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In this paper, we propose a positioning system using a time-synchronized wireless network that can achieve high positioning accuracy without being dependent on any global positioning system (GPS) devices with cm-level accuracy as the main goal and objective. The proposed system utilizes time of arrival (ToA) method to estimate the target's position. Based on the results, we can achieve time synchronization...
In this paper, the problem of H∞ sliding mode control for discrete-time singular systems with time-varying delay is studied. A new type of sliding mode surface involving the singular matrix E is proposed firstly, based on which, a less conservative condition is obtained to guarantee the ideal sliding mode dynamics of the singular system to be admissible with a γ-Ievel disturbance attenuation of the...
Low latency is critical for delay-sensitive applications such as video surveillance, live streaming, and online data analytics. Fog computing enables the emergence of the latency-sensitive internet of things (IoT) network to support real-time applications. While the distance between sensing and processing is minimized in the fog network, the cross-fog latency is yet to be determined. In this paper,...
Sensorless control is a promising alternative for controlling Electric Vehicle (EV) and Hybrid Electric Vehicle (HEV) propulsion systems without the need of complex devices, such as resolvers or encoders. As the usage of a physical sensor is avoided, this allows significant cost reductions of the drive, and the reliability of the system is also improved. EVs require an operation range from standstill...
This article describes the general theory of determining the time response characteristics of different component parts of modern automated control systems (ACS) and the method of calculating constraints on the time response characteristics of information security systems (ISS) used in ACS as real-time systems. For an arbitrary manufacturing process (both under development and existing) ACS, this...
This paper deals with the problem of reachable set bounding for interval time-varying delay system with disturbances. A generalized reciprocally convex combination lemma and a new Lyapunov-Krasovskii functional (LKF) are given to obtain the delay-dependent criterion. The reachable set of time-varying delay systems with bounded peak disturbances is contained in the ellipsoid base this result. Meanwhile,...
Multi-channel speech enhancement algorithms rely on a synchronous sampling of the microphone signals. This, however, cannot always be guaranteed, especially if the sensors are distributed in an environment. To avoid performance degradation the sampling rate offset needs to be estimated and compensated for. In this contribution we extend the recently proposed coherence drift based method in two important...
For interior permanent magnet synchronous motor (IPMSM) drives, high-frequency (HF) rotating voltage signal injection method is widely employed to estimate the initial rotor position. However, conventional demodulation method based on current phase is complex and susceptible to filters and digital control delays, an amplitude demodulation algorithm is proposed in this paper. With the proposed method,...
In this paper, a modified and improved approach to the recently proposed multiple-resonator-based observer structure for harmonic estimation has been proposed. In the previous papers, two inherent particular cases have been considered. In the first case, estimation is performed in the point located in the middle of the observation interval, and exhibits good noises and unwanted harmonics attenuation...
In this paper, we propose a scheme in which a communication relay unmanned aerial vehicle (UAV) estimates the distribution of the terminals and selects the optimal relay position for autonomous maneuvering. In order to accomplish mission success, warfighters on the battlefield must communicate with their commander all the time. Autonomous maneuvering of a relay UAV using the proposed scheme will support...
This paper presents an Unscented Kalman filter (UKF) based algorithm for estimating available bandwidth in a space Disruption-Tolerant Network (DTN) link. In the proposed algorithm, an UKF model is proposed for accurately tracking available bandwidth of bundle delivery over a space link. In particular, the proposed UKF will iteratively filter a serial of noised measurements on successive time intervals,...
In this paper, we propose and analyze new spectrum-efficient communication and radar sensing systems (named ComSens) operating in full-duplex mode with frequency division duplex scheme. ComSens simultaneously use the pilot overhead for channel estimation and radar sensing. The performances of ComSens are analyzed in terms of ergodic communication data-rate and radar estimation rate. The total system...
A fault tolerant position estimation for Switched Reluctance Motor (SRM) is proposed in the paper based on relationship between inductance and rotor position. First, the particular position signal is obtained by comparing the real-time flux linkage with the particular position flux linkage, the position is estimated by the particular position signal. Second, the delay method is used based on inter-phase...
In this work, a multiple synchronous reference frame (MSRF) based plus optimized Moving Average Filter (MAF) is employed to extract the harmonics and interharmonics components of a three-phase current waveform recorded from transformer substation that feeds Electric Arc Furnace (EAF). EAF currents are one of the most critical issues in power quality (PQ) that usually cost issues like the light flicker...
This paper addresses the problem of how to estimate performance of distributed IEC 61499 automation systems and optionally, how to improve end-to-end response times in general. In order to make the process of distributed automation system design and deployment more streamlined, a software tool which could reliably estimate end-to-end response times within a system offline would be very beneficial...
The purpose of this paper is to prove the accuracy and reliability of a novel FPGA-based tracker of the muscle conduction velocity in ordinary dynamic contractions, such as during the gait. In this work, we present the digital signal-processing unit. The system performs the acquisition of the needed bio-signal, from 4 wireless surface EMG electrodes. The acquired data undergo to a dynamic bit-stream...
Due to the sparsity that contained in underwater acoustic (UWA) channels, in recent years tremendous attention has been drawn in designing sparse channel estimation algorithms for improve the performance of channel equalizer, which is driven by channel estimator. However, experimental evaluation and comparison is limited regarding enhancing the performance of different norm constraint sparse channel...
The aim of this paper is to investigate the implementation of an adaptive generalized delayed signal cancellation (DSC) method for estimation of phase-sequence components. The proposed approach overcomes the intrinsic problems of the digital implementation of the classical DSC algorithm due to nonideal selection of the sampling frequency and variations in the nominal system frequency. The derived...
We considered the range of PPP online services that solve the problem of high-precision coordinates and receiver time scale shift determination for the RINEX daily records. The comparative estimation of exact indicators of position determination for different geoids is given. The results contains the recommendations for use the online PPP services to solve the problem of time scales comparison.
Phaser measurement unit (PMU) is one of the key components in present wide area monitoring, protection, and control systems (wAMPAC). There are delays in PMU measurements due to the delay in PMU signal acquisition that may affect the performance of applications in real time in the grid. In this paper, in order to mitigate the effect of signal acquisition delays, a predicting model of PMU is proposed...
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