A5090518099- Vehicle Dynamics and Control Systems
- Hydraulic and Pneumatic Systems
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Vibration Control and Rheological Fluids
- Atomic and Subatomic Physics Research
- Dynamics and Control of Mechanical Systems
- Engine and Fuel Emissions
- Soil Mechanics and Vehicle Dynamics
- Mechanical Engineering Research and Applications
- Technical Engine Diagnostics and Monitoring
- Magnetic Bearings and Levitation Dynamics
- Control Systems in Engineering
- Mining and Industrial Processes
- Mechanical Engineering and Vibrations Research
- Silicone and Siloxane Chemistry
- Mechanical and Thermal Properties Analysis
- Gas Sensing Nanomaterials and Sensors
- Radiation Therapy and Dosimetry
- Simulation and Modeling Applications
- Surface Roughness and Optical Measurements
- Advancements in Materials Engineering
- Robotics and Sensor-Based Localization
- Ocular Oncology and Treatments
- Nuclear Physics and Applications
AGH University of Krakow
2012-2024
Jagiellonian University
2003-2024
Vanderbilt University Medical Center
2024
Institute of Physics
2013
Électricité de France (France)
1977-1979
Laboratory investigations of an active vehicle suspension in-series structure the slow-active type are presented in this paper. The multidimensional model is reduced to a case representing quarter car suspension. Control laws for vibration reduction systems usually determined based upon linear models objects. Active suspensions characterised by nonlinearity, connected most often with actuating and their energetic restrictions. This causes divergences between theoretical quality factors those...
J-PET analysis framework is a exible, lightweight, ROOT-based software package which provides the tools to develop reconstruction and calibration procedures for PET tomography.In this article we present implementation of full data-processing chain in used data tomography scanner.The incorporates automated handling setup parameters' database as well high level building procedures.Each these components briey discussed.
This paper is focused on the problem of active suspensions wheeled vehicles with electro-hydraulic actuators. Two dynamic structures first actuator connected spring in series and second parallel – called slow full respectively were considered. The considerations described concern physical quarter-vehicle models suspensions. These constructed installed a rig for tests structures. A laboratory enables simulation real conditions by disturbing investigated suspension kinematic excitation....
Studies of systems with energy regeneration have been carried out for years, because they primarily cover the assemblies electrodynamic actuators. This paper addresses issue active reduction mechanical vibration using an electrohydraulic actuator. The testing procedure aims to assess potential use those in a different frequency band and force range than explains operating principle system, findings laboratory tests are presented. tested reducing system is physical model 2 degree-of-freedom...
Novel Positron Emission Tomography system, based on plastic scintillators, is developed by the J-PET collaboration. In order to optimize geometrical configuration of built device, advanced computer simulations are performed. Detailed study presented background given accidental coincidences and multiple scattering gamma quanta.
Use of springs made an alloy with shape memory (SMA) to the dynamic characteristics a resonance vibration screen is proposed in this paper. These change spring constant as result temperature changes. Thus it possible their frequency real time. In paper mathematical model controlled SMA was formulated and its parameters were identified. both effect coefficient changes damping depending upon taken into consideration. Experimental investigations examined physical carried out selected also...
The paper summarizes the methods of a tracked vehicles model construction in MSC.ADAMS program. Advantages and faults these are described here. Finally, authors describe one chosen method with exact elements geometry real suspension parts. Basis on this method, vehicle is described. Parts parameterized can be fluently changed usage dedicated user interface. Next, part simulation results presented.
In the article, authors present an advanced model of hyperbolic torsion spring based on Finite Element Method (FEM). This takes into account contact forces between arms, which allows you to simulate its operation even in case a large twisting angle. On basis this FEM model, stiffness characteristics were constructed. Based characteristics, existing 2S1 track platform has been rebuilt. much higher mass body is allowed than original model. elastic parameters such as static deflection...
For the first time a molecule of 2-(4-styrylphenyl)benzoxazole containing benzoxazole and stilbene groups is applied as scintillator dopant acting wavelength shifter. In this article light yield plastic scintillator, prepared from styrene doped with 2 wt% 2,5-diphenylbenzoxazole 0.03 2-(4-styrylphenyl)benzoxazole, determined to be large 60% $\pm$ 2% anthracene output. There potential improve value in future by optimization additives concentrations.
In this article we present a novel method of hit time and position reconstruction in long scintillator detectors. We take advantage the fact that for kind detectors amplitude shape registered signals depends strongly on where particle detector. The is based determination degree similarity between measured averaged stored library set well-defined positions along scintillator. Preliminary results validation introduced with experimental data obtained by means double strip prototype J-PET...
The article discusses usage of an innovative three-dimensional vision system in a quality control process for surface defect detection. A method 3D image building and selecting cross section profile on images is presented. problems connected with the resolution system, laser beam analysis, application successive height profiles sample cast planes. On basis model, measurements allowing assessment dimension parameters defects given are tests analyses such range checks which possible to conduct...
The conventional synthetic aperture focusing technique (SAFT) can improve the lateral resolution and increase signal-to-noise ratio (SNR) in ultrasonic imaging. However, use of SAFT immersed inspection is limited due to issues related refraction effects at boundary between water a solid object. virtual transducer (VT) method employing focused or phased array proposed as solution this problem. In VT method, focal point used source waves. If placed on below surface an inspected object, be...
The paper presents an active vibration control system based on low dynamic stiness of suspension.Using a simple two degrees-of-freedom few basic concepts lowering suspension are presented.Through reducing the component force between protected subsystem and remaining part system, considerable suppression is achieved.Linear nonlinear algorithms proposed.In case algorithm, sucient link necessary to change position maintained.Experiments described in cover dierent cases.In rst case, operated as...
We present a fast GPU implementation of the image reconstruction routine, for novel two strip PET detector that relies solely on time flight measurements.
The article contains results of a conceptual work and research which develops semi-active suspension the 2S1 caterpillar platform. are collected on designed built test stands used in three alternative models platform system. first one is based existing construction other two have been modernized by using new solutions tracked vehicles technology associated with torsional spring element. authors assumed simulation conditions for straight line driving while model overcomes an obstacle track....
Control of vibration is a significant problem in the design and construction vehicle suspensions. The usage controlled suspensions important due to ride comfort, driving safety, road holding. control law for such systems usually determined as solution an optimisation with quality indicator. effectiveness reduction possible be improved entire useful frequency range system operation, but increasing external energy consumption observed. An additional case includes necessity increased at...