scholarly journals Analysis of the different locomotive wireless multi-traction synchronous control systems for heavy-haul combined trains and their performance

2020 ◽  
Vol 2 (3) ◽  
pp. 202-215
Author(s):  
Wei Li ◽  
Chunyang Chen ◽  
Hui Li ◽  
Kai Wang ◽  
Liang Xie ◽  
...  
Keyword(s):  
Control System ◽  
Control Systems ◽  
Information Transfer ◽  
Optimization Strategy ◽  
Traction Control ◽  
Synchronous Control ◽  
Train Control ◽  
Different Types ◽  
Markov Decision ◽  
Heavy Haul

Abstract This paper looks at the heavy-haul combined train composed of different types of locomotives and its distributed power control system with a combination of 800 MHz and TD-LTE wireless communication. It analyses some key characteristic parameters that affect the synchronism and communication of the differential wireless multi-traction synchronous control systems for heavy-haul combined trains. At the same time, in order to reduce the latency of instruction and information transfer between different types of locomotives, improve the time-limit certainty of wireless transmission and optimize the control quality of multi-traction control systems for heavy-haul combined trains, a synchronism optimization strategy based on the Markov decision process on the basis of Petri networkconstruction is proposed. Relevant experiments and tests are carried out to verify the effectiveness of the synchronism optimization of the control system, which provides a guarantee for improving the differential wireless multi-traction synchronous control system for combined trains and optimizing train control.

scholarly journals The Study of Interoperability Test for Onboard Control System in Railway Condition

2011 ◽  
Vol 2-3 ◽  
pp. 785-790
Author(s):  
Jong Hyen Baek ◽  
Yong Kyu Kim ◽  
Jae Ho Lee ◽  
Hyen Jung Jo
Keyword(s):  
Control System ◽  
Control Systems ◽  
Data Systems ◽  
Test Results ◽  
Simulation Environment ◽  
Train Control ◽  
Interoperability Test ◽  
Critical Characteristics ◽  
Site Test ◽  
Onboard Equipment

For the purpose of improving the future domestic train control systems and securing interoperability, according to the global development trends of train control systems, it is presented that the test results of interoperability between wayside train control systems installed in existed line, and the onboard train control system. Due to the safety-critical characteristics of train systems, the site test in the section where the wayside equipment is installed may lead to a danger against safety. Therefore, by way of constructing a simulation environment of train control systems, the T/R data systems of the equipment for interoperability are confirmed and the interoperability test are obtained by applying these systems to onboard equipment.

Simplified and advanced modelling of traction control systems of heavy-haul locomotives

2015 ◽  
Vol 53 (5) ◽  
pp. 672-691 ◽  
Author(s):  
Maksym Spiryagin ◽  
Peter Wolfs ◽  
Frank Szanto ◽  
Colin Cole
Keyword(s):  
Control Systems ◽  
Traction Control ◽  
Heavy Haul

scholarly journals Scheduling Algorithm for Real-Time Embedded Control Systems using Arduino Board

2017 ◽  
Vol 2 (2) ◽  
pp. 258
Author(s):  
Gokul Sidarth Thirunavukkarasu ◽  
Ragil Krishna
Keyword(s):  
Control System ◽  
Control Systems ◽  
Real Time ◽  
Error Detection ◽  
Scheduling Algorithm ◽  
Performance Ratio ◽  
Control Logic ◽  
Train Control ◽  
Train Control System ◽  
Time Scheduling

The time taken for the scheduling task in a control system to reduce the traffic within the system is one of significant field of research in modern era. There are different control systems that require time scheduling such as elevator control system, traffic control system and train control system. Currently, there are unique control logic strategies adopting scheduling algorithm that are implemented in real time systems like earliest deadline first and ant colony optimization. At the same time, the disadvantages possessed by them are the exponential dip in the performance ratio due to over loading. Despite of all the available resources there are many issues faced such as congestion in traffic networks due to non-adaptive scheduling algorithms, etc., which led to several misfortunes and danger for human life. Hence an improved algorithm that increases the efficiency of the system is required to validate the processing time and the deadlines. Our research is focused on validating a proposed idea of using Arduino microcontroller to implement the different scheduling tasks and validate the efficiency of the algorithm to optimize the results of the system. This take cares of assigning the critical paths which priorities the tasks and focuses on reducing the scheduling time. This rapidly increases the processing speed and efficiency of the algorithm. We plan to use the Arduino board which has an inbuilt error detection algorithm that helps in checking whether the time scheduling is done effectively. In the initial phase of the project we develop and fabricate the hardware design using CAD design software packages like Solid Works. This is later employed with suitable environmental interfaces like, sensors and microcontrollers that can work in an adaptable environment as per requirements to validate the scheduling algorithm. The scheduling algorithm can also be used for controlling the current flow and power storage which will contribute a lot in the power consumption aspect. Graphical data interpretation of various algorithms from the past literature is observed and few selected ones are to be implemented in the experimental set up that is built as an initial proof of concept. By analyzing the results from the simulations carried out using the Altera FPGA board with VHDL and Arduino it is clear that we obtain better results using the Arduino board. Finally, to have an extensive study on different intelligent control logics that are used in the above mentioned control systems, we use the prototyped miniature model of an elevator system and a train control system to validate the different disk scheduling approaches like First Come-First Serve (FCFS), Elevator (SCAN) and ant colonization to solve the discrete combinational optimization of the scheduling logic. Initial validation of the system focuses on the effectiveness of using the ant colonization strategies to enhances the efficiency of the scheduling algorithm and optimize it for real time application.

scholarly journals NFC based inventory control system for secure and efficient communication

2014 ◽  
Vol 3 (1) ◽  
pp. 23-33 ◽  
Author(s):  
Razi Iqbal ◽  
Awais Ahmad ◽  
Asfandyar Gilani
Keyword(s):  
Control System ◽  
Control Systems ◽  
Inventory Control ◽  
Short Range ◽  
Near Field ◽  
Smart Phone ◽  
Ease Of Use ◽  
Near Field Communication ◽  
Efficient Communication ◽  
Different Types

This paper brings up this idea of using Near Field Communication (NFC) for inventory control system instead of using traditional barcodes. NFC because of its high security, ease of use and efficiency can be very suitable for systems like inventory control. In traditional inventory control systems, each product has a barcode pasted on it, which is vulnerable to attacks as barcodes are open and have no security. Furthermore, barcodes are prone to damages and can be unreliable when pasted on different types of products e.g. hot and frozen products, circular shaped products and irregular shaped products like clothes etc. NFC on the other hand is very efficient, secure and reliable when it comes to short-range wireless communication. In this paper we will present our prototype for the inventory control system of an electronic store in which each product has a passive NFC tag pasted to it. When a customer buys a product the receipt of the product is generated using NFC between the NFC passive tag on the product and NFC enabled device (e.g. smart phone or reader) at the cash counter.

CONTROL SYSTEMS WITH TRANSPORT DELAY

2020 ◽  
Vol 70 (4) ◽  
Author(s):  
Ahmed Kula ◽  
Georgi Ruzhekov
Keyword(s):  
Control System ◽  
Time Delay ◽  
Control Systems ◽  
Real Time ◽  
Hybrid System ◽  
Reference Object ◽  
Transport Delay ◽  
Scada System ◽  
Different Types ◽  
Estimation Of Time

A hybrid system is being developed. The plant is realized in MATLAB, works in real time. The control system uses an industrial controller and a SCADA system. Estimation of time-delay, modelling of reference object and autotune is performed. The developed hybrid system gives opportunities for research different types of regulators for plants with big time-delay.

Petri Net-Based Modeling and Verification of Automatic Train Speed Control System

2014 ◽  
Vol 571-572 ◽  
pp. 395-399 ◽  
Author(s):  
Rong Hua ◽  
You Fu ◽  
Jian Zhi Yu ◽  
Cong Liu
Keyword(s):  
Control System ◽  
Petri Nets ◽  
Control Systems ◽  
Petri Net ◽  
Formal Model ◽  
Speed Control ◽  
Train Control ◽  
Train Control System ◽  
Speed Control System ◽  
Train Speed

How to provide dependability based on safety is a challenge faced by train control system. Formal approaches are important for modeling and verification of automatic speed control Systems. In the paper, a formal model of automatic speed control Systems based on Petri nets (ASCS-nets) is presented. And the transformation approaches from automatic train speed control system to ASCS-nets are given. Correctness verification of automatic train speed control system is implemented based on ASCS-nets model.

scholarly journals Cryptographic information protection in distributed control systems

2019 ◽  
Vol 2019 (1) ◽  
pp. 41-48
Author(s):  
Наталия Суханова ◽  
Nataliya Sukhanova
Keyword(s):  
Control System ◽  
Control Systems ◽  
Distributed Control ◽  
Information Transfer ◽  
Communication Channels ◽  
New Method ◽  
Distributed Control System ◽  
Information Protection ◽  
Open Communication ◽  
Private Key

The structure of the distributed control system (DCS) is considered. A problem for information protection which is transferred between the units of the DCS is specified. For information transfer there are used open communication channels. A new method for a cryptographic protection of information with the aid of the method of block encoding with a private key is offered.

scholarly journals Synchronous control system based on wireless data transmission for 50,000-t heavy-haul trains

2018 ◽  
Vol 10 (7) ◽  
pp. 168781401878482 ◽  
Author(s):  
Shize Huang ◽  
Fan Zhang ◽  
Qiyi Guo ◽  
Decun Dong
Keyword(s):  
Control System ◽  
Wireless Data ◽  
Synchronous Control ◽  
Technical Requirements ◽  
Severe Accidents ◽  
Wireless Data Transmission ◽  
Heavy Haul Train ◽  
Heavy Haul ◽  
Brake Force ◽  
Heavy Haul Trains

In order to meet the ever-increasing freight capacity demand, operation of heavy-haul freight trains with a 50,000 t capacity has been widely studied for a decade in China. A typical heavy-haul train with a large capacity employs multiple locomotives that are evenly distributed along the train, and each locomotive, or two or more locomotives, hauls a certain amount of freight cars. The synchronicity among locomotives is of great importance to safety. A 50,000-t train developed in China will be pulled by 10 locomotives, and the uneven distribution of traction or brake force, caused by the asynchronous command execution of different locomotives, could eventually lead to severe accidents such as decoupling. This article focuses on how to apply the existing wireless-based multi-locomotive synchronous control system to the trains with the capacity of 50,000 t. The modular functionality of the control system is introduced, and some methods aiming to enhance the reliability of wireless communication are discussed. Then four experiments conducted on real trains or in laboratory are described. Test results show that the wireless synchronous control system can meet the technical requirements of 50,000-t trains and its operation is feasible.

Online Controller Setpoint Optimization for Traction Control Systems Applied to Construction Machinery

2018 ◽  
Author(s):  
Addison Alexander ◽  
Annalisa Sciancalepore ◽  
Andrea Vacca
Keyword(s):  
Control System ◽  
Control Systems ◽  
Real Time ◽  
Controller Design ◽  
Optimization Technique ◽  
Parameter Tuning ◽  
System Model ◽  
Model Parameters ◽  
Time Data ◽  
Traction Control

The development of a suitable traction control system for off-road heavy machinery is complicated by several different factors, which differentiate these machines from typical on-road systems. One such difficulty arises from the fact that they are often operated on ground conditions which can vary widely and rapidly. Due to this, traction control systems designed for these vehicles must be robust to a large array of surface types, and they must be capable of reacting quickly to significant changes in those types. In order to accomplish this, this paper proposes an online parameter optimization technique suitable for tuning the setpoint of a control system to maximize the tractive potential of a construction vehicle in real time. The traction control principle itself is based on selectively braking wheels which are slipping. It also attempts to account for the interactions of the transmission systems that deliver power from the engine to the wheels. This research uses a wheel loader as a reference machine for assessing controller performance. Drawing on previous work in simulation and controller design, a system model was developed which incorporates the vehicle dynamics of the machine as well as the behavior of the electrohydraulic brakes. This system model was leveraged to understand the effect of different optimization schemes on the performance of the traction control. The self-tuning algorithm is based on a compound optimization method utilizing both a system identification component and a parameter tuning component. The first part optimizes the model parameters to fit it as well as possible to measured slip-friction data. Based on the results of this, the second part draws from theories of wheel traction to maximize a balance of pushing force and traction effectiveness. The result is a method which can achieve the proper setpoint based on real-time data describing the ground condition. This system was run first in simulation and then on a modified vehicle system. In both cases, the algorithm allows the controller to find better setpoints to improve the traction control performance online.

Sign in / Sign up

Export Citation Format

Share Document