Florin Ionescu

Steinbeis University Berlin | SHB · Steinbeis Transfer Institut Dynamic Systems

This paper addresses the problem of fault diagnosis performed on a mechanical system, based on acquired vibrations from bearings. In this aim, an optimization algorithm resulted by the alliance between a time frequency-scale Signal Processing method (the Matching Pursuit) – and an Evolutionary Computing technique (mainly, a Genetic Algorithm) is in...

In contemporary medical practice, there is a growing interest in traditional oriental methods of reflexodiagnostics and reflexotherapy based upon teaching about the meridian energy balance of the body. In the present paper, new mathematical models are offered, which reflect the interaction between internal organs and biologically active points (BAP...

Longue term science dissemination and economic growth offer a balance between accumulation and distribution for a sustained development and stability. A must of 21st century because the digital approach is faster and far reaching as the last technical revolution [47]. How is born and are looking now Prosperity and Disparity of Capital of 21st Centu...

A great number of reflexologies use ancient concepts which do not coincide with the modern medical terminology of anatomy, physiology and biophysics. This substantially reduces the trust of physicians in this direction of their profession. During the research, several mathematical models of the internal and biological active points of meridian stru...

A biotech measurement software for determining the emotional tension of humans is developped by means of PET tests, by associating electric characteristics of biologic active points in connection with PE Sphere and the indicators characterising the states of the subjects` visual attention.Three "dimensions" of the spheer are considered, whyle each...

The paper presents the principle, the own achievements and the future prospects within the concepts of the Object Oriented Virtual Manufacturing Lines, where parallel, Virtual Mathematical and Visual Images (of them) are (to be) developed for the REAL ones. In this context the Main Object is the Module and the last one (the deepest one) is the Math...

In the paper, we introduce "Fuzzy Voronoi" (FV) diagrams (FVD) for fuzzy numbers (FN) of dimension two (FNDT) by extention of crisp Voronoi diagrams to FN. The FV sites are defined as FNDT. All operations are defined ind FNDT framework. We propose an analytical approach to compute the boundaries of FVD for a pyramidal - shape of FNDT

Abstract We propose a biotech measurement scheme and software based on new features for the diagnosis of backbone osteochondrosis. Together with the traditional methods of diagnosis, the energy characteristics of biologically active points (acupuncture points, or APs) are used. This new software is based on mathematical models of the internal and b...

For many diseases, new methods and models for their prediction, diagnosis and analysis are sought. We apply mathematical models for the interaction of the internal and biologically active points of meridian structures and can thereby specify diseases for which reflex diagnostics and reflex therapy methods are the most effective; amongst these are d...

Determination of psycho-emotional tension on humans is performed by means of psychological tests, the electrical characteristics of biologically active points connected with the psycho-emotional sphere, and on indicators characterizing the state of a subject's visual attention. The level of such tension is determined as an aggregate of these three...

Many theories of reflexology use ancient concepts which do not coincide with the modern medical terminology of anatomy, physiology and biophysics. This substantially reduces the trust of physicians in reflexology methods. During this research, several mathematical models for the interaction of the internal and biological active points of meridian s...

Many theories of reflexology use ancient concepts which do not coincide with the modern medical terminology of anatomy, physiology and biophysics. This substantially reduces the trust of physicians in reflexology methods. During this research, several mathematical models for the interaction of the internal and biological active points of meridian s...

A complete mathematical model of SCARA robot was developed and presented in this paper including servomotor dynamics and dynamics simulation. The equations of motion were derived by using Lagrangian mechanics. Direct current (DC) servomotor driving each robot joint was studied and modelled. SCARA robot was constructed to achieve drilling operation...

Methods for the selection of candidates for work as an operator of man-machine systems (MMS) are analysed. Vector estimates of candidates' intelligence, containing static and dynamic components defining candidates' problem-solving abilities under uncertainty conditions and for self-learning are proposed. The properties of the proposed estimates are...

In this paper, a 5-axis articulated robot for a drilling task was designed entirely from scratch with SolidDynamics (SD) software. Kinematics (forward and inverse) of the designed robot was modeled. Using this model, the process of simulation was successfully carried out for the drilling task in the work space of the robot. Results were validated b...

The present paper is a short review of some of the concepts, procedures and achieved results, oriented toward the modeling of complex, large installations, known under the name of HYPAS. Physical phenomena involved in hydraulic, pneumatic, mechanic and electric systems are depicted by mathematical models (MM) with static and dynamic nonlinearities...

In this paper we propose a recurrent neuro-fuzzy network (RFNN) based on Takagi-Sugeno inference with feedback inside the RFNN for nonlinear identification in mechatronic systems. The parameter optimization of the RFNN is achieved using a differential evolutionary algorithm. The experimental results are analyzed using a study cases modeled in Simul...

The present paper is a short review of some of the concepts, procedures and achieved results, oriented toward the modeling of complex, large installations, known under the name of HYPAS. Physical phenomena involved in hydraulic, pneumatic, mechanic and electric systems are depicted by mathematical models (MM) with static and dynamic nonlinearities...

To each of most usual static nonlinearitie, as: dead zones, spring in origin, viscuous and dry friction, hysteresis, double slope(s), etc. description functios were created and tested to be implemented on HYPAS, an open plattform for object oriented automatic generation of mathematic modells, simualtion and optimization of hybrid drive and controll...

A great number of reflexologies use ancient concepts that do not coincide with modern medical terminology of anatomy, physiology, and biophysics, substantially reducing the trust of today's physicians in this direction of their profession. Recently, several mathematical models of internal and biological active points of meridian structures interact...

The concept of Mathematical Modell of a Process or a Natural Phenomenon is building the Miles Stone of the Automatic Control. The purpose of it was born by the needs to simulate a known process, to understand the evolution's lows of natural process, to predict a possible evolution of a process under changed conditions (like those of structure's cha...

The paper presents some Computer Assisted Engineering (CAE) aspects concerning the achievement of a hybrid actuated micro-nano robot. Starting from a unitary concept Control - Design, different kinematic solutions were developed and compared, before a decision upon the structure was selected. Multiple closed loop simulations were performed via MATL...

As result of a critical analysis of some crises and disaster management systems models from the classical and recent literature, according to different criteria such as: applicability, advantages, limitations, cost, time, geographical area, this paper aims to offer suggestions of how to implement intelligent systems for crisis and disaster manageme...

This work presents some aspects related to optimizing the curriculum for higher education, industrial engineering domain. The optimization was seen in this case from the perspective of the need to change or not to change it. Thus, a mathematical model was realized, based on the methods of fuzzy logic, which allows the analysis of the stability of t...

This work presents a mathematical model that allows the determining, based on empirical input data, of a strict mathematical dependency between the percentages corresponding to the groups of subjects that compose the curriculum of the study programme “Mechatronics”. A first step in realizing the model was the selection of the significant groups of...

This work presents some aspects related to optimizing the curriculum for higher education, industrial engineering domain. The optimization was seen in this case from the perspective of the need to change or not to change it. Thus, a mathematical model was realized, based on the methods of fuzzy logic, which allows the analysis of the stability of t...

The paper presents some achievements in the field of Mechatronics, where large scale modelling and simulation (MS) have been involved and have shown, that they represent unavoidable tools for a high Quality/Price-Rate of research and development (R & D). It also produces a high positive gradient of evolution in education. Some information concernin...

Some Methods for the selection of candidates as operators of man-machinesystems are analyzed. A mean vector estimates the group intelligence and defines defines the group's collective ability for decision making in order to obtain an unified solution of a given task, to keep a correct and original solutionand to estimate the solution quality and it...

The paper presents some achievements in complex modelling and simulation in mechatronics, being underlined some characteristics of the mechatronics field together with applications of the mecha-tronics design principles. Some aspects of the optimized and integrated design having as main part the modelling and simulation of the system are presented....

Simulation of robot systems which is getting very popular, especially with the lowering cost of computers, can be used for layout evaluation, feasibility studies, presentations with animation and off-line programming [1]. In this research, a complete mathematical model of SCARA robot was developed including servomotor dynamics and presented togethe...

The book encompases the basics of linear systems - besed of linear mathematic models, between inout and output - and is focused on the principles of automatic control systems and on their methodical interpretation of behaviour and of achieved results.. It is based on the unique definition an procedural frame work to stimulate the reader to master a...

Osteochondrosis of the lumbar region of a backbone became the most part among the beurologic illnesses. To improve the quality of prediction and diagnose leads to the same improvement health services' quality. It allows to make rational treatment and prophilactic schemes. For the analysis of a multi dimensional data set, the instruments of the fuzz...

The paten is for robot for micro and nano manipulation with application for cell operations

spectrală a stîrnit un mare interes în industrie. Fault diagnosis is a domain that has reached its maturity within the last decade. The success of monitoring aiming to detect flaws during the functioning of some system tremendously depends on the signals which are encoding the information about possible defects. Such a signal is, for example, the v...

The aim of the paper was to improve that orthogonal wavelets of Daubechies class can be employed in applications of data forecasting, as well as classical ARMA models, but with superior accuracy. Both the ARMA model and the Wavelet Transform were adaptively selected, with respect to prediction quality criterion. Simulations on real time series reve...

FORWAVER is a simulator that provides high accuracy time series forecasting with the help of wavelet-based models. Within this paper, the models rely on signal bases consisting of Daubechies orthogonal wavelet packets and ARMA modeling. Such a basis is adaptively selected, depending on data, while the ARMA model is obtained by maximizing a cost fun...

The challenge in the development of ultraprecise manipulating systems is to combine the unique features of piezoactuators with appropriate mechanics and sensor/ control electronics in order to achieve the requirements of the micro and nano worlds. The RoTeMiNa robotic system utilizes a teleoperated control approach with impedance scaling and was de...

Vibrations, especially generated by mechanical systems, exhibit a fortunate and extremely useful feature in fault diagnosis: encoding information about the health state of the system that produced them. In order to decode that information, the main properties of vibration yielding identification and isolation of faults have to a priori be known. Th...

The paper presents some achievements in complex modelling and simulation in mechatronics, being underlined some characteristics of the mechatronic field together with applications of design principles. Some aspects of the optimized and integrated design having as main part the modelling and simulation of the system are presented. The facilities of...

The invention relates to the aircraft designing and may be used in the aircraft control and braking systems. The aircraft-control gear includes two turntable sections (1) and (2), installed onto the backside of the wing, which are set in rotation by drive mechanisms with gearwheels. The turntable sections (1) and (2) are mounted onto a common axis...

The modelling of the human moving system and its simulation are subject of more intensive studies, due mostly to the development of the computer techniques and the appropriate software. Most fields of application are located in the reconstruction of the mechanics of human movements, to the drive, transmission and control systems. The desire, an uni...

Comparing to signals such as speech or seismic, the vibration generated by oscillations of a mechanical system in exploitation is quite regular. At a glance, good models of vibration can be designed, without special precautions. However, some basic characteristics of this signal should be considered when constructing the model. For example, vibrati...

The invention relates to processes for manufacturing microstructures of metallic and nonmetallic materials by explosion. The process for manufacturing microstructures by explosion is realized in the following way: onto a support (1) there is installed a set of sheets (2) and (3) (metallic or nonmetallic), between which there are placed microgroove...

The invention relates to processes for working of microstructures of metals, alloys and nonmetals by means of electroerosion and ultrasound. The process for manufacturing microstructures of metals or alloys by means of electroerosion machining is carried out with the help of a tool electrode (1) of cylindrical form, in the following way: the tool e...

The invention relates to processes for working of microstructures of metals, alloys and nonmetals by means of electroerosion and ultrasound. The process for manufacturing microstructures of metals or alloys by means of electroerosion machining is carried out with the help of a tool electrode (1) of cylindrical form, in the following way: the tool e...

In this paper is presented a developed robotic system for cell micro/nano manipulation and penetration, based on the visual/haptic interface. The operator's motion and manipulations skills are transferred to the robot control system by direct teleoperation. The robot's regional structure has three translational joints and one passive rotational joi...

When searching for faults threatening a system, the human expert is sometimes performing an amazingly accurate analysis of available information, frequently by using only elementary statistics. Such reasoning is referred to as “fuzzy reasoning,” in the sense that the expert is able to extract and analyse the essential information of interest from a...

The paper presents the modeling and simulation of precessional drives designed in two variants capable of high transmission ratio and torque for one stage compact construction. The constructions were designed in Inventor and also as multi body systems in MotionInventor. The simulations of the drives provide information concerning positions, velocit...

Signals encoding information of the existing defects or possible failures in a system are sometimes difficult to analyze because of various corrupting noises. Such signals are usually acquired in difficult conditions, far from the place where defects are located and/or within a noisy environment. Detecting and diagnosing the defects require then qu...

The invention relates to the hydraulic power engineering, namely to the sea wave power conversion to electric power. The installation, according to the first variant, contains a tangent structure 10, a floating body 1, joined with it by fixation elements 4 and 5, which are joined by means of a gearing 9 with a step-up gear 11 and an electric genera...

In this paper is presented a developed robotic system for cell micro/nano manipulation and penetration, based on the visual/haptic interface. The operator’s motion and manipulations skills are transferred to the robot control system by direct teleoperation. The robot’s regional structure has three translational joints and one passive rotational joi...

The chapter presents linear systems (LS) with multiple input and output (MIMO) and is introducing to the purpose of solutions' achievement agebraic and geometric investigation tolls. The presentation introduces the main theoretical backgrounds and the structural properties of LS: controlability, observability, decomposition, allocability stability...

The subject of this paper is a robot RoTe MiNa with 7 degrees of freedom (DOF) designed to perform special operations in micro and submicron range such as assembly and handling of micro objects in cm-working space. Another application foreseen for this robot is pattering of polymer surfaces with monomolecular wolfram needle point, which is the aim...

Together with the theoretical framework presented in 1.Volume: Robots Modelling and Simulation (RMS) | Theodor Borangiu & Florin Ionescu, 2002, ISBN Edit AGIR: 973-8130-87-5 & Edit: Academiei Române: 973-27-0927-8 the presented solutions are giving the reader a nearly complete immage regarding the RMS. It is intended to all readers (Pre- & Post-PhD...

The chapter introduces a novel approach regarding denoising and compression of measured data by using a finite dictionary comprising time shifted, scaled amd harmonically modulated waveforms. The dictionary can be exploited through a Matching Pursuit Algorithm in alliance with a Genetic Algorithm, succintly described. The compaction of signal (cons...

Robots and manipulators for micro and nano manipulations in multitude of areas require specially designed joints that provide zero backlashes, superior precision and long life operation. The authors describe and explore a 2 degree of freedom (DOF) elastic no-backlash joint with desired stiffness for various dynamic applications. Numerical simulatio...

This paper addresses the problem of automatic drawing for natural boundaries that result by projecting the specific workspace of a robot on a plane, starting from its Denavit-Hartenberg parameters. The solution is approached by considering that the boundaries are generated by a planar manipulator with the same number of links as the robot. A genera...

Signals that carry information regarding the existing defects or possible failures of a system are sometimes difficult to analyze because of various corrupting noises. Such signals are usually acquired in difficult conditions, far from the place where defects are located and/or within a noisy environment. Detecting and diagnosing the defects requir...

The chapter presents two methods and the related motion control algorithms acquiring images from a stationary, down loading camera for robots required to pick "on-the-fly" objects randomly moving on conveyor belts. The instatntaneous location of moving objects is computed by vision systems. Experimentally results are finally reported in what concer...

The object oriented assisted Modelling and Simulation in Hydraulics and Pneumatics, based on physical components and the intimacy between functioning and layer properties of elements considered as multiport (sub)systems, constitutes the key of automatic interactive model generation of any installation and to obtain any simulation in a very short ti...

This paper introduces a novel approach regarding denoising and compression of measured data by using a dictionary of waveforms generated by time shifting, scaling and harmonic modulation. The dictionary can be exploited through a Genetic Matching Pursuit Algorithm succinctly described in the paper. Denoising and compression performance of the algor...

When searching for faults threatening a system, the human expert sometimes performs an amazingly accurate analysis of available information, eventually by only using some elementary statistics. Automating the reasoning mechanisms founding such an analysis is, in general, a difficult attempt, but also a possible one, in some cases. The paper aims to...

Vibrations generated by oscillations of a rotating machinery are able to encode some information about its possible defects, together with their types and severity degrees. Though vibration is not as complex as speech or seismic signals, to decode such an information is not an easy attempt. Differently form many Signal Processing applications, wher...

(Industrial) Robots constitutes together with Machine Tools, Sensors and Logistics an auxiliary but important part of the dynamic systems of manufacturing lines. To modell and control the, constituts an goal of higherst interest for students and sceintist, but also for engineers working in the developpment and service. Thus is requiring a high leve...

The paper presents the strategy of optimized and integrated design having as main part the modelling and simulation of multi-body systems. The modelling and simulation approaches are stated as basic knowledge for understanding the processes themselves. The facilities of the programs used for kinematic and dynamic simulation of multi-body systems ar...

Creativity represents the attitudes by which we develop... Creativity is actualisation of ourpotential, integration of out logical part in out intuitive part. Crcativity is more than spontaneity, it is deliberation at the same time. lt is a divergent and convergent thinking: generating multiple possibilities and choosing from them. It is more than...

The paper presents some backgrounds of teh own approachs - HYPAS - towards achieving an Open Plattform for the modules-object oriented modelling, simulation, identification and optimization -control included - of hybrid systems. HYPAS is devoted to be used for education, scientific research, technologic developpment and innovation purposes.