On July 30, the first train of the west section of Beijing Metro Line 11 (hereinafter referred to as “Beijing Line 11”) was delivered at Hebei Manufacturing Workshop of RTTE. Guests from government and customers, jointly witnessed the first train rolling off the assembly line. The guests who participated in the ceremony also had a trial ride to experience the whole-new vehicle, and visited the manufacture workshop.
The west section of Beijing Metro Line 11 is located in Shijingshan District, starting from Moshikou Station in the north and Xinshougang Station in the south with the length of 4.2km, 4 stations. The aluminum alloy train‘s configuration is 4 vehicles of 3 motors and 1 trailer. The maximum operating speed is 100 km/h, which can realize fully automatic operation. The entire vehicle adopts Ethernet control, and the train is equipped with intelligent obstacle detection and derailment detection, prognostics and health management system (PHM), and intelligent passenger service system.
Highlight 1: Fully Automatic Driving Technology Escorts Safety
Fully Automatic Driving
The train can realize fully automatic driving without driver’s operation under all scenarios. From vehicle self-checking out and leaving the depot to mainline operation, from the off-mainline car washing to the evening return to the depot, the automatic operation without human intervention can be realized according to the predetermined plan. Fully automatic operation uses advanced signal and vehicle technology to achieve precise control of the train position on the whole line, avoid possible errors in human operation, and maximize the safe operation of vehicles.
Intelligent Detection Equipment
The vehicle wholly implements the concept of safety in the configuration of intelligent detection equipment. The vehicle is equipped with obstacle and derailment detection equipment, and 3C detection equipment for pantograph-catenary to monitor the safety status in real time. Once a hidden danger occurs, the corresponding equipment will take corresponding measures as soon as possible, and report to the control center to coordinate with station personnel for emergency treatment.
Highlight 2: Accompanying “Doctor” Onboard, Safe and Reliable Vehicle
Prognostics and Health Management System
For the first time, the train is equipped with a “vehicle prognostics” and health management system for Beijing metro, realizing the successful implementation of intelligent train operation and maintenance technology. The propulsion system, braking system, air conditioner, car door, pantograph and other systems are all connected to the health management system, and the data collected by a large number of sensors are sent to the ground expert system through the vehicle-ground wireless transmission for data analysis and processing. Fault warning and life prediction will be made to realize the assessment of the health status, and provide more accurate data support for the vehicle to change from maintenance by plan to maintenance by status.
Advanced Intelligent Information Technology to Improve Reliability
The train adopts a comprehensive bearer network to integrate a large number of terminal equipment in the train, and integrates the original train control network, train maintenance network and health management network to achieve multi-network integration. The integrated bearer network adopts industrial large-bandwidth Ethernet, which reduces vehicle wiring, the number of interfaces, implements the lightweight and intelligent design concept, and realizes data standardization, and effective sharing.
Relying on the “doctor” accompanying onboard to conduct “physical examination” on the vehicle at all times to prevent hidden dangers beforehand, the vehicle runs more reliably, and passengers can travel more assured.
Highlight 3: Intelligent Services, Optimized Travel Experience
Smart 5G network
The train adopts the world’s first 5G wireless communication system, EUHT, that supports high-definition CCTV transmission (more than 30 channels), CBTC, passenger information display system and other services to achieve efficient transmission at the same time. Its transmission capacity is 10 times that of traditional wireless communication technology. With the help of EUHT, the entire vehicle’s video surveillance can be transmitted to the ground control center in real time, ensuring that the ground commander can grasp the situation in the vehicle in time in emergencies.
Train intelligent perception function
The high-performance transmission network empowers smart trains, provides passengers with a higher level of service, and adds a series of functions to improve train comfort. In order to realize omni-directional vehicle information perception and improve the level of intelligent vehicle perception and information processing, the trains have added a large number of sensors in each subsystem. The dynamic map display screen in the car can automatically adjust the display brightness according to the intensity of the lighting in the car to better protect the eyesight of the passengers; the congestion degree display function of the car provides passengers with guidance, and the station layout and car position are displayed on the dynamic map. Passengers can leave the station and transfer quickly; convenient one-key assistance device can realize emergency video intercom between passengers and the driver or control center when an emergency occurs in the car; the air conditioning system can be adjusted based on the environment temperatures and passenger load factors of the saloon in different seasons and different operating scenarios; the function of constant temperature control in the saloon are controlled by variable frequency PID control strategy. It also integrates the function of plasma low-temperature air purification to disinfect and sterilize the air in the saloon and effectively improve the quality of passenger travel.
Highlight 4: Energy Saving and Environmental Protection, Enjoying a Green Life
Application of environmentally friendly materials
The design of the train fully adheres to the concept of sustainable development, and does its utmost to reduce waste output and avoid environmental pollution from design material selection, application process and waste recycling. The interiors and exteriors of the vehicle use environmentally friendly water-based paint, and the LED lighting source uses materials that have a long service life and are free of lead and mercury pollution.
In order to achieve energy saving and emission reduction in vehicle operation, the lightweight design of vehicles runs through the whole process. The aluminum alloy body is 1.5 tons lighter than the stainless steel body, and the LED lighting system and inverter air conditioning units have introduced energy-saving measures. At the same time, the propulsion system has an efficient electric braking function, which can not only recover a large amount of electric energy during braking and feed it back to the grid, but also reduce the wear of the brake shoes.