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For position sensorless control of permanent magnet synchronous motor (PMSM), a single position estimation control algorithm is difficult to satisfy the accurate estimation of the rotor speed and position in wide speed range. In this paper, the influence of non-ideal factors such as inverter non-ideal factors, stator resistance changes on the accuracy of position estimation are analyzed. According...
In recent years, permanent magnet synchronous motors (PMSM) are becoming popular in industrial applications. It is difficult to have perfectly balanced 3 phase ac supply voltages in power system. In fact, line supply voltages typically differ by a few volts or more, and hence unbalanced supply voltages can exist anywhere in a three-phase power distribution system. This paper presents a study of PMSM...
A novel series input parallel output soft-switching high step-down converter (SIPOSS-HSD) converter is proposed in this paper. The converter consists of two asymmetrical half-bridge high step-down (AHB-HSD) dc-dc converter cells in series input and parallel output connection to share the input voltage and output current. All switches of the proposed SIPOSS-HSD converter can be turned on under zero-voltage...
The dynamic voltage restorer (DVR) is a fast and efficient solution to voltage sag problems. This paper proposes a new configuration of DVR which is based on the parallel diode-clamped modular multilevel converter (parallel-DCM2C). In the parallel-DCM2C topology the capacitor voltages distributed in the sub-modules (SMs) can be balanced automatically without any balancing control algorithms. Additionally...
In this study, the feedback controllers for a power converter were designed and implemented to fulfill the constant-voltage (CV) and constant-current (CC) output modes. The topology used by the DC-DC converter was a phase-shifted full-bridge with a parallel current-doubler rectification converter (PSFB-PCDRC). In order to design the feedback controllers for the PSFB-PCDRC CV and CC operations, the...
Fault prognostic in various levels of production of semiconductor chips is considered to be a great challenge. To reduce yield loss during the manufacturing process, tool abnormalities should be detected as early as possible during process monitoring. In this paper, we propose a novel fault prognostic method based on Bayesian networks. The network is designed such that it can process both discrete...
Industrial Internet of things (IIoTs) relies on different devices working together, gathering and sharing data using multiple communication protocols. This heterogeneity becomes a hindrance in the development of architectures that can support applications operating independently of the underlying protocols. Therefore in this paper, we proposed a modular and scalable architecture based on lightweight...
This paper presents the modeling and simulation of a photovoltaic (PV) system. The equations governing the operation of the one-diode equivalent model are developed and the identification of the model parameters is performed through MATLAB script. The system studied encompasses a commercial PV panel, a dc-dc boost power converter, a battery and a dc load. The boost converter is controlled using voltage...
This paper analyzes the battery capacity degradation under different state of charge(SOC) ranges, which indicates that battery capacity degradation can be notably reduced by adjusting the way of charging electric vehicles(EVs). A customary way of charging is defined according to practical driving data. Economic analysis and numerical example, including ideal way of charging(IWC), the worst way of...
In a world with an accelerated population aging, there is an increasingly interest in developing solutions for the elderly living assistance. The Internet of Things is a new reality that is completely changing our everyday life, and promises to revolutionize modern healthcare by enabling a more personalized, preventive and collaborative form of care. Aiming to combine these two important topics, this...
The manufacturing enterprises are currently under great pressures to shorten innovation cycles, grow importance of high-efficiency manufacturing and accommodate new products by building more factories. Discrete manufacturing sectors face a huge array of problems because of its specificity. Knowledge representation is one of the most highlighted troubles. In this case, ontology is a significant knowledge...
A control system that includes a network in a feedback loop often becomes unstable, owing to a time delay in the network. Synchronous time-division multiple access (STDMA) is a dynamic routing protocol that achieves low-delay time communication. STDMA is expected to be a potential candidate in the design of a feedback control system over a network. Therefore, this paper analyzes stability and performance...
This paper dedicates to deal with the chattering phenomena of conventional sliding mode controllers (SMCs) applied in networked control systems (NCSs) and two new robust fuzzy sliding mode controllers for the lateral motion control of 4-wheel-independent-drive electric vehicles (4WID-EVs) are presented. It is well known that SMC has distinct advantages for nonlinear dynamic systems such as 4WID-EVs...
Studies show that the poor hand hygiene practices in public health institutions such as hospitals, clinics, schools and nursing homes is the most likely cause of the spread of various bacterial diseases. Proper hand hygiene is the single biggest defense against spread of diseases and therefore the caregivers' compliance with hand hygiene is one of the most effective tools in preventing Healthcare...
The challenges to deal with to design a WSN node which can be used in safety-relevant application are, to the present day, still to be completely investigated and solved. Nevertheless, a prototype implementation is presented in this paper, with an emphasis on the chosen hardware architecture and components, highlighting the limitations imposed by specific choices. Furthermore, an example application...
Embedded software development, even for real-time applications, evolved along the years from using the assembly language and custom-built schedulers — often derived from a cyclic executive — towards higher-level languages and execution models. In turn, this requires a much more sophisticated support at the toolchain level with respect to the past, especially when a real-time operating system (RTOS)...
This paper proposes a handling strategy for dynamic resource events in Cyber-Physical Production Systems (CPPS). Because of the increasing complexity and the dynamic run-time behavior, future automation systems become more and more fragile. New methods are needed to deal with such a dynamic behavior, exploiting existing degrees of freedom. Currently, existing methods are limited to single resource...
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