scholarly journals Predictive Set Point Modulation Charging of Autonomous Rail Transit Vehicles

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4992
Author(s):  
Heng Li ◽  
Yu Zhang ◽  
Hongtao Liao ◽  
Jun Peng
Keyword(s):  
Control Method ◽  
Design Method ◽  
Rail Transit ◽  
Loop Model ◽  
Set Point ◽  
Charging System ◽  
Urban Rail ◽  
Overshoot Phenomenon ◽  
New Type ◽  
The Stability

Autonomous rail transit (ART) vehicle is a new type of urban rail transportation, which has good development prospects. It is powered by onboard supercapacitors, which are charged at midway stations. It requires short charging time and fast charging speed. Usually, multiple chargers are used in parallel for charging. However, this will cause an overshoot phenomenon during charging, and the overshoot of multiple chargers will be superimposed on the supercapacitor, affecting the stability and life of both supercapacitors and chargers. In this paper, we propose a predictive set point modulation charging method, which can reduce the system’s overshoot and increase the reliability of the system. First, the state-space averaging method is used to establish the electronic physical model of the multicharger system. Secondly, a predictive set point modulation charging control method is designed, and the closed-loop model of the proposed charging system is developed using the buck diagram. The effectiveness of the proposed method is verified through extensive simulation and experiments. The experimental results show that compared with the classical design method, the proposed method can effectively suppress the current overshoot.

scholarly journals Backstepping sliding mode controller improved with fuzzy logic: Application to the quadrotor helicopter

2012 ◽  
Vol 22 (3) ◽  
pp. 315-342 ◽  
Author(s):  
Samir Zeghlache ◽  
Djamel Saigaa ◽  
Kamel Kara ◽  
Abdelghani Harrag ◽  
Abderrahmen Bouguerra
Keyword(s):  
Fuzzy Logic ◽  
Control Method ◽  
Sliding Mode ◽  
Design Method ◽  
Stability And Convergence ◽  
Sliding Mode Controller ◽  
Quadrotor Helicopter ◽  
Nonlinear Control Method ◽  
The Stability ◽  
Yaw Angle

Abstract In this paper we present a new design method for the fight control of an autonomous quadrotor helicopter based on fuzzy sliding mode control using backstepping approach. Due to the underactuated property of the quadrotor helicopter, the controller can move three positions (x;y; z) of the helicopter and the yaw angle to their desired values and stabilize the pitch and roll angles. A first-order nonlinear sliding surface is obtained using the backstepping technique, on which the developed sliding mode controller is based. Mathematical development for the stability and convergence of the system is presented. The main purpose is to eliminate the chattering phenomenon. Thus we have used a fuzzy logic control to generate the hitting control signal. The performances of the nonlinear control method are evaluated by simulation and the results demonstrate the effectiveness of the proposed control strategy for the quadrotor helicopter in vertical flights.

Energy Wave Transmission and Control Analysis in Force Reflection Teleoperation Based on Interconnected Power Line

2011 ◽  
Vol 58-60 ◽  
pp. 1306-1310
Author(s):  
Xiao Hui Xie ◽  
Cui Ma ◽  
Qiang Sun ◽  
Chang Jie Luo ◽  
Ru Xu Du
Keyword(s):  
Control Method ◽  
Power Line ◽  
System Structure ◽  
Communication Link ◽  
Control Analysis ◽  
Practical Application ◽  
New Type ◽  
Transfer Method ◽  
The Stability ◽  
And Control

Force-Reflected Telepresence Teleoperation system has been widely used. Generally, force and torque sensors are installed on the robot to realize haptic perception. Control commands and force-reflected information from the robot are transmitted by communication link, such as internet. However, this structure not only brings difficulties of installation and commissioning, but also reduces the system flexibility and makes control more difficult. And it is prone to interfered in microenvironment. This paper presents a new type of energy transfer method to achieve it by power line instead of internet between the Master-slave Manipulators. This method achieves the consistency of force-reflected without using sensors to measure the conditions. In practical application, it requires to design an energy managed controller to insure the stability and obtain precision in synchronization between the master part and slave part. This paper gives the theory, the system structure and control method of force telepresence teleoperation based on power line.

Study on Grid-Injected System with Regenerative Braking Energy for Subway

2012 ◽  
Vol 516-517 ◽  
pp. 1437-1442
Author(s):  
Qiu Rui Zhang ◽  
Bao Ming Ge ◽  
Da Qiang Bi
Keyword(s):  
Temperature Rise ◽  
Control Strategy ◽  
Control Method ◽  
Design Procedure ◽  
Energy Utilization ◽  
Regenerative Braking ◽  
Resistance Heating ◽  
Urban Rail ◽  
Bus Voltage ◽  
The Stability

At present, the rate of energy utilization is low for the transit regenerative braking on urban rail; most of the energy is consumed by the resistance heating. In this paper, a regenerative braking energy injected-grid device is designed, which makes use of regenerative braking energy and effectively reduce the temperature rise caused by the resistance in the tunnel. The paper describes the composition and the design procedure of regenerative braking energy injected-grid device and presents a control strategy of device. The simulation of the single train model verifies that the stability of DC-bus voltage can be maintained and more power can be feedback to the grid by the proposed device when the train is braking. The feasibility and effectiveness of the proposed control method are validated by the experimental results.

Multiobjective Robust Regulating and Protecting Control for Aeroengines

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
Daren Yu ◽  
Xiaofeng Liu ◽  
Wen Bao ◽  
Zhiqiang Xu
Keyword(s):  
Control Method ◽  
Design Method ◽  
Dynamic Performance ◽  
Switching Control ◽  
Linear Matrix ◽  
Matrix Inequality ◽  
Proportional Integral Derivative ◽  
Engine Control System ◽  
Switching Performance ◽  
The Stability

The multiobjective regulating and protecting control method presented here will enable improved control of multiloop switching control of an aeroengine. The approach is based on switching control theory, the switching performance objectives and the strategy are given, and a family of H∞ proportional-integral-derivative controllers was designed by using linear matrix inequality optimization algorithm. The simulation shows that using the switching control design method not only can improve the dynamic performance of the engine control system but also can guarantee the stability in some peculiar occasions.

scholarly journals Cooperative Control for Multi-Module Charging Systems of Ultracapacitors

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5218
Author(s):  
Xiaoyong Zhang ◽  
Jiaxuan Lei ◽  
Heng Li ◽  
Hongtao Liao ◽  
Jun Peng
Keyword(s):  
Cooperative Control ◽  
Control Method ◽  
Block Diagram ◽  
Current Loop ◽  
Loop Model ◽  
Charging System ◽  
Charging Current ◽  
Long Lifetime ◽  
Laboratory Prototype ◽  
Multiple Module

Ultracapacitors have recently received great attention for energy storage due to their small pollution, high power density, and long lifetime. In many applications, ultracapacitors need to be charged with a high current, where a multi-module charging system is typically adopted. Although the classical decentralized control method can control the charging process of ultracapacitors, there exists a problem that the charging current may be imbalanced among charging modules. In this paper, a cooperative cascade charging method is proposed for the multi-module charging system to reduce the current imbalance among charging modules. First, the state-space averaging method and graph theory are used to model the multiple-module charging system. Second, an effective cooperative cascade control is proposed, where the outer voltage loop stabilizes the output voltage to the desired voltage and the inner current loop guarantees the current of each charger to follow the target current. The block diagram is used to establish the closed-loop model of the charging system. In order to evaluate the proposed charging method, a laboratory prototype was established. Compared with the classical decentralized method, this method can effectively suppress the current imbalance, which is proved by simulation and experimental results.

scholarly journals The Development of a Stair-climbing Robot with Wavy Movement by Rotating Crosses

2002 ◽  
Vol 14 (3) ◽  
pp. 298-303
Author(s):  
Ato Kitagawa ◽  
◽  
Liang Zhang ◽  
Takashi Eguchi ◽  
Hideyuki Tsukagushi ◽  
...  
Keyword(s):  
Simple Structure ◽  
Control Method ◽  
Design Method ◽  
Fire Fighting ◽  
Stair Climbing ◽  
Experimental Result ◽  
Climbing Robot ◽  
New Type ◽  
Fire Fighting Robot

A new type of movement called wavy movement, which is realized by rotating crosses, is proposed to build a stair-climbing fire-fighting robot. The prototype robot consists of 12 crosses, which are driven by 2 motors via sprockets and chains. In this paper, the principle of wavy movement, the mechanism, the design method, and the experimental result of the developed robot are discussed. It is confirmed through experiment that a robot with wavy movement is able to climb stairs with simple structure and easy control method.

A Passive Third-Order Cascade PLL Filter

2011 ◽  
Vol 255-260 ◽  
pp. 2262-2266
Author(s):  
Lin Feng ◽  
Chu Wu ◽  
Bo Jin ◽  
Zhen Yu Wu
Keyword(s):  
Design Method ◽  
Step Response ◽  
Design Parameters ◽  
Frequency Noise ◽  
Third Order ◽  
Loop Filter ◽  
Order Filter ◽  
New Type ◽  
The Stability ◽  
Phase Design

In this paper, the traditional passive loop filter is improved, and a new type of Cascade Third-order filter structure and Graphical Phase Design method is proposed, which greatly simplifies high-order PLL filter’s design, analysis and calculation. According to graphical phase design principle, parameters for cascade third-order filter could be figured out from the given formula, the derived result is simulated in the form of Bode plots and Unit-step response with Pspice software and the loop target under different parameters is compared. Experiments show that this third-order filter could significantly improve the stability of PLL, deeply attenuate the phase detector’s high-frequency noise and is well adapted to the loop gain change. Users can also change the design parameters flexibly according to the system requirements with this filter.

scholarly journals A Passenger Flow Control Method for Subway Network Based on Network Controllability

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Lu Zeng ◽  
Jun Liu ◽  
Yong Qin ◽  
Li Wang ◽  
Jie Yang
Keyword(s):  
Flow Control ◽  
Control Method ◽  
Flow Distribution ◽  
Urban Rail Transit ◽  
Flow Density ◽  
Rail Transit ◽  
System Control ◽  
Flow Network ◽  
Passenger Flow ◽  
Urban Rail

The volume of passenger flow in urban rail transit network operation continues to increase. Effective measures of passenger flow control can greatly alleviate the pressure of transportation and ensure the safe operation of urban rail transit systems. The controllability of an urban rail transit passenger flow network determines the equilibrium state of passenger flow density in time and space. First, a passenger flow network model of urban rail transit and an evaluation index of the alternative set of flow control stations are proposed. Then, the controllable determination model of the urban rail transit passenger flow network is formed by converting the passenger flow distribution into a system state equation based on system control theory. The optimization method of passenger flow control stations is established via driver node matching to realize the optimized control of network stations. Finally, a real-world case study of the Beijing subway network is presented to demonstrate that the passenger flow network is controllable when driver nodes compose 25.3% of the entire network. The optimization of the flow control station, set during the morning peak, proves the efficiency and validity of the proposed model and algorithm.

Study on the Coordination between Urban Rail Transit and Bus

2011 ◽  
Vol 255-260 ◽  
pp. 4085-4089 ◽  
Author(s):  
Yu Ping Wang ◽  
Chao Qun Ma
Keyword(s):  
Full Advantage ◽  
Design Method ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Transport Capacity ◽  
Urban Rail ◽  
Guiding Principles ◽  
Transfer Channels

To take full advantage of urban rail transit (URT), it needs the cooperation of bus from capacity, station spacing, network, and hub. The compute method to match transport capacity was brought forward. In addition, based on minimal traveling time, the optimum station spacing between bus and URT was determined. And the guiding principles are formulated for the restructuring and optimization of the networking system for public buses and URT. Finally, hubs between URT and bus were classed three sub-grades, and their layout was planned, and the design method of transfer channels method was proposed.

Sign in / Sign up

Export Citation Format

Share Document