There is something wrong with the emergency braking of the urban rail train. How does the related system operate?

Review summary data II. Urban rail transit generally consists of vehicles and depot equipment, power supply equipment "traction power supply system, catenary (track), power monitoring system", lines (track), communication, signal, station equipment monitoring, disaster prevention alarm, gas fire extinguishing, environmental control, escalators, screen doors, automatic fare collection and other equipment and systems. 3.★ The first subway in the world was opened in London on 1863, with a total length of 6.2km.4.. ★ The first subway in China was completed and opened to traffic in Beijing on June 1969 10, with a total length of 24. 17km. 5.★ Urban rail transit lines are divided into main lines and auxiliary lines (including turn-back lines, parking lines, crossing lines, contact lines, safety lines, and access lines of depots, etc. ) and parking lots are operated according to their functions. 6. The projection of the center line of the line on the horizontal plane is called the plane of the line, which can reflect the change of the curve direction of the line; The projection of the center line of the line on the vertical plane is called the longitudinal section of the line, which can reflect the slope change of the line. 7. The maximum gradient of the main line should not exceed 30‰. 8. The role of rail is to support and guide the wheels of rolling stock and provide a loop. 9. The main line, auxiliary line and test line shall adopt all kinds of turnouts not less than No.9, and the throat area of station line shall adopt all kinds of turnouts not more than No.7 .. 10.★ The included angle between the two acting sides of the fork center is called fork retreat angle α, and the number of turnouts n=ctgα. If the number is large, the included angle is small, and the lateral passing speed is fast; if the number is small, the included angle is large, and the lateral passing speed is slow. (The number of turnouts is inversely proportional to the included angle and directly proportional to the transverse passing speed) 1 1. ★ Horizontal and vertical offset and deflection angle achieved under static and dynamic conditions. 12.★ The station is divided into underground station, ground station and elevated station by location; According to the operation function, there are intermediate stations, transfer stations, regional stations and terminal stations. 13.★ The platform form of subway station can be island platform, side platform and island-side mixed platform. 15.★ Urban rail transit vehicles are mainly divided into A-type vehicles, B-type vehicles, C-type vehicles, L-type vehicles, rubber-tyred vehicles, trams and low-floor light rail vehicles. Among them, a car with a width of 3.0m is called Type A, a car with a width of 2.8m is called Type B, and a car with a width of 2.6m is called Type C.. Nanjing urban rail transit vehicles 1 and Line 2 all adopt Type A vehicles. 16.★ Classification of couplers: (1) Automatic couplers; (2) semi-automatic coupler; (3) Semi-permanent traction rod. 17.★ The bogie is an operating device that supports the car body and its load and guides the vehicle to run along the track. 18.★ Main functions of bogies: (1) support the car body and transmit loads; (2) Make the vehicle pass the curve smoothly; (3) transmitting traction and braking force; ⑷ Reduce vibration and impact, and improve ride comfort. 19. Bogies of urban rail transit vehicles are mainly divided into power bogies and non-power bogies, which are also called motor car bogies and trailer bogies respectively. 20. The main function of suspension system is to reduce and attenuate the vibration and impact of vehicles, and improve the driving stability of vehicles and the comfort of passengers. 2 1.★ The vehicle traction system consists of pantograph, high-speed circuit breaker (hscb), vvvf traction inverter, traction control unit (dcu/unas), traction motor, braking resistor and grounding carbon brush. 22. The basic working principle of traction system is to convert high-voltage DC from catenary (rail) into three-phase AC with adjustable frequency and voltage through inverter, and supply it to traction motor for driving. 23.★ Braking type: (1) electric braking; ① Regenerative braking; ② Resistance braking. (2) Air (friction) braking. 24. The task of the auxiliary system is to change the high-voltage DC of the power grid into AC 50hz, AC 380v, AC 220v and DC 1 10v power supply. 25. Passenger Information Display System (PIDS); Pids consists of three parts: train broadcasting system, media system and dynamic map, which provides all functions of train broadcasting, driver intercom, passenger emergency alarm and direct communication between occ and cab. 26.★ The route that the train or locomotive runs on the track line is called the route. Determine the opening direction of the routing switch. 27.★ The equipment that controls the above-mentioned turnouts, routes and signals and realizes their interlocking is called station interlocking equipment, which is referred to as station interlocking for short. 28.★ The automatic signal system consists of atp/ato, interlocking and ats subsystems. The main function of automatic train protection (atp) subsystem is to monitor and control the train running in a safe state, which should meet the fail-safe principle. Automatic Train Driving (ato) subsystem is the equipment that automatically controls the train operation. Under the protection of atp, it can automatically control the start, traction, cruise, idling and braking of the train, and ensure the design interval and travel speed. Automatic Train Monitoring (ats) subsystem is the central system of train monitoring, which completes the automatic management and monitoring of the whole train operation with the support of atp subsystem. In the station section with turnout, interlocking equipment is a safety equipment to realize the correct interlocking relationship and route control among turnout, signal and track circuit. 29.★ There are three ways to block the urban rail transit system: fixed block, quasi-mobile block and mobile block. 30.★ Red light-no traffic; Street lamp-the approach road is idle, and the approach road is switched on; Yellow light-the route is idle, and the turnout in the route is open sideways; The yellow light+red light guide signal passes through 3 1 at a speed of 25 km/h. ★ The function of the communication system is to effectively transmit voice, data and images related to the operation, maintenance and management of rail transit. 32.★otn means open transmission network. 33.★ The official and station telephone system can be divided into two parts: the official telephone subsystem and the in-station and roadside telephone subsystem. 34.★ System functions are divided into call function, selective call function, conference function, recording function and maintenance management function. 35.★ The broadcasting system consists of central broadcasting, station broadcasting and depot broadcasting system. 36.★ The broadcasting system of the depot is an independent regional broadcasting system. 37. The role of the clock system (1) provides standard time information for rail transit passengers through the global positioning system; ⑵ Provide unified time information for rail transit communication system, automatic fare collection system, integrated monitoring system, power monitoring system and fire alarm system. 38.★ The clock system receives the time signal from the satellite through the gps antenna and transmits it to the station-level clock equipment through the central clock equipment. Station-level clock equipment provides time signals for the sub-clock of each station. 39.★ Video monitoring system (hereinafter referred to as cctv system), whose main function is to make the dispatching management personnel of the control center, station attendant and platform staff monitor in real time or afterwards. 40.★ pids is divided into three layers: the first layer is the editor-in-chief broadcasting center; The second floor is the branch control center (OCC branch); The third floor is the subsystem of station equipment, depot equipment and vehicle-mounted equipment. 4 1.★ The power supply system is divided into centralized power supply mode, decentralized power supply mode and mixed power supply mode. 42.★ Urban rail transit power supply system is mainly composed of main substation (centralized power supply mode), traction power supply system, dynamic lighting system and power monitoring system according to functions; According to the classification of equipment, it is mainly composed of substation equipment, catenary (rail) equipment and power monitoring equipment. 43.★ Urban rail transit power supply system generally has three kinds of substations, namely main substation (decentralized power supply station), traction step-down hybrid substation and step-down substation. Function: as shown in figure 1- 1. Figure 1- 144. Scada system is a system that realizes centralized management, scheduling, real-time control and data acquisition of power supply system in monitoring center (occ). 45. The power control object is all equipment above the low-voltage 0.4kv main switch of each substation of the subway. 46.★ Catenary can be divided into overhead catenary and contact rail according to structure, while overhead catenary can be divided into flexible catenary and rigid catenary according to different suspension methods. 47.★ Electromechanical equipment of urban rail transit consists of automatic fire fighting system, electromechanical equipment monitoring system, environmental control system, water supply and drainage system, low-voltage power distribution and lighting system, elevator and escalator system, screen door system and flood control door system. 48.★ Disaster prevention alarm system is referred to as fas (fire alarm system). 49.★ It is mainly used to protect the important operating equipment in urban rail transit (the ground and elevated stations are not equipped with gas fire extinguishing systems). 50.★ The environmental control system of urban rail transit is generally divided into four subsystems: large environmental control system, small environmental control system, environmental water control system and tunnel ventilation system. The combination of ventilation and air conditioning devices that provide refrigeration, heating, ventilation and (smoke exhaust) to the public areas of the station hall and platform is called environmental control large-scale system. The combination of ventilation and air conditioning devices that provide refrigeration, heating, ventilation (and smoke exhaust) for station management and equipment rooms is called environmental control small system. 5 1.★ The water supply and drainage system is mainly composed of water supply system and drainage system. Water supply system includes domestic water supply system, production water supply system and water fire water supply system; Drainage system includes sewage system, waste water system and rainwater system. 52.★ Evacuation indication lighting belongs to Class I load; Advertising lighting is a three-level load. 53.★ Building automation system (bas) can also be called electromechanical equipment monitoring (emcs) system.