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The microgrid with distributed PV and air source heat pump is studied, aim at the problem of controller saturation caused by the lag of the static switch and the mismatch between the operation mode and the control method, droop control is used in island mode and grid-connected mode, an improved pre-synchronization control algorithm is proposed to ensure the smooth transition of the microgrid transient...
Acquirement of load spectrum is an important premise for predicting the fatigue life of transmission gear. Traditional methods to acquire load spectrum including theoretical calculation, bench test and simulation test can't reflect the actual loading condition. This paper extracts the load data under different gears based on vehicle proving ground test without the signal of gear change and describes...
IEC 61850 is an international standard for digital substation automation systems based on network communication platform. It has been widely used in power generation, transmission, distribution and scheduling. The protocol implemented unified modeling for object, enhanced interoperability and interchangeability between different terminals. In this paper, we apply the protocol is to power and environment...
Recently, research related to medical robots received considerable attention due to an increase in aging population. However, most of the existing approaches for designing medical robots have drawbacks in terms of lacking mobility, real-time monitoring of health conditions and emotional response. In this paper, we present a design for a cloud-assisted medical robot with mobility, which can remotely...
Reasonable authorization and access control is one of the urgent problems that cloud computing applications need to solve, especially in the context of dynamic establishment of trust relationship between entities to study the open access security environment. This paper proposes a generation method of cross-domain access control strategy from trust evaluation to trust management. Based on the trust...
For the purpose of producing more complex graphical passwords by means of smaller graphs having fewer numbers of vertices and edges for easily be remembered and difficultly be break down, we prove: (1) a tree T having n vertices has a strongly set-coloring subject to the constraint set of six restrict conditions; (2) a connected (p,q)-graph G has a strongly set-coloring subject to the constraint set...
In order to improve the tracking accuracy and the scheduling success rate on the problem of phased array radar task scheduling. Adaptive time window is proposed to solve this problem. Firstly, the target state for the next observation is predicted and the influence of time shifting is sought out. Then, the size of the time window is calculated according to the influence. Finally, the simulation is...
Field Communication Network is a complex communication network system with grid topology structure, so it is difficult to disable communication. The paper puts forward a strategy to search the topology structure using UAV. At first, the paper analyzes the characteristics of node center in Field Communication Network, combining with the direction-finding and localization ability of UAV, proving that...
With the continuous development of embedded technology, DSP and network communication technology, more and more human-computer interaction systems are applied in various enterprises. With the rapid development of the technology of semiconductor and ASIC chip, the performance of the embedded chip is also continuously enhanced. Video system is an integral part of human-computer interaction, and the...
In the process of multi axis machine tool, sometimes it is necessary to switch between the rotating spindle and the rotary feed shaft. In order to satisfy the request mentioned above, this article makes a brief introduction to the upper software and analyzes the control principle of spindle by using PMAC, combined with that, a method to deliver the automatic switching function between spindle mode...
For the problem of multi-sensor data fusion on the decision level, an evidence fusion method based on the modified support degree distribution method is proposed. First, starting from the viewpoint of classical evidence fusion formula, the reason why confidence paradox is generated is analyzed and the general rule of generating confidence paradox is achieved; second, with analysis of support degree...
GPS positioning technology and GSM wireless communication technology have been widely used in the military field and urban transportation and other civilian areas. Aiming at the singularity of handheld positioner function on the market, this paper designs a combination device of handheld positioner and tracker. By extracting GPS navigation information frame parameters and GSM wireless data transmission...
Optical Wavelength Division Multiplexing (WDM) networks based on fixed grid technology have exposed some questions, including wasting of bandwidth resources in multi-domain heterogeneous networks. Flexible grid technologies can provide end-to-end optical path according to the client flexibly and effectively. However, it is unpractical to deploy a one-time green-field flexible grid technologies subjected...
In this paper, the thermal performance of AC-LED (Alternative Current Light Emitting Diode) light engines driven by two types of alternative current input voltage were analyzed, based on the results of transient temperature rise measurements using infrared camera module. The one was driven by 110V alternative current, and the another one was 220V alternative current. A novel infrared image measurement...
Industrial mechanical arm is widely used in aircraft manufacturing such as aircraft skin drilling and riveting. However, due to the open-loop controlling of the mechanical arm, the positioning precision cannot meet the high accuracy requirement in aircraft manufacturing. Therefore, this paper proposes a novel automatic tracking approach by using monocular vision technology. Due to the uncertain attitude...
500kV substation on duty gradually tends to be unmanned with the development of smart grids, the mobile robot that used in substation equipment inspection emerge as the times require. Substation inspection robot system, which is described in this paper, can replace a fixed video monitoring, complete video remote transmission of information, equipment control, accident treatment and coordinated transport...
Wearable exoskeleton foot pressure detection system has great significance for human motion information detection and gait recognition. In this paper, the use of resistive pressure sensor to make up for the existing lower extremity exoskeleton pressure sensor input and output non-linear error, which can't accurately detect the lack of plantar pressure changes, through the theoretical calculation to...
Resistor detection are mostly suffered from compact size and multiple interferences of environment. In this paper, a method for resistor detection was proposed, which combined selective search (SS), convolutional neural networks (CNNs) and support vector machine (SVM). Using improved selective search method to reduce the time of generating candidate regions; taking advantages of independent features...
The vehicular inverted pendulum (VIP) system is one of the most important issues in dynamics and control theory, and has been widely used as a benchmark for testing control algorithms. However, the tracking control and swing-up control of the VIP system have often been investigated separately. In this paper, by combining the Zhang dynamics (ZD) method and the traditional gradient dynamics (GD) method,...
Aiming at the problem of complex roof reconstruction in airborne LiDAR data processing, an algorithm of reconstructing building models based on isoheight is proposed in this paper. Extracting points in the elevation scopes and fitting contours in different elevation, the key points of the roof models can be got. By the key points, we can get roof planes intersecting lines approximately. Through the...
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