80 Questions
What is the purpose of the Stationary unit of TCAS?
To generate Movement Authority and transmit it to the train via radio
What is the purpose of RFID Tags in TCAS?
To correct the accumulated odometry error
What is the role of the on-board computer in TCAS?
To compare the train speed with the permitted speed and command brake application
How does the Stationary unit of TCAS identify individual trains?
By the identity of its leading TCAS on-board equipment
What is the purpose of the trackside equipment in TCAS?
To perform train detection and train integrity supervision
How is the Movement Authority transmitted to the train in TCAS?
Via UHF/GSMR/LTE radio together with speed information and track description data
What is the purpose of the DMI in the onboard unit of TCAS?
To assist Loco Pilots by means of real-time display of the aspect of approaching signal
What is the benefit of multi-vendor interoperability in TCAS?
To enable communication between different vendors' systems
What is the primary intention of TCAS?
To prevent collisions and control speed at tracks having speed restrictions
What is the main feature of Automatic Train Protection (ATP) in IRATP?
Detection and prevention of SPAD and cab signalling
What is the function of RFID Tag in IRATP?
To communicate with stationary units
What is the purpose of the On Board Computer (OBC) in IRATP?
To process and analyze train data
What is the function of the Train Interface Unit (TIU) in IRATP?
To connect the OBC to the brake control system
What is the purpose of the Pulse Generators (Speed Sensors) in IRATP?
To measure train speed and acceleration
What is the primary function of the Driver Machine Interface (DMI) in IRATP?
To display movement authority and target distance
What is the purpose of the Loco Radio Unit in IRATP?
To communicate with the stationary unit
What is the primary function of the Traffic Management System (TMS) in the context of train operation?
To provide real-time monitoring of train traffic for efficient decision making
What is the relationship between CTC and TMS?
CTC is a subset of TMS
What is the purpose of the Service brake command in TCAS?
To calculate simulated braking distance
What is the primary function of the Driver Machine Interface (DMI) of TCAS?
To provide a user interface for the driver
What is the purpose of the Emergency brake command in TCAS?
To initiate maximum braking in emergency situations
What is the benefit of Automatic Route Setting (ARS) in TMS?
It reduces the workload of the train controller
What type of reports can be generated by the TMS system?
Various MIS reports, train graphs, and alarms
What is the primary function of the Normal brake command in TCAS?
To initiate normal braking
What is the primary consideration for designing and planning the system for data transport between stations or OCC to stations?
Ensuring simultaneous data transport without delay, jitter, or packet drop
What is the requirement for voice communication in the system?
Integrated digital voice communication with voice logging facility
What is the significance of RDSO specification for Advanced Auxiliary Warning System (AAWS)?
It is a specification for suburban sections of Central and Western Railways
What is annexure 13-A1 in the chapter on ATP, ETCS, IRATP (TCAS) & TMS?
Braking Distance Calculations for TCAS
What is the chapter that includes Annexure 13-A1 and Maintenance Schedules in Appendix I?
Chapter 13: ATP, ETCS, IRATP (TCAS) & TMS
How many Maintenance Schedules are included in Appendix I of Chapter 13?
3
What is the purpose of the maintenance schedules in Appendix I of Chapter 13?
To outline the maintenance procedures for Train Protection & Warning System (TPWS), Train Collision Avoidance System (TCAS), and Centralized Traffic Control (CTC)
What is the significance of Chapter 13 in the context of train safety?
It outlines the maintenance procedures for train protection systems
What is the primary function of balises in the ETCS system?
To act as reference points and correct accumulated odometry error
What is the purpose of the on-board computer in ETCS Level 2?
To compare the train speed with the permitted speed
What is a feature of ETCS Level 2?
It accommodates regenerative braking
What is the purpose of the Driver Machine Interface (DMI) in ETCS?
To display objects in speed and supervision areas
What is the name of the Automatic Train Protection System developed by Indian Railways?
TCAS
What is a feature of TCAS?
It has cab signalling features
What is the relationship between IRATP and TCAS?
Both terms are used synonymously
What is NOT a feature of ETCS Level 2?
It requires line side signals
What is NOT a feature of TCAS?
Route Optimization
What is a feature of Automatic Train Protection (ATP) in IRATP?
Detection and Prevention of SPAD
What is a feature of IRATP?
Detection and Prevention of SPAD
What is NOT a Train Collision Avoidance Feature?
Route Optimization
What is NOT an on-board equipment of IRATP?
Route Optimization System
What is a feature of IRATP track side equipment?
RFID Tag
What is NOT a function of the DMI in IRATP?
Route Optimization
What is a feature of TCAS?
Detection of roll back
What is the primary consideration for designing and planning the system for data transport between stations or OCC to stations?
Avoiding delay or jitter or drop in packets
What is the significance of voice communication in the system?
Integrated digital voice communication with voice logging facility
What is the purpose of Annexure 13-A1 in the chapter on ATP, ETCS, IRATP (TCAS) & TMS?
Braking Distance Calculations for TCAS
What is the relationship between CTC and TMS?
CTC is a subset of TMS
What is the significance of RDSO specification for Advanced Auxiliary Warning System (AAWS)?
It is a new generation system
What is the primary function of the maintenance schedules in Appendix I of Chapter 13?
To plan maintenance activities
How many Maintenance Schedules are included in Appendix I of Chapter 13?
3
What is the significance of Chapter 13 in the context of train safety?
It provides details on ATP, ETCS, IRATP (TCAS) & TMS
What is the primary function of the Traffic Management System (TMS) in the context of train operation?
To provide centralized operation of signalling systems for a large section
What is a key feature of the Traffic Management System (TMS)?
Automatic Route Setting (ARS) and Long Route Setting
What is the relationship between CTC and TMS?
CTC is a subset of TMS
What is the purpose of the Emergency brake command in TCAS?
To apply brakes in emergency situations
What is the benefit of Automatic Route Setting (ARS) in TMS?
Reducing the workload of the controller
What type of reports can be generated by the TMS system?
MIS reports and Train Graph
What is the primary function of the Service brake command in TCAS?
To apply service brakes in normal situations
What is the primary function of the Normal brake command in TCAS?
To apply normal brakes in normal situations
Which component of TCAS is responsible for providing real-time display of the aspect of approaching signal?
DMI of the onboard unit
How does the Stationary unit of TCAS identify individual trains?
By the identity of its leading TCAS on-board equipment
What is the purpose of the Pulse Generators in TCAS?
To determine the train's position
What is the benefit of bi-directional track train communication in TCAS?
Improved safety and efficiency
How does the Stationary unit of TCAS supervise train movements?
Continuously in its territory
What is the purpose of the RFID Tags in TCAS?
To correct the accumulated odometry error
What is the benefit of multi-vendor interoperability in TCAS?
Increased flexibility and compatibility
What is the primary function of the on-board computer in ETCS Level 2?
To continuously compare the train speed with the Permitted speed
What is the purpose of the Movement Authority in TCAS?
To authorize the train to move within a certain section of track
What is the purpose of the balises in ETCS?
To act as reference points and correct the accumulated odometry error
What is the significance of the Driver Machine Interface (DMI) in ETCS?
It is used to provide the driver with a user-friendly interface
What is the primary function of the Level-2 system in ETCS?
To supervise the train's speed and apply the brake if necessary
What is the relationship between IRATP and TCAS?
IRATP and TCAS are synonymous terms
What is the purpose of regenerative braking in ETCS Level 2?
To reduce the energy consumption
What is the significance of the two levels of brake commands in ETCS Level 2?
They provide a higher degree of safety
What is the primary function of the Line side signals in ETCS?
To provide the driver with a visual indication of the permitted speed
Study Notes
TCAS (Train Collision Avoidance System)
- Three levels of brake commands in TCAS: Normal brake command, Service brake command, and Emergency brake command
- Simulated Braking Distance Calculations for service and emergency brakes are provided in Annexure: 13-A1
Driver Machine Interface (DMI) of TCAS
- A typical overall view of DMI is shown, with features such as:
- Real-time display of the aspect of approaching signal
- Assistance to Loco Pilots by means of real-time display
Traffic Management System (TMS)
- TMS carries out the following functions:
- Centralized Operation of Signalling Systems
- Centralized Real-time Monitoring of Train Traffic
- Interfacing and real-time data sharing with COA, Crew management system, PA system at station, ATP, etc.
- Automatic route setting (ARS), Long route setting, and Route stacking command
- Generation of various MIS reports, train graphs, and detection and management of alarms and logs
TCAS Features
- Based on inputs received from Signalling interlocking, the Stationary unit of TCAS generates Movement Authority which is transmitted to the train via radio
- TCAS provides bi-directional track-train communication
- Train movements are supervised continually by the Stationary unit in its territory
- The Stationary unit knows each TCAS controlled train individually by the identity of its leading TCAS on-board equipment
- Movement authority is transmitted to the vehicle continuously via UHF/GSMR/LTE radio together with speed information and track description data
Safety Concerns
- Two major areas of safety concern are:
- LC gate Accidents
- Signal Passing at Danger (SPAD)
- TCAS is intended to provide train protection by addressing:
- Prevention of collisions
- Control of speed at tracks having speed restrictions
ATP (Automatic Train Protection) Features of IRATP
- Detection and Prevention of SPAD
- Cab signalling with Display of movement authority, target distance, speed, and signal aspect
- Continuous train control
- Protection for speed restriction
- Detection of roll back
- Blowing horn while approaching Level Crossing Gate
Train Collision Avoidance Features
- Head-On Collision prevention
- Rear End Collision prevention
- Side Collision prevention
Track-side Equipment of IRATP
- RFID Tag
- Stationary unit
- Radio
On-board Equipment of IRATP
- On-Board Computer (OBC)
- RFID readers
- Driver Machine Interface (DMI)
- Loco Radio Unit
- Pulse Generators (Speed Sensors)
- Train Interface Unit (TIU)
- Interface to existing brake control system
- Power supply arrangement
- Isolation arrangement
TCAS (Train Collision Avoidance System)
- Three levels of brake commands in TCAS: Normal brake command, Service brake command, and Emergency brake command
- Simulated Braking Distance Calculations for service and emergency brakes are provided in Annexure: 13-A1
Driver Machine Interface (DMI) of TCAS
- A typical overall view of DMI is shown, with features such as:
- Real-time display of the aspect of approaching signal
- Assistance to Loco Pilots by means of real-time display
Traffic Management System (TMS)
- TMS carries out the following functions:
- Centralized Operation of Signalling Systems
- Centralized Real-time Monitoring of Train Traffic
- Interfacing and real-time data sharing with COA, Crew management system, PA system at station, ATP, etc.
- Automatic route setting (ARS), Long route setting, and Route stacking command
- Generation of various MIS reports, train graphs, and detection and management of alarms and logs
TCAS Features
- Based on inputs received from Signalling interlocking, the Stationary unit of TCAS generates Movement Authority which is transmitted to the train via radio
- TCAS provides bi-directional track-train communication
- Train movements are supervised continually by the Stationary unit in its territory
- The Stationary unit knows each TCAS controlled train individually by the identity of its leading TCAS on-board equipment
- Movement authority is transmitted to the vehicle continuously via UHF/GSMR/LTE radio together with speed information and track description data
Safety Concerns
- Two major areas of safety concern are:
- LC gate Accidents
- Signal Passing at Danger (SPAD)
- TCAS is intended to provide train protection by addressing:
- Prevention of collisions
- Control of speed at tracks having speed restrictions
ATP (Automatic Train Protection) Features of IRATP
- Detection and Prevention of SPAD
- Cab signalling with Display of movement authority, target distance, speed, and signal aspect
- Continuous train control
- Protection for speed restriction
- Detection of roll back
- Blowing horn while approaching Level Crossing Gate
Train Collision Avoidance Features
- Head-On Collision prevention
- Rear End Collision prevention
- Side Collision prevention
Track-side Equipment of IRATP
- RFID Tag
- Stationary unit
- Radio
On-board Equipment of IRATP
- On-Board Computer (OBC)
- RFID readers
- Driver Machine Interface (DMI)
- Loco Radio Unit
- Pulse Generators (Speed Sensors)
- Train Interface Unit (TIU)
- Interface to existing brake control system
- Power supply arrangement
- Isolation arrangement
This quiz covers the basics of TCAS, including brake commands and driver machine interface. It is a part of the chapter on ATP, ETCS, IRATP, and TMS.
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