized model of the parallel delta robot was developed and kinematic analysis was performed. The results of the model was used to correction of design and real construction. Designed robot is intended to direct a tool according to the program recorded by machine commands (G-code).

Code (set theory)

Machine tool

10.4028/www.scientific.net/amm.844.7

Cite

Citations (3)

Braking deceleration variability of progressive safety gears using statistical and wavelet analyses

Measurement (2017)

Paweł Lonkwic Krystian Łygas Piotr Wolszczak Szymon Molski Grzegorz Litak

Statistical Analysis

10.1016/j.measurement.2017.06.005

Cite

Citations (16)

MONITORING OF CUTTING CONDITIONS WITH THE EMPIRICAL MODE DECOMPOSITION

Advances in Science and Technology – Research Journal (2017)

Piotr Wolszczak Grzegorz Litak Krystian Łygas

In this paper, we apply empirical mode decomposition by Huang and Hilbert to transform signals recorded during a milling process.Vibroacoustic sensors recorded vibrations of a tool-workpiece system while milling with the end mill of a special shape of "Hi-Feed".The results of Huang-Hilbert analysis provide the information about amplitudes and frequencies of empirical modal components.Application of Huang-Hilbert transform to cutting conditions monitoring allows the separation of various vibration components caused by phenomena associated with the drive system and the machine components.Therefore, the analysis highlights vibrations caused by known sources of vibration, such as spindle speed, the number of teeth of the cutting tool or the frequency of vibration tools.Furthermore, signal components generated in the cutting zone were identified.The resulting information helps to assess the working conditions of cutting tools, selection of cutting parameters and tool wear monitoring.

Mode (computer interface)

10.12913/22998624/68467

Cite

Citations (20)

Współczesne metody modelowania przepływów turbulentnych w otoczeniu poruszającego się autobusu miejskiego

Mateusz Paszko Krystian Łygas

Cite

Citations (1)

Construction of neural nets in brain-computer interface for robot arm steering

Małgorzata Plechawska–Wójcik Piotr Wolszczak R. Cechowicz Krystian Łygas

The paper presents an attempt to construct a direct brain-to-machine interface (BCI) that could be used to control movements of a robotic arm. A series of experiments was performed to collect data from subjects, train and validate an effective neural network and search for a generalized solution. The ERD/ERS imagery paradigm was chosen to extract valid data from the EEG signal. Since categorizing between two opposite states (like Left-Right) proved to be the most reliable, a control structure containing multiple neural networks was proposed. New research concerns the method of development and the use of neural networks classifiers. An automated procedure was used to select the best bipolar classifiers from the set of machine-generated neural networks. The chosen classifiers were used in a hierarchical structure responsible for signal interpretation. Adoption of this method was motivated mainly by the complexity of arm movement. The movement consisted of several phases, such as the initiation, continuation, change of direction, change of speed. It was observed that simple bipolar classifiers produced better output than classifiers designed to recognize complex decisions.

Interface (matter)

10.1109/hsi.2016.7529656

Cite

Citations (7)