scholarly journals Autonomous Navigation Control of UAV Using Wireless Smart Meter Devices

2019 ◽  
Vol 2 ◽  
pp. 64-72 ◽  
Author(s):  
Kiyoshi Ueda ◽  
Takumi Miyoshi
Keyword(s):  
Autonomous Navigation ◽  
Service Management ◽  
Control Method ◽  
Transmission Loss ◽  
Access Network ◽  
Electric Energy ◽  
Home Delivery ◽  
Test System ◽  
Management Control ◽  
Smart Meter

In preparation for the upcoming home delivery services that rely on Unmanned Aerial Vehicles (UAVs), we developed a new multi-hop radio network that is laid over a smart meter network transferring electric energy information only. In this network, a UAV follows, for navigation purposes, the topology of a virtual network overlaid on the physical smart meter network. We established a service management control method which does not rely on image analysis or map information processing, i.e. processes that consume precious power resources of the UAV. Instead, navigation is based on the routing technology. The current distance between the UAV and a node of the smart meter network is measured by means of the radio transmission loss value, therefore determining the position of the UAV. A two-layer network model has been proposed. One layer consists of a network of nodes in a residential area with scattered buildings – a location that is safer to navigate – while the other is an access network of nodes in a densely populated area. Then, we proposed methods to determine the direction of movement towards the next hop node on the data-link layer and the end node on the network layer, which is the target destination. We implemented a software-based test system and verified the effectiveness of the proposed methods.

scholarly journals Bidirectional Power Sharing for DC Microgrid Enabled by Dual Active Bridge DC-DC Converter

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 404
Author(s):  
Sara J. Ríos ◽  
Daniel J. Pagano ◽  
Kevin E. Lucas
Keyword(s):  
Power Management ◽  
Distribution Systems ◽  
Control Method ◽  
Dynamic Performance ◽  
Management Control ◽  
Photovoltaic System ◽  
Dc Microgrid ◽  
Dual Active Bridge ◽  
Control Scheme ◽  
Bidirectional Power Flow

Currently, high-performance power conversion requirements are of increasing interest in microgrid applications. In fact, isolated bidirectional dc-dc converters are widely used in modern dc distribution systems. The dual active bridge (DAB) dc-dc converter is identified as one of the most promising converter topology for the mentioned applications, due to its benefits of high power density, electrical isolation, bidirectional power flow, zero-voltage switching, and symmetrical structure. This study presents a power management control scheme in order to ensure the power balance of a dc microgrid in stand-alone operation, where the renewable energy source (RES) and the battery energy storage (BES) unit are interfaced by DAB converters. The power management algorithm, as introduced in this work, selects the proper operation of the RES system and BES system, based on load/generation power and state-of-charge of the battery conditions. Moreover, a nonlinear robust control strategy is proposed when the DAB converters are in voltage-mode-control in order to enhance the dynamic performance and robustness of the common dc-bus voltage, in addition to overcoming the instability problems that are caused by constant power loads and the dynamic interactions of power electronic converters. The simulation platform is developed in MATLAB/Simulink, where a photovoltaic system and battery system are selected as the typical RES and BES, respectively. Assessments on the performance of the proposed control scheme are conducted. Comparisons with the other control method are also provided.

Development of a Ring Permeability Test System

2010 ◽  
Vol 136 ◽  
pp. 153-157
Author(s):  
Yu Hong Du ◽  
Xiu Ming Jiang ◽  
Xiu Ren Li
Keyword(s):  
Control System ◽  
Control Method ◽  
Dynamic Performance ◽  
Experimental Tests ◽  
Measuring Method ◽  
Test System ◽  
Fluid Theory ◽  
And Control ◽  
Relationship Of ◽  
The Mathematical Model

To solve the problem of detecting the permeability of the textile machinery, a dedicated test system has been developed based on the pressure difference measuring method. The established system has a number of advantages including simple, fast and accurate. The mathematical model of influencing factors for permeability is derived based on fluid theory, and the relationship of these parameters is achieved. Further investigations are directed towards the inherent characteristics of the control system. Based on the established model and measuring features, an information fusion based clustering control system is proposed to implement the measurement. Using this mechanical structure, a PID control system and a cluster control system have been developed. Simulation and experimental tests are carried out to examine the performance of the established system. It is noted that the clustering method has a high dynamic performance and control accuracy. This cluster fusion control method has been successfully utilized in powder metallurgy collar permeability testing.

The Application of Broadband Power Line Carrier Communication in Electric Energy Data Acquisition Remote Communication

2014 ◽  
Vol 1046 ◽  
pp. 305-309 ◽  
Author(s):  
Ji Li ◽  
Zhi Bin Zang ◽  
Da Peng Lin ◽  
Ye Shen He ◽  
Jing Jing Xie ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Communication Channel ◽  
Access Network ◽  
Electric Energy ◽  
Power Line ◽  
Remote Communication ◽  
Energy Data ◽  
Power Line Carrier ◽  
Power Line Carrier Communication ◽  
Carrier Communication

The remote communication is an important part of electric energy data acquisition system. Currently, the electric energy data acquisition remote communication has these disadvantages such as high costs of GPRS rental , poor reliability and it’s hard to meet the demand of real-time fee control and other senior business. To solve these problems, this paper proposes a solution for electric energy data acquisition remote communication channel by using built fiber access network to combine with broadband power line carrier communication technology .This solution have achieved a good result through field pilot application and validated the feasibility of it.

scholarly journals Research of smart meter design scheme based on IR46

2019 ◽  
Vol 118 ◽  
pp. 02008
Author(s):  
Lei Song ◽  
Yi-na Chen ◽  
Huan-jun Chen ◽  
Lei Wang ◽  
Yong-jin Xu ◽  
...  
Keyword(s):  
Electric Energy ◽  
National Standards ◽  
Smart Meter ◽  
Software Protection ◽  
Design Scheme ◽  
Energy Meter ◽  
Electric Energy Meter ◽  
Dual Core

This paper compares the differences between the International Recommendation46 (IR46 for short) and the current national standards for electric energy meter of the accuracy classes, testing requirements, software protection and so on. The national meter adaptability of IR46 is analyzed, and a technical proposal of dual-core smart meter is advanced. This proposal could match the testing and software protection requirements for IR46, and could implementation in China.

scholarly journals An autonomous dynamic collision avoidance control method for unmanned surface vehicle in unknown ocean environment

2019 ◽  
Vol 16 (2) ◽  
pp. 172988141983158 ◽  
Author(s):  
Yunsheng Fan ◽  
Xiaojie Sun ◽  
Guofeng Wang
Keyword(s):  
Collision Avoidance ◽  
Autonomous Navigation ◽  
Control Method ◽  
Unmanned Surface Vehicle ◽  
Time Dynamic ◽  
Collision Avoidance Control ◽  
Dynamic Obstacle Avoidance ◽  
Avoidance Control ◽  
Dynamic Obstacle ◽  
Ocean Environment

There are many unknown obstacles in the sea, so the autonomous navigation of unmanned surface vehicle needs to avoid them as soon as possible even under the condition of low control ability of the controller. To solve the problem, by combining the dynamic collision avoidance algorithm and tracking control, a dynamic collision avoidance control method in the unknown ocean environment is presented. In this article, in consideration of the unknown ocean environment and real-time dynamic obstacle avoidance problem, the collision avoidance controller using a velocity resolution method and backstepping tracking controller based on unmanned surface vehicle maneuvering motion model is designed. Simulation results show that the method is effective and accurate and can provide the reference for the unmanned surface vehicle intelligent collision avoidance control technology.

AXIAL-FLOW BLOOD PUMP ACCELERATION CONTROL METHOD BASED ON A START-UP PROCESS DYNAMIC MODEL

2017 ◽  
Vol 41 (5) ◽  
pp. 691-705
Author(s):  
Xu Yan ◽  
Pang Youxia ◽  
Cheng Lizhi ◽  
Liang Liang
Keyword(s):  
Dynamic Model ◽  
Control Method ◽  
Axial Flow ◽  
Test System ◽  
Blood Pump ◽  
Theoretical Simulation ◽  
Process Dynamic ◽  
Axial Flow Blood Pump ◽  
Start Up ◽  
Set Up

The principle of a large gap magnetic drive system was used to achieve control of an axial-flow blood pump. A dynamic model of the start-up process of the axial-flow blood pump was established. It was analyzed and simulated. An acceleration control method for the blood pump was proposed based on the start-up process dynamic model. A corresponding parameter measurement test system was set up, and experimental data were compared with the results of the theoretical simulation. Results indicated that the experimental values obtained for the blood pump outlet pressure and flow rate changed similarly with the values obtained using theoretical simulation. These changes occurred simultaneously with the change in speed of the blood pump over time, and the driving control target value was reached within 4 seconds.

Parallel Pump-Controlled Multi-Chamber Cylinder

2014 ◽  
Author(s):  
Olli Niemi-Pynttäri ◽  
Matti Linjama ◽  
Arto Laamanen ◽  
Kalevi Huhtala
Keyword(s):  
Control Method ◽  
Effective Area ◽  
Test System ◽  
Discrete Control ◽  
Load Force ◽  
Energy Recuperation ◽  
Cylinder Piston ◽  
Discrete Flow ◽  
System Properties ◽  
Velocity Tracking

This study focused on the use of fixed displacement pumps in parallel connection to control the velocity of a multi-chamber cylinder piston. The system’s basic principle was to combine the discrete flow supply control of parallel pumps with the discrete effective area control of a multi-chamber cylinder to produce a speed control resolution high enough for accurate velocity tracking and positioning. Some throttling was used in the return line to control the system with overrunning loads. The properties of the system were tested with a 1-DOF boom mockup mimicking a medium-sized mobile machine boom. The test system revealed a feature that caused load acceleration to drop when the effective cylinder area was reduced during movement. Additionally, some delay was observed in accelerating the piston against the load force. These two system properties along with the discrete control method resulted in mediocre speed and position tracking in the system when movement was directed against the load force. The system was able to control restricting and overrunning loads as well as a large inertia mass with a low load force. The system’s energy losses were low considering that no pressure accumulators were used, but the throttling losses in the return line and the lack of energy recuperation leave room for improvement.

Linear State Estimation Based on Measured Quantity Transformation and Calculation of Transmission Losses

2014 ◽  
Vol 672-674 ◽  
pp. 1027-1031
Author(s):  
Gui Hua Lin ◽  
Tao Wang ◽  
Yu Ying Wang
Keyword(s):  
State Estimation ◽  
Transmission Loss ◽  
Information Matrix ◽  
Test System ◽  
Measured Quantity ◽  
Voltage Measurement ◽  
Static State ◽  
Calculation Results ◽  
Linear State ◽  
Nodal Voltage

A linear static state estimation on measured quantity transformation is proposed in this paper utilizing the high precision measurements of WAMS. Using transformation of measured quantity, the current measurements of WAMS are transformed into equivalent voltage measurement, and after simplification a constant real number information matrix is obtained, so the decoupling calculation of real part and imaginary part of nodal voltage is realized. The calculation has many advantages such as fast proposed algorithm, high estimation precision and better numerical stability. Finally, the algorithm is applied to the calculation of network loss in theory, the calculation accuracy of transmission loss is improved. The calculation results of IEEE 30-bus test system validate the effectiveness of the proposed method.

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