Description
ALSTOM CMP1838TRVCO62345000
Alstom is responsible for its SelTrac ™ A core onboard controller developed for the CBTC (Communication Based Train Control) system.
1. Product Overview
Product Name: CMP1838 On Board Controller or Vehicle On Board Computer (VOBC)
Manufacturer: Alstom
System: SelTrac ™ Mobile Block Train Control System
Main function: To achieve automatic protection (ATP), automatic operation (ATO), and automatic monitoring (ATS) functions of the train, which is a key onboard equipment of the CBTC system.
2. Main functions and roles
Automatic Train Protection (ATP):
Security Core: Continuously calculate the safe operating speed and Movement Authority (MA) endpoint of the train.
Overspeed protection: Real time monitoring of train speed to ensure that it never exceeds the safe speed limit. If the train exceeds the speed limit, it will automatically trigger emergency braking.
Collision protection: Ensure that the train maintains an absolutely safe distance from the preceding vehicle to prevent rear end accidents.
Automatic Train Operation (ATO):
Autonomous driving: Under the protection of ATP, the traction (acceleration) and braking (deceleration) of the train are automatically controlled to achieve smooth and energy-saving inter station operation.
Precise parking: Control the train to stop precisely at the station platform (usually within ± 0.3 meters), making it convenient for passengers to get on and off the train.
Car door control: It is linked with the platform screen door/safety door system to achieve automatic and safe opening and closing of the car doors.
Automatic Train Supervision (ATS):
3. Technical features
Powerful processing capability: capable of real-time processing of large amounts of positioning data, speed data, and communication information from trackside devices, performing complex logical operations to make millisecond level safety decisions.
Modular design: easy to maintain, diagnose faults, and replace compone
4. Typical applications
Company Name: Alstom
Established in 1928
Headquarters: Saint Ouen, France
Business scope: A large diversified industrial group that primarily develops and sells systems, equipment, and services for the transportation sector worldwide (Europe, America, Asia Pacific, Middle East, and Africa). 
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