This study is concerned with the navigational state estimation problem for a class of networked spatial‐navigation systems subject to random parametric uncertainties (RPUs) and communication link failures (CLFs). The observations novel systems, comprising remote‐access neighbours' states relative measures, are communicated through wireless packets, thus exposed impacts RPUs CLFs. In this study, decentralised moving‐horizon approach introduced handle these ill‐conditioned issues, comprises...

The paper deals with the problem of state estimation for a class navigation-oriented carriers within navigation carrier ad-hoc networks (NC-NET): evolves according to linear discretetime model subject communication delay and packet loss. A decentralized scheme is designed mainly based on receding horizon concept. Hereinto, loss are modeled in uniform Markov process. Also, approach through reorganization measurements comprised preprocess delay-affect observations. Finally, an illustrative...

In this paper, a dynamic cooperative MAC protocol (DDC-MAC) based on cluster network topology is proposed, which has the capability of differentiated service mechanisms and long-range communication. DDC-MAC, heterogeneous communications are classified according to types quality (QoS) requirements, i.e., periodic communication mode (PC mode) extracted with QoS guarantee for high-frequency information exchange adapt-TDMA mechanisms, while other services as being in on-demand (OC mode),...

In this paper, the navigational state estimation problem is investigated for a class of networked spatial-navigation systems with quantization effects, mixed time-delays, and network-based observations (i.e. complementary measurements regional estimations). A decentralized moving horizon approach, featuring reorganization recursive procedure, proposed to tackle problem. First, through reorganized scheme, random delayed system reconstructed into an equivalent delay-free one without...

The main goal of this research is concerning protocols to contain in-motion sensor nodes in large-scale topologies, and constitute a fleet wireless network which can assistant in-flight localization alignment for carrier-based aircraft. In paper, we abstract model according specific conditions F-WSN, select performance indicators evaluate it. A distributed multiple-weight data gathering aggregation protocol (DMDG) proposed, contains all-sided active clustering scheme realizes long-range...

The necessity recurrently comes to align a strapdown inertial navigation system (SINS) in moving vehicle guarantee the accuracy and efficiency long run-off of after take-off or launch command is issued.This in-flight alignment therefore achieved by integrating SINS data with some external aiding source inlcluding airborne equipments networking sensors.In this paper, localization architecture scheme presented for aircraft three-demensional fleet network, which based on wireless sensor...

This article deals with the decentralized navigational state estimation problem for a class of networked navigation systems, in order that average performance system carriers is guaranteed over given finite-horizon. The observations novel system, comprising cooperative information neighbors and locally relative measures, are transmitted through randomly switching topology network finite channel capacity, thus exposed to impacts quantization effect, saturation, colored noise. In this study,...

High specific capacitance, rapid charge–discharge kinetics, good cycle stability, scalability, and synthetic control are just a few of the many advantages that Co 3 O 4 nanoflowers provide as electrode materials for supercapacitors. Based on aforementioned outstanding capabilities, attractive options range energy storage uses, such grid-level storage, electric cars, portable devices, renewable systems. Herein, an exhibit electrochemical supercapacitance 700 F/g at 15 A/g, with exceptional...

In view of the long alignment time ground static base for unmanned aerial vehicle (UAV), an in-flight misalignment attitude estimation method airborne SINS was presented which based on GPS observations and a novel model predict filter (MPF). The procedure can be divided into two stage, i.e., coarse stage during uniform straight-line motion aircraft, in used to obtain initial position, velocity azimuth SINS; accurate S flight aircraft MPF combined with unscented Kalman (UKF) estimate error...

Because the wind farm outgoing capacity setting calculation, and standard speed is far lower in comparison to actual operating speed, resulting a waste of field's transmission capability. This study presents an approach for capability which considering turbine's output features allowable carrying current lines. By analyzing power curve maximum line farm's total are dynamically matched under different speeds. For operation, calculated, while design, proposed method could reduce...

Dynamic forecasts of transmission line load capacity may be beneficial to the management fault repair and scheduling schemes. Based on changes in operating environment, this approach can used forecast multi-time scale lines. In order achieve live learning, Elman neural networks are merge historical data temperature, wind speed, load. Dynamically forecasting permitted lines at various periods is based steady-state transient heat calculations. By comparing with capacity, we suggest a method...

This paper is concerned with state estimation for networked navigation system packet dropouts. The dropout phenomenon modeled by a stochastic variable satisfying the Bernoulli binary distribution, predictor of lost measurement used as compensator when packets occur. At each local estimator, moving horizon strategy applied to update state, in which only cooperative and relative measurements over most recent time are used. Then fusion estimator obtained applying covariance intersection...

Gyroscope-Free Strap-down Inertial Navigation System (GFSINS) can play the role of inertial measurement and navigation only using accelerometers, which owns wide application foreground. However, low precision calculating angular-velocity is always bottleneck problem in reality. To improve it, an intelligent weighted method designed ably based on a nine accelerometers allocation scheme provide two calculated value angular velocity (integral extracted values). In every sub-circle this method,...

In this paper, the on-line calibration problem for low-cost IMU of UAV has been studied. A robust H∞ estimation scheme is designed such that, in presence modelling error, asynchronous sampling issue, and filtering bias, overall dynamics exponentially stable mean square; at same time, applicable to online with time. More specifically, a novel attitude angle matching proposed. Hereinto, measurement model deduced detail scheme, influences amplitude frequency on misalignment analyzed detail....

Abstract To achieve the defect testing of anchor bolts and other buried bolt systems, a phased array ultrasonic guided wave transducer was designed in this paper. By designing type, number elements, frequency, chip size scanning mode, it can effectively avoid interference thread reflection signals, improve signal-to-noise ratio reliability detection results. The verified by experiment simulation sample.

In this paper, a decentralized receding horizon fusion strategy (DRHF), mainly based on cooperative packets and relative observations, is proposed for navigational state estimation problems of networked vehicles: class linear discrete-time systems with limited data rate. The resulting min-max problem solved by recursive scheme, which suitable computation in online applications. convergence properties the optimal estimator are also studied. Finally, an illustrative example UAVs given to...

Networked navigation system (NNS) enables a wealth of new applications where real-time estimation is essential. In this paper, an adaptive horizon estimator has been addressed to solve the navigational state problem NNS with features remote sensing complementary observations (RSOs) and mixed LOS/NLOS environments. our approach, it assumed that RSOs are essential local processor but suffer from random transmission delay; jump Markov modeled switching parameters corresponding errors. An...

The alignment of a strapdown inertial navagation system (SDINS) is the process whereby orientation body frame determined with respect to navigation [. In broad sense, SDINS can be classified as initial and in-flight (IFA). IFA performed IMU external sensors during vehicle flight [2,, in which primary assistant sources are satellite system, radar, or other airborne equipment, offering reference signals like position, velocity, attitude assist [4,. However, these have disadvantages redundancy,...

The operation of the electricity system faces difficulty minimizing ice damage to transmission lines. Due uncertainty line icing thickness, accurate prediction thickness is very important guide planning and power grid anti-icing design effectively. Scientific reasonable early warning assessment conductor also helpful make timely response measures possible freezing disaster risk, so as effectively ensure safe stable reduce occurrence disaster. Based on this, this paper proposes a multi-factor...

This paper mainly realize in-flight localization and alignment for carrier-based aircraft in a three-dimensional fleet network. A 3D node scheme is presented based on weighed-multidimensional scaling, which adopt spherical locating the initial stage, adaptively choose source nodes with high relative reliability to achieve position update. Then robust filter algorithm applied compensate time-varying delay error large azimuth uncertainty alignment. Extensive simulation shows that DMDG-3D can...