Modeling of SVPWM and Control Method for Driving Systems of High-speed Trains by using Multi-level Power Converters

2009 ◽  
Vol 23 (12) ◽  
pp. 136-145 ◽  
Keyword(s):  
High Speed ◽  
Power Converters ◽  
Control Method ◽  
High Speed Trains ◽  
Multi Level ◽  
And Control

Integrated guidance and control of interceptors with impact angle constraint against a high-speed maneuvering target

2019 ◽  
Vol 233 (14) ◽  
pp. 5192-5204
Author(s):  
Guanjie Hu ◽  
Jianguo Guo ◽  
Jun Zhou
Keyword(s):  
Control System ◽  
High Speed ◽  
Control Method ◽  
Impact Angle ◽  
Adaptive Sliding Mode Control ◽  
Guidance And Control ◽  
Maneuvering Target ◽  
Integrated Guidance And Control ◽  
And Control ◽  
Impact Angle Constraint

An integrated guidance and control method is investigated for interceptors with impact angle constraint against a high-speed maneuvering target. Firstly, a new control-oriented model with impact angle constraint of the integrated guidance and control system is built in the pitch plane by combining the engagement kinematics and missile dynamics model between the interceptor and target. Secondly, the flight path angle of the target is estimated by extended Kalman filter in order to transform the terminal impact angle constraint into the terminal line-of-sight angle constraint. Thirdly, a nonlinear adaptive sliding mode control law of the integrated guidance and control system is designed in order to directly obtain the rudder deflection command, which eliminates time delay caused by the traditional backstepping control method. Then the Lyapunov stability theory is used to prove the stability of the whole closed-loop integrated guidance and control system. Finally, the simulation results confirm that the integrated guidance and control method proposed in this paper can effectively improve the interception performance of the interceptor to a high-speed maneuvering target.

Recent developments in the prediction and control of aerodynamic noise from high-speed trains

2015 ◽  
Vol 3 (3) ◽  
pp. 119-150 ◽  
Author(s):  
David J. Thompson ◽  
Eduardo Latorre Iglesias ◽  
Xiaowan Liu ◽  
Jianyue Zhu ◽  
Zhiwei Hu
Keyword(s):  
High Speed ◽  
Aerodynamic Noise ◽  
Recent Developments ◽  
High Speed Trains ◽  
Prediction And Control ◽  
And Control

scholarly journals Control method of unfavorable speed interval for high-speed trains

2012 ◽  
Vol 20 (3) ◽  
pp. 153-159
Author(s):  
Lindong Wang ◽  
Qiang Huang ◽  
Yuqing Zeng ◽  
Fengtao Lin
Keyword(s):  
High Speed ◽  
Control Method ◽  
High Speed Trains

A Survey on Communication Technology of Smart Grid

2013 ◽  
Vol 749 ◽  
pp. 603-605
Author(s):  
You Jie Ma ◽  
Pan Long Jin ◽  
Xue Song Zhou
Keyword(s):  
Smart Grid ◽  
Communication Technology ◽  
Technology Use ◽  
High Speed ◽  
Control Method ◽  
Power Grid ◽  
Monitoring And Control ◽  
It Use ◽  
Electricity Grid ◽  
And Control

Modern power grid is an important part of national energy strategy. Smart grid is one of the directions to modernize the electricity grid. Smart grid is the intelligent of power system, It is also known as the grid 2.0.It is based on integrated, high-speed bidirectional communication network ,It use the advanced sensor and measuring technology, use advanced equipment and control method to realize the application of the power grid reliability, safety, economic, efficient, environmental friendly and safety. High speed, bidirectional, real-time, and integrated communication system is the foundation and key point when monitoring and control smart grid. So How to improve the communication technology is very important.

Modified MPC based grid-connected five-level inverter for photovoltaic applications

2018 ◽  
Vol 37 (2) ◽  
pp. 971-985 ◽  
Author(s):  
Mohammad Maalandish ◽  
Seyed Hossein Hosseini ◽  
Mehran Sabahi ◽  
Pouyan Asgharian
Keyword(s):  
Control Method ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Modified Model ◽  
Content Type ◽  
Current Path ◽  
Voltage Stress ◽  
Photovoltaic Applications ◽  
Multi Level ◽  
And Control

PurposeThe main purpose of this paper is to select appropriate voltage vectors in the switching techniques and, by selecting the proper voltage vectors, be able to achieve a DC link with the same outputs and a symmetric multi-level inverter. Design/methodology/approachThe proposed structure, a two-stage DC–AC symmetric multi-level inverter with modified Model Predictive Control (MMPC) method, is presented for Photovoltaic (PV) applications. The voltage of DC-link capacitors of the boost converter is controlled by MMPC control method to select appropriate switching vectors for the multi-level inverter. The proposed structure is provided for single-phase power system, which increases 65 V input voltage to 220 V/50 Hz output voltage, with 400 V DC link. Simulation results of proposed structure with MMPC method are carried out by PSCAD/EMTDC software. FindingsBased on the proposed structure and control method, total harmonic distortion (THD) reduces, which leads to lower power losses and higher circuit reliability. In addition, reducing the number of active switches in current path causes to lower voltage stress on the switches, lower PV leakage current and higher overall efficiency. Originality/valueIn the proposed structure, a new control method is presented that can make a symmetric five-level voltage with lower THD by selecting proper switching for PV applications.

Safety and Reliability of High-Speed Milling Cutter's Evaluation and Control Methods

2014 ◽  
Vol 620 ◽  
pp. 90-95
Author(s):  
Bin Jiang ◽  
Shou Zheng Sun ◽  
Ming Hui Zhang ◽  
Guang Lei Cao ◽  
Bin Sun
Keyword(s):  
High Speed ◽  
Control Method ◽  
Permanent Deformation ◽  
Safety Margin ◽  
Failure Criteria ◽  
Hardened Steel ◽  
Milling Cutter ◽  
High Speed Milling ◽  
Safety And Reliability ◽  
And Control

The existing safety evaluation of high-speed milling cutter mainly based on ISO15641 standards, which by idling experiments, then analysis and determine centrifugal force conditions what cause permanent deformation and fracture destructive of cutter, this method cannot be forecast and control the dynamic evolution of the milling cutter's safety and reliability, when cutting load changed suddenly.This paper using the high speed milling cutter's failure criteria and safety margin model of cutting hardened steel, analysed and evaluated coupled thermal field distribution caused by hardened steel surface feature that changed frequently and cutter's impact, fatigue, strength, stiffness, safety margin which cuased by mutated shock load of cutter, then forecast safety and reliability of high-speed milling cutter, and proposed the control method of safety and reliability that could milled hardened steel in high speed.

An Active Repetitive Learning Control Method for Lateral Suspension Systems of High-Speed Trains

2020 ◽  
Vol 31 (10) ◽  
pp. 4094-4103 ◽  
Author(s):  
Deqing Huang ◽  
Chunrong Chen ◽  
Tengfei Huang ◽  
Duo Zhao ◽  
Qichao Tang
Keyword(s):  
High Speed ◽  
Control Method ◽  
Learning Control ◽  
Suspension Systems ◽  
High Speed Trains ◽  
Repetitive Learning
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