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This paper shows one possible way of using MATLAB® System Identification Toolbox when identifying parameters for human (a pilot) behaviour model. Based on these parameters and their changes in time, it is possible to analyse the pilot's individual dynamic properties representing their abilities, capabilities and skills. Input data for this identification tool and their consequent analysis are time...
The mechanical behavior of lead free solders is highly dependent on the testing temperature. Previous investigations on mechanical characterization of conventional and doped lead free SAC solders have mainly emphasized stress-strain and creep testing at temperatures from 25 to 125 °C. However, solders are exposed to very high temperatures from 125–200 °C in several harsh environment applications including...
This paper presents the design of a flexure-based precision positioning micro-motion stage system with constant output force. The stage mechanism is devised using folded leaf flexure (FLF) to achieve positive-stiffness structure. Bistable beams are employed to design negative-stiffness structure by using their buckling characteristics. Two bistable beams and two FLFs are combined together as a zero-stiffness...
A novel approach of a testbed for embedded networking nodes has been conceptualized and implemented. It is based on the use of virtual nodes in a PC environment, where each node executes the original embedded code. Different nodes are running in parallel and are connected via so-called virtual interfaces. The presented approach is very efficient and allows a simple description of test cases without...
Recognizing human faces is one of the most popular problems in the field of pattern recognition. Many approaches and methods have been tested and applied on the topic, especially neural networks. This paper proposed a new loss layer that can be replaced at the bottom of a neural network architecture in terms of face recognition, called constrained triplet loss layer (CTLL). In order to make more confident...
Integrating Analog to Digital Converters (lADCs) are known for high resolution and continuous transfer characteristics. Nonlinearity of the transfer characteristics is influenced by dielectric absorption of the integrating capacitor, which is the only external element. The nonlinearity can be compensated if dielectric absorption elements are known. This article deals with such compensation by means...
During these years, the accident of grounding grid equipment occurs more frequently in the substation, which has been one of the most serious threat to safety and stability of power system. Traditional detection method is blind, slowly and uneconomical to find the erosion point. This paper provides an method based on the analysis of testability in topology of substation grounding grid. Through the...
During the last decades the number of microgrids and their research have increased notably, as they offer a high versatility for the integration of distributed generation (DG) units and renewable energies. Among the different types of microgrids, dc systems are becoming more popular due to their advantages over conventional ac systems. However, their control techniques differ from the ones employed...
This paper proposes a Bayesian nonparametric method for detecting thermoacoustic instabilities in gas turbine engines in real-time, where the underlying algorithms are formulated in the symbolic domain and the resulting patterns are constructed from symbolized pressure measurements as probabilistic finite state automata (PFSA) that is built upon a finite-memory Markov model, called D-Markov machine...
The hysteresis model with advantages of easy implementation and high identification accuracy is highly desired in the numerical electromagnetic-field simulations, compensation and control of smart actuators, etc.
A new calibration method for Inertial Measurement Unit (IMU) of strapdown inertial technology was presented. IMU has been composed of accelerometers, gyroscopes and a circuit of signal processing. Normally, a rate transfer test and multi-position tests are used for IMU calibration. The new calibration method is based on whole angle rotation or finite rotation. In fact it is suggested to turn over...
Due to the Industrial Internet of Things and rising complexity of intelligent technical systems efficient design and test processes for mechanical and plant engineering become more important. The design and test process encompasses the discipline-spanning system design in early phases, virtual prototyping as well as virtual commissioning in test phases. This contribution illustrates a holistic model-based...
The medium-speed rotary emulator at the Lir National Ocean Test Facility (NOTF) at the MaREI Centre at University College Cork was developed to allow for rotating renewable energy converters to be physically tested prior to full development and deployment. This paper outlines processes used to characterise the medium-speed rotary emulator. The system was subjected to a number of tests to determine...
All engineering disciplines are founded and rely on models, although they may differ on purposes and usages of modeling. Interdisciplinary domains such as Cyber Physical Systems (CPSs) seek approaches that incorporate different modeling needs and usages. Specifically, the Simulink modeling platform greatly appeals to CPS engineers due to its seamless support for simulation and code generation. In...
Increasingly, we are faced with systems that are untestable, meaning that traditional testing methods are expensive, time-consuming or infeasible to apply due to factors such as the systems' continuous interactions with the environment and the deep intertwining of software with hardware. In this paper we outline our vision to enable testing of untestable systems. Our key idea is to frame testing on...
We present SimCoTest, a tool to generate small test suites with high fault revealing ability for Simulink/Stateflow controllers. SimCoTest uses meta-heuristic search to (1) maximize the likelihood of presence of specific failure patterns in output signals (failure-based test generation), and to (2) maximize diversity of output signal shapes (output diversity test generation). SimCoTest has been evaluated...
Analyzing a possibility of using the solar cell energy to LED bulb in daytime. The buck converter is used to adjust the voltage, match the magnitude voltage of the LED bulbs, A PI maintained to control the stability of the voltage as well. The purpose of LED research is a process of preventing loses power by doing the process of a Buck Converter testing with LED bulbs without converting DC to AC....
This paper presents the power loss identification of the three-phase induction motor. The power losses are considered in the model of three-phase induction motor called the power loss model. The artificial intelligence approach called the adaptive tabu search is used for the power loss parameters identification. The results show that the proposed algorithm can identify the optimal values of the power...
Despite analog SPICE-like simulators have reached their maturity, most of them were not originally conceived for simulating faulty circuits. With the advent of smart systems, fault testing has to deal with models encompassing both analog and digital blocks. Due to their complexity, the industry is still lacking of effective testing approaches for these analog and mixed-signal (AMS) models. The current...
We are interested in boundary integral formulations adapted to the solution of low frequency inductive electromagnetics in the case where the geometry is partitioned in (potentially irregular) subdomains. In the context of electromagnetics in piecewise homogeneous media, the multi-trace formalism (MTF) provides boundary integral formulations for Maxwell's equations posed at the interfaces between...
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