Dynamic deformation of a vehicle and relative position inertial navigation systems will cause large errors during information sharing. Such should be estimated compensated effectively, or it to output. Therefore, the model between angle dynamic lever arm is established verify that influence not coaxial but decussate. Then, estimation compensation methods for are proposed with real-time closed-loop correction lever-arm length. Simulation results demonstrate that, misalignment angle, method...

Abstract The dynamic crack propagation characteristics of brittle materials are a crucial focus in impact dynamics. randomness growth under loading poses significant challenges to accurately monitoring behavior during experiments. In this study, two novel refinement measurement techniques based on optical frequency domain reflectometry technology were developed provide more comprehensive strain distribution data and capture detailed behavior. Additionally, trending algorithm was introduced...

We propose a generation laser scanning method for imaging of the propagation ultrasounds. By pulsed-laser beam on an object ultrasounds, propagated ultrasounds were detected by fixed PZT transducer. Although waves generated from different irradiation points, we could, means simple data processing, produce dynamic images reception transducer position. Since this requires no adjustment incident angle or focus, can easily visualize ultrasound propagating solid media having complicated shape....

As sustainable natural sources such as wind and solar are increasingly integrated into power grids, conventional fossil fuel-based generating units will be gradually replaced, resulting in enormous pressure on frequency regulation of the novel systems. This paper proposes a method for implementing cascaded load-damping factor controller based controlled controller. Series-type voltage regulators, namely, solid-state transformers or dynamic restorers, can regulate 10 kV feeder within allowed...

Multi-task remote sensing sensors have become attractive development directions of aerial system, which rely on distributed position and orientation system (DPOS) to provide multi-node motion parameters achieve superior performance. DPOS depends transfer alignment from its master slave inertial measurement units obtain information. However, for DPOS, there are many factors like carrier maneuver mode external disturbance will result in time-varying noise further degrade performance obviously....

A new four-parameter modified refractivity profile (Mprofile) model for the evaporation duct is introduced in this paper.In estimation of radio structure from sea clutters, a parametric M-profile normally employed.The conventional ducts one-parameter log linear model, which has some potential disadvantages describing observed M-profiles would result rough results estimation.Based on three parameters are and proposed here.This ability to (a) more accurately match real-world M-profiles, (b)...

During attitude determination using a global positioning system (GPS), cycle slips occur due to the loss of lock and noise disturbance. Therefore, integer ambiguity needs re-computation isolate error in carrier phase. This paper presents fast method for resolution land vehicle application. After are detected, velocity vector is utilized obtain rough baseline vector. The obtained substituted into phase observation equations solve float solution which can be used as constraint accelerate...

Considering two disadvantages in traditional gravity matching aided inertial navigation system, low accuracy and error accumulation, we propose an improved algorithm method for system. Instead of using the sequence sampling, single point sampling is applied to improve structure proposed algorithm, enhancing speed efficiency. In system method, use combination Sage-Husa adaptive filter strong-tracked Kalman make further optimal estimation trajectory. Simulation results show effectiveness...

The corrosion behavior of hot‐dip Al–Zn–Si, Al–Zn–Si–RE, and Al–Zn–Si–RE–Mg coatings was investigated by neutral salt spray test electrochemical measurements. obtained results indicate that the elements RE Mg can reduce defects create a finer microstructure. Al–Zn–Si alloy coating corroded with red rust after 168 h experiment, while Al–Zn–Si–RE had better resistance where only small amount appeared 360 h. products formed on surface three consisted mainly Al‐rich phase gibbsite Al 2 O 3 · nH...

A method for retrieving evaporation duct height (EDH) is introduced in this paper.The proposed technique employs the changes radar sea clutter power observed at different heights as input information.It identifies EDH associated with modeled change pattern that best matches measured patterns.The performance of evaluated terms RMS errors actual EDHs range from 0 to 40 m.The comparison conventional matching shows former more effectively retrieves EDHs.

To address the efficiency bottleneck encountered in reactor design calculations for newly developed lead-based neutronics analysis code system MOSASAUR, we recently acceleration functions based on various coarse-mesh finite difference (CMFD) methods and spatial domain decomposition parallel algorithm. However, applicability of these improvements to different reactors remains be analyzed. This work collected established core models types reactor. Based SN nodal transport solvers, analyzed...

Position and Orientation system (POS), a loosely integrated inertial navigation (INS) global positioning (GPS), can provide high-accuracy motion information for the airborne remote sensing loads, which plays crucial role in imaging. However, POS often suffers from harsh environment, such as aircraft maneuver mode other external disturbance, will lead to measurement noise unknown further affects accuracy of parameters. In this paper, an adaptive central difference Kalman filter method based...

Airborne position and orientation system (POS) can provide high accuracy motion parameters for multiple aerial mission loads has become a vital equipment in remote sensing system. However, the airborne POS often suffers from systematic kinematic model observation inaccuracy, which further affects of parameters, conventional innovation-based adaptive method only deals with inaccuracy results limited performance improvement. In this paper, dual factors filtering algorithm is adopted to deal...

Abstract:

Distributed position and orientation system (POS) plays an important role in the fields of aerial remote sensing, which serves sensors by precise motion information. For distributed POS, slave systems consist low accuracy inertial sensors, must depend on high information master to proceed transfer alignment (TA) improve accuracy. Generally, TA filtering algorithms perform superior performance when noise statistical characteristic is known accurate, however like gust, engine vibration other...

A distributed position and orientation system (DPOS) can provide abundant motion parameters for multi-task remote sensing loads to conduct its compensation. The of imaging equipped with slave Inertial Measurement Units (IMUs) be obtained by transfer alignment from master IMU. However, considering the volume, weight, cost IMU, it is impossible install IMUs near all in engineering practice. Aiming at problem, a global estimation method based on spatial-temporal Kalman filter (STKF) DPOS...