Karolis Jasas

Mr. Karolis Jasas

Department of Transport Engineering, Kaunas University of Technology, Kaunas, Kauno Miestas, Lithuania
orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 April 2023 in Shock and Vibration
Verified
Journal Article
Open access
PDF file
AFAlgimantas Fedaravičius
Algimantas Fedaravičius
KJKarolis Jasas
Karolis Jasas
RGRimvydas Gaidys
Rimvydas Gaidys
KPKestutis Pilkauskas
Kestutis Pilkauskas
In this article, the results of research of dynamical processes during the first stage of a missile launch from very short-range mobile firing unit (MFU) are presented. The determined laws of motion of the system’s components enabled determining characteristic motions that need to be reconstructed by the launcher simulator intended to be developed for personnel training. The half-car approach is applied for modelling the unit which consists of a vehicle and is attached to its missile launcher. The combined system is represented by a lumped-parameter model. The mathematical model is derived by applying the principle of Lagrange differential equations. Motion laws of the components of the system as its response to excitation load generated during missile launch were determined.

17 February 2022 in Mechanics
Verified
Journal Article
Closed access
PDF file
AFAlgimantas Fedaravičius
Algimantas Fedaravičius
KJKarolis Jasas
Karolis Jasas
ESEgidijus Sližys
Egidijus Sližys
ASArvydas Survila
Arvydas Survila
Armament systems such as guns, launchers simulators are effective tools for training armed forces personnel. A firearm is a complex biomechanical system, so the best quality of training is achieved when training in a simulator, repeating the dynamic processes of the weapon by simulating the perception of real weapon use (feeling). The paper investigates the dynamic and stability properties of the short-range air defense system RBS-70. The RBS-70 short-range air defense system is designed to combat low-flying air targets. The purpose of this paper is to present the physical and mathematical models with com numerical dynamic simulation of the launcher in the first phase of missile flight. The theoretical model was formulated in the vertical plane and verified by the numerical modeling simulation.

7 September 2023 in Elektronika ir Elektrotechnika
Verified
Journal Article
Open access
PDF file
AFAlgimantas Fedaravicius
Algimantas Fedaravicius
KJKarolis Jasas
Karolis Jasas
ASArvydas Survila
Arvydas Survila
VGVitas Grimaila
Vitas Grimaila
In this article, the engineering concept of the laser-guided very short range air defence system field simulator, its structure, and practical use are presented. The possibilities and advantages of the practical use of the equipment developed in tactical exercises and individual training of air defence specialists are shown. The field simulator equipment without invasion and compromising functionality into the combat air defence system has been connected and installed. The simulator performs all required shooting procedures without using combat missiles, target detection, shot execution, and maintaining the target in the sighting lens until its destruction. The field simulator reduces training process expenses and increases its efficiency. In the article, the ground control and onboard control units are presented. The units consist of target detection and its positioning, coordinate defining and data transmission (global positioning system (GPS), personal computer (PC), radio frequency (RF) transceiver), pyrotechnic charge for missile launch simulation, and target destruction devices (e.g., smoke generator), whose operating principles, functional capabilities, and work reliability are ensured on the basis of conducted research. The field simulator, which was created based on synthesising the simulator systems studied, has proven itself in practise.

31 March 2023 in Problems of Mechatronics Armament Aviation Safety Engineering
Verified
Journal Article
Closed access
RBRimantas Barauskas
Rimantas Barauskas
AFAlgimantas Fedaravičius
Algimantas Fedaravičius
KJKarolis Jasas
Karolis Jasas
This article provides structural model analysis of characteristics of the vehicle movement during the shooting from a laser guided short-range air defence system mounted on it. Every shot causes a recoil, which significantly affects vibration of the vehicle and determines the shortest time duration between each two successive shots. The numerical simulation with MATLAB software enabled us verification of the created structural model and it facilitated the understanding of mechanical phenomena which are the most important for achieving the proper vibrational characteristics of the system. Main modes of the system movements during missile launch and their effect on the launcher and the vehicle were determined.