CN101916510B - Method for analyzing main line trafficability of urban mass transit in quasi-moving block mode - Google Patents
Method for analyzing main line trafficability of urban mass transit in quasi-moving block mode Download PDFInfo
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Abstract
The invention discloses a method for analyzing the main line trafficability of an urban mass transit in a quasi-moving block mode, which comprises the following steps of: (A) respectively creating a time-distance curve with a preset departure interval between the tail of a previous car and the head of a next car under barrier free operation conditions in a coordinate system with distance as a horizontal coordinate and time as a vertical coordinate; and (B) calculating a main line tracking interval between the previous car and the corresponding next car in each block section according to the time-distance curve on the tail of the previous car and the head of the next car. In addition, whether the preset departure interval is reasonable or not can be further judged according to the main line tracking interval between the previous car and the corresponding next car in each block section. The analysis method not only increases the scientificity and the accuracy on analyzing the main line trafficability of the urban mass transit in the quasi-moving block mode, but also reduces the difficulty, the complexity and the development cost on analyzing the main line trafficability of the urban mass transit in the quasi-moving block mode.
Description
Technical field
The present invention relates to track traffic control technology field, relate in particular to a kind of analytical approach of urban track traffic quasi-moving block main track handling capacity.
Background technology
The quasi-moving block standard is meant that the train that moves ahead (hereinafter to be referred as front truck) is the unit description orbit occupancy with the block section, then the inlet of tailstock portion place block section is an impact point to follow-up train (hereinafter to be referred as the back car) in the past, according to the safe separation distance in the real-time calculated column of the braking ability of self workshop, to guarantee a kind of block system of train operating safety.
The criterion of main track handling capacity is the main track tracking interval, and the main track tracking interval is meant the minimum interval of the train accessible safe operation of time-distance graph in accordance with regulations, is one of most important index of urban track traffic.
City rail traffic route generally adopts two-wire, and train is carried out in the interval and followed the trail of operation, and stops for passenger's boarding at each station.And, reduce floor area in order to reduce the station cost, and city rail traffic route generally is not provided with station track, and train is to handle passenger traffic service on the main track AT STATION.This characteristics according to driving and passenger traffic service and station equipment, when calculating the handling capacity of fixed equipment, that there is no need to go respectively again the computation interval handling capacity and carrying capacity of station gives analysis-by-synthesis, the handling capacity of computational scheme and should regard interval and station as an integral body.
The factor that the analysis of main track handling capacity need be considered is numerous, and it relates to each side factors such as line conditions, line design, train model, the obturation modes that adopts, train car controlling model, signal system workflow and operation, interlock requirement.
Because the research of urban rail transit in China aspect capability analysis is deep not enough, reality is the raising that the design of circuit has in earlier stage often limited ability, ability has been caused the loss that is difficult to remedy.The method of the common main track handling capacity analysis of adopting at present mainly contains two kinds: equation and emulation verification method.
Equation carries out the analytical calculation of main track handling capacity and mainly has following problem:
1) hand computation workload is big, can only rule of thumb calculate certain point that may become bottleneck, will waste a large amount of workload of analyst if each point that may become bottleneck all calculated;
2) do not consider the influence of train protection system's car controlling model and signal system workflow match line handling capacity, cause the not enough science of result of calculation and accurately.
Therefore equation carries out the analytical calculation of main track handling capacity and often causes not accurate enough, the actual operation of analysis result to be difficult to reach this ability.Above-mentioned deficiency at equation has proposed emulation verification method again, still has following shortcoming but adopt emulation verification method to carry out the analysis of main track handling capacity:
1) emulation not only will be carried out modeling to train model, also need the workflow of each involved subsystem of signal systems such as interlocking, train automatic monitoring system, ground control equipment, the other equipment of rail and mobile unit to be carried out accurate modeling, realize that difficulty is big, implementation method is complicated, need the cost of development of input also very high according to the workflow of actual signal system;
2) can see that by emulation output result the main track tracking interval that whether satisfies emulation and set (shows satisfied when the train operation curve of output is the curve that is not subjected under the train disturbed condition of front and back, when operation curve is interfered, then do not illustrate and satisfy), and to expect minimum main track tracking interval completely, can only be by repeatedly the emulation searching is never satisfied with just the value that satisfies the main track tracking interval, this method is very uneconomic, more can't export the argin of each bottleneck.
Though, with regard to emulation itself, accurate modeling to the actual operation of checking circuit at interval and study train operation to adjust strategy at interval be significant, yet very unsuitable for the main track handling capacity of analytical calculation circuit.
Summary of the invention
(1) technical matters that will solve
At the not enough science of circuit main track handling capacity analytical approach of present urban track traffic and accurately, and required workload is big and the high present situation of cost of development, the technical problem to be solved in the present invention is: how a kind of analytical approach of carrying out the urban track traffic quasi-moving block standard main track handling capacity of the omnidistance main track handling capacity analysis of train is provided, improve science and accuracy that urban track traffic quasi-moving block standard main track handling capacity is analyzed, reduce the difficulty that urban track traffic quasi-moving block standard main track handling capacity is analyzed, complexity and cost of development.
(2) technical scheme
For solving the problems of the technologies described above, a kind of analytical approach of urban track traffic quasi-moving block main track handling capacity is provided, this method comprises:
A, be horizontal ordinate with the distance, the time is to generate the front truck tailstock and the time-distance graph of rear car front under the smoothly operation condition with default departure interval respectively in the coordinate system of ordinate;
B, calculate front truck in the pairing main track tracking interval with the rear car of each block section according to the time-distance graph of the rear car front and the front truck tailstock.
Preferably, after step B, this method further comprises:
C, whether reasonable in the pairing default departure interval of main track tracking interval judgement with the rear car of each block section according to front truck.
Preferably, step B specifically comprises:
Back car is a dangerous point with the inlet of front truck tailstock place block section, braking ability according to self calculates the minimum safe distance that rear car front can reach in real time, and calculates the main track tracking interval of the front car and rear car of this block section correspondence according to described minimum safe distance.
Preferably, the minimum safe distance that described calculating rear car front can reach, and the main track tracking interval that calculates the front car and rear car of this block section correspondence in view of the above specifically comprises:
B1, the front truck tailstock gone out point on the front truck tailstock time-distance graph of place, block section exit horizontal ordinate correspondence clearly along moving a signal system reaction time on the longitudinal axis, and be starting point with this point, make parallel lines along X train operation reverse direction, be dangerous point with this block section porch again, the position at rear car front place when the safe spacing terminal point of calculating rear car front arrives this dangerous point first, be the parallel lines terminal point, this parallel lines terminal point is the minimum safe distance that front truck can reach at the pairing rear car front of this block section;
B2, use and have the pairing time value of point on the rear car front time-distance graph of same horizontal ordinate with the parallel lines terminal point and deduct the pairing time value of parallel lines terminal point and obtain the allowance of front truck in the pairing main track tracking interval with the rear car of this block section;
B3, default departure interval of usefulness deduct front truck and can obtain front truck in the pairing main track tracking interval with the rear car of this block section in the allowance of the pairing main track tracking interval with the rear car of this block section.
Preferably, behind the step B3, this analytical approach further comprises:
To all block section repeated execution of steps B1 to B3, obtain front truck in the pairing main track tracking interval with the rear car of each block section, simultaneously each parallel lines terminal point is linked to each other with the parallel lines of below successively along the direction that is parallel to the longitudinal axis, form the main track tracking interval and analyze stepped line; Do not have intersection point if the time-distance graph of rear car front and described main track tracking interval are analyzed stepped line, determine that then the default departure interval is reasonable, can realize the requirement of train by the accessible safe operation of described stipulated time-distance Curve; If the time-distance graph of rear car front and described main track tracking interval are analyzed stepped line intersection point is arranged, determine that then the default departure interval is unreasonable, can not realize the requirement of train, need to adjust default departure interval or Train Schedule-distance Curve and reanalyse again by the accessible safe operation of described stipulated time-distance Curve.
Preferably, described block section outlet is axle-counting points or insulation of track circuit joint.
Preferably, described step C further comprises:
Maximal value and the default departure interval of front truck in the pairing main track tracking interval with the rear car of each block section compared, if described front truck in the maximal value of the pairing main track tracking interval with the rear car of each block section greater than the default departure interval, determine that then the default departure interval is unreasonable, can not realize the requirement of train, need to adjust default departure interval or Train Schedule-distance Curve and reanalyse again by the accessible safe operation of described stipulated time-distance Curve; If described front truck in the maximal value of the pairing main track tracking interval with the rear car of each block section less than the default departure interval, determine that then the default departure interval is reasonable, can realize the requirement of train by the accessible safe operation of described stipulated time-distance Curve.
(3) beneficial effect
The invention provides a kind of analytical approach of carrying out the urban track traffic quasi-moving block main track handling capacity of the omnidistance main track handling capacity analysis of train, is dangerous point by the back car with the inlet of front truck tailstock place block section, main track tracking interval before and after calculating in real time according to self braking ability between the car, improve science and accuracy that urban track traffic quasi-moving block main track handling capacity is analyzed, and reduced difficulty, complexity and cost of development that urban track traffic quasi-moving block main track handling capacity is analyzed.
Description of drawings
Fig. 1 is the process flow diagram of urban track traffic quasi-moving block main track handling capacity analytical approach of the present invention;
Fig. 2 is the synoptic diagram of urban track traffic quasi-moving block main track handling capacity analytical approach application example of the present invention;
Fig. 3 is that the time-distance graph according to the rear car front and the front truck tailstock calculates the method flow diagram of front truck in the pairing main track tracking interval with the rear car of each block section in the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Main thought of the present invention is: be horizontal ordinate with the distance, the time is to generate the front truck tailstock and the time-distance graph of rear car front under the smoothly operation condition with default departure interval in the coordinate system of ordinate respectively; Time-distance graph according to the rear car front and the front truck tailstock calculates front truck in the pairing main track tracking interval with the rear car of each block section.
Fig. 1 is the process flow diagram of urban track traffic quasi-moving block main track handling capacity analytical approach of the present invention.As shown in Figure 1, the method for the invention mainly may further comprise the steps:
Steps A, be horizontal ordinate with the distance, the time is to generate the front truck tailstock and the time-distance graph of rear car front under the smoothly operation condition with default departure interval respectively in the coordinate system of ordinate.
The smoothly operation condition refers to the normal operation of bicycle of the not considering front vehicle position influence condition of not being obstructed; The factor that needs to consider in the process of the time-distance graph of output train smoothly operation comprises: track data (comprising the other device data of rail), train model and signal system restrictive condition etc.;
Wherein track data comprises data messages such as circuit, track switch, station, the zone of turning back, the gradient, curvature, tunnel open area, speed-limiting messages (speed limit that comprises circuit, track switch, station, the gradient and curvature), track subregion and subregion speed limit, the other equipment of rail; Train model comprises that vehicle commander, marshalling, rotating mass factor, impingement rate, the effective positioning error of train, pulling figure, service braking characteristic, brake hard characteristic, service braking reaction time, brake hard reaction time, vehicle-mounted reaction time, braking set up effective time, the coefficient of sliding friction, train departure setup time or the like; The signal system restrictive condition comprises that braking ratio, passenger that train enters the station get on or off the bus time, headstock tailstock reciprocal time, door contact interrupter time, shield door reaction time, signal system reaction time, interlock device reaction time or the like.
Fig. 2 is the synoptic diagram of urban track traffic quasi-moving block main track handling capacity analytical approach application example of the present invention; In this step, track data (for example gradient and curvature) according to want analysis circuit, the horizontal ordinate of setting up as shown in Figure 2 is a distance, ordinate is the coordinate system of time, and with reference to European railway transport administration system/European Train Control System (ERTMS/ETCS) train model relevant criterion, set up accurate train model, according to ATP (Automatic Train Protection, train protection system) car controlling model and ATO (Automatic Train Operation, the train automated driving system) drives strategy and generate the front truck tailstock and the time-distance graph of rear car front under the smoothly operation condition respectively with default departure interval, the shop is drawn in the described coordinate system, obtains as shown in Figure 2 rear car front time-distance graph and front truck tailstock time-distance graph; The wherein said default departure interval is represented front truck and back car from interval time in same place, that is, the main track tracking interval that expectation reaches, it can be the numerical value of setting arbitrarily, for example 3 minutes.
Step B, calculate front truck in the pairing main track tracking interval with the rear car of each block section according to the time-distance graph of the rear car front and the front truck tailstock.
In this step, car is a dangerous point with the inlet of front truck tailstock place block section after mainly being, braking ability according to self calculates the minimum safe distance that rear car front can reach in real time, and calculates the main track tracking interval of the front car and rear car of this block section correspondence according to described minimum safe distance.
Fig. 3 is that the time-distance graph according to the rear car front and the front truck tailstock calculates the method flow diagram of front truck in the pairing main track tracking interval with the rear car of each block section in the embodiment of the invention.
Referring to Fig. 3, this method specifically comprises:
Step B1, the front truck tailstock is gone out point on the front truck tailstock time-distance graph of clearly a block section exit (axle-counting points or insulation of track circuit joint) place horizontal ordinate correspondence along moving a signal system reaction time on the longitudinal axis, and be starting point with this point, make parallel lines along X train operation reverse direction, be dangerous point with this block section porch again, the position at rear car front place when the safe spacing terminal point of calculating rear car front arrives this dangerous point first, be the parallel lines terminal point, this parallel lines terminal point is that front truck is at this block section, promptly enter the block section porch and go out this block section exit clearly, the minimum safe distance that pairing rear car front can reach until the tailstock from the front truck tailstock.
Safe spacing is meant and is guaranteeing under the prerequisite that train does not slow down, the minimum safe distance that back car and front truck can reach, and this is worth relevant at the gradient, curvature and the ATP car controlling model of circuit with current speed, the train of train; Safe spacing be calculated as prior art.
Wherein, the signal system reaction time is meant that the front truck tailstock goes out clearly block section exit (axle-counting points or insulation of track circuit joint) and receives that to back car the front truck tailstock goes out clearly the information in block section exit and the time of reacting.
Step B2, with parallel lines terminal point T
TheoryWith the some T on the rear car front time-distance graph at same horizontal ordinate place
FactCarry out temporal comparison, can obtain the allowance Δ H=T of front truck in the pairing main track tracking interval with the rear car of this block section
Fact-T
Theory
Because the allowance of this main track tracking interval is corresponding to this block section, so be labeled in the porch of this block section, described allowance on the occasion of the time from the parallel lines of described porch upwards mark, parallel lines from described porch when described allowance is negative value mark downwards.
Step B3, default departure interval of usefulness deduct front truck and can obtain front truck in the pairing main track tracking interval with the rear car of this block section in the allowance of the pairing main track tracking interval with the rear car of this block section.
All block sections are repeated above-mentioned steps B1 to B3, obtain front truck in the pairing main track tracking interval with the rear car of each block section, simultaneously each parallel lines terminal point is linked to each other with the parallel lines of below successively along the direction that is parallel to the longitudinal axis, form the main track tracking interval and analyze stepped line; The effect that the main track tracking interval is analyzed stepped line is: if the time-distance graph of rear car front all (does not promptly have intersection point) above stepped line, determine that then this default departure interval is reasonable, can realize the requirement of train by the accessible safe operation of described stipulated time-distance Curve; If the time-distance graph of rear car front (promptly has intersection point) below stepped line, determine that then this default departure interval is unreasonable, can not realize the requirement of train, need to adjust conditions such as default departure interval or Train Schedule-distance Curve and reanalyse again by the accessible safe operation of described stipulated time-distance Curve.
Whether reasonable in order to analyze the default departure interval, the present invention can also comprise:
Step C, whether reasonable in the pairing default departure interval of main track tracking interval judgement with the rear car of each block section according to front truck.
In this step, maximal value and the default departure interval of front truck in the pairing main track tracking interval with the rear car of each block section compared, if described front truck in the maximal value of the pairing main track tracking interval with the rear car of each block section greater than the default departure interval, determine that then this default departure interval is unreasonable, can not realize the requirement of train, need to adjust conditions such as default departure interval or Train Schedule-distance Curve and reanalyse again by the accessible safe operation of described stipulated time-distance Curve; If described front truck in the maximal value of the pairing main track tracking interval with the rear car of each block section less than the default departure interval, determine that then this default departure interval is reasonable, can realize the requirement of train by the accessible safe operation of described stipulated time-distance Curve.
Further specify method of the present invention below by a specific embodiment.As shown in Figure 2, only comprise that with certain bar the circuit at station 1 and station 2 is an example, this circuit adopts and moves accurate obturation modes, adopt the dot-mode transponder mode with axle-counting points as block section separation, train-ground communication, preset departure interval H=180 second, horizontal ordinate is a distance, and ordinate is the time, and the horizontal ordinate below is the wiring diagram and the corresponding interchange of position of shop picture.Comprise the time-distance graph of the front truck tailstock, the time-distance graph of rear car front and the main track tracking interval analysis stepped line that calculates in the coordinate system.
For example be about near 4900 meters axle-counting points the position go out first block section clearly for the front truck tailstock exit point at horizontal ordinate, with the C point on the front truck tailstock time-distance graph of this place horizontal ordinate correspondence along moving a signal system reaction time on the time longitudinal axis, with this C ' be the parallel lines starting point, make parallel lines along X train operation reverse direction; Calculating rear car front is the required safe spacing of dangerous point with this block section porch (axle-counting points at about 2600 meters of coordinate), determines that the rear car front position is a parallel lines terminal point B point (as shown in the figure); With B ' the comparison of carrying out the longitudinal axis time on the rear car front time-distance graph at B point and same horizontal ordinate place, can obtain front truck is 30 seconds in the allowance of the pairing main track tracking interval with the rear car of this block section, since the allowance of this main track tracking interval be on the occasion of, therefore the parallel lines from the porch of this block section upwards mark.
The time-distance graph of rear car front all (does not have intersection point) above stepped line as can see from Figure 2, illustrates that then this default departure interval is reasonable, can realize the requirement of train by the accessible safe operation of described stipulated time-distance Curve.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (5)
1. the analytical approach of a urban track traffic quasi-moving block main track handling capacity is characterized in that this method comprises:
A, be horizontal ordinate with the distance, the time is to generate the front truck tailstock and the time-distance graph of rear car front under the smoothly operation condition with default departure interval respectively in the coordinate system of ordinate;
B, calculate front truck in the pairing main track tracking interval with the rear car of each block section according to the time-distance graph of the rear car front and the front truck tailstock;
C, whether reasonable in the pairing default departure interval of main track tracking interval judgement with the rear car of each block section according to front truck; Described step C further comprises:
Maximal value and the default departure interval of front truck in the pairing main track tracking interval with the rear car of each block section compared, if described front truck in the maximal value of the pairing main track tracking interval with the rear car of each block section greater than the default departure interval, determine that then the default departure interval is unreasonable, can not realize the requirement of train, need to adjust default departure interval or Train Schedule-distance Curve and reanalyse again by the accessible safe operation of described stipulated time-distance Curve; If described front truck in the maximal value of the pairing main track tracking interval with the rear car of each block section less than the default departure interval, determine that then the default departure interval is reasonable, can realize the requirement of train by the accessible safe operation of described stipulated time-distance Curve.
2. analytical approach as claimed in claim 1, it is characterized in that, step B specifically comprises: the back car is a dangerous point with the inlet of front truck tailstock place block section, braking ability according to self calculates the minimum safe distance that rear car front can reach in real time, and calculates the main track tracking interval of the front car and rear car of this block section correspondence according to described minimum safe distance.
3. analytical approach as claimed in claim 2 is characterized in that, the minimum safe distance that described calculating rear car front can reach, and the main track tracking interval that calculates the front car and rear car of this block section correspondence in view of the above specifically comprises:
B1, the front truck tailstock gone out point on the front truck tailstock time-distance graph of place, block section exit horizontal ordinate correspondence clearly along moving a signal system reaction time on the longitudinal axis, and be starting point with this point, make parallel lines along X train operation reverse direction, be dangerous point with this block section porch again, the position at rear car front place when the safe spacing terminal point of calculating rear car front arrives this dangerous point first, be the parallel lines terminal point, this parallel lines terminal point is the minimum safe distance that front truck can reach at the pairing rear car front of this block section;
B2, use and have the pairing time value of point on the rear car front time-distance graph of same horizontal ordinate with the parallel lines terminal point and deduct the pairing time value of parallel lines terminal point and obtain the allowance of front truck in the pairing main track tracking interval with the rear car of this block section;
B3, default departure interval of usefulness deduct front truck and can obtain front truck in the pairing main track tracking interval with the rear car of this block section in the allowance of the pairing main track tracking interval with the rear car of this block section.
4. analytical approach as claimed in claim 3 is characterized in that, behind the step B3, this analytical approach further comprises:
To all block section repeated execution of steps B1 to B3, obtain front truck in the pairing main track tracking interval with the rear car of each block section, simultaneously each parallel lines terminal point is linked to each other with the parallel lines of below successively along the direction that is parallel to the longitudinal axis, form the main track tracking interval and analyze stepped line; Do not have intersection point if the time-distance graph of rear car front and described main track tracking interval are analyzed stepped line, determine that then the default departure interval is reasonable, can realize the requirement of train by the accessible safe operation of described stipulated time-distance Curve; If the time-distance graph of rear car front and described main track tracking interval are analyzed stepped line intersection point is arranged, determine that then the default departure interval is unreasonable, can not realize the requirement of train, need to adjust default departure interval or Train Schedule-distance Curve and reanalyse again by the accessible safe operation of described stipulated time-distance Curve.
5. analytical approach as claimed in claim 3 is characterized in that, described block section outlet is axle-counting points or insulation of track circuit joint.
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| JP5539590B2 (en) * | 2011-06-23 | 2014-07-02 | 三菱電機株式会社 | Train operation control system |
| CN105912815B (en) * | 2016-05-04 | 2019-04-19 | 中国铁道科学研究院集团有限公司通信信号研究所 | A kind of urban track traffic operation emulation mode and system based on model-driven |
| CN108725518B (en) * | 2018-04-18 | 2020-08-18 | 中国神华能源股份有限公司 | Heavy haul train tracking interval calculation method and device and heavy haul railway system |
| CN109910957B (en) * | 2019-03-27 | 2021-06-15 | 北京全路通信信号研究设计院集团有限公司 | Method and system for generating driving license based on hybrid block |
| CN110281986B (en) * | 2019-06-10 | 2021-04-13 | 北京交通大学 | Train track section locking time calculation method based on quasi-moving block |
| CN114212124B (en) * | 2021-11-25 | 2024-06-14 | 通号城市轨道交通技术有限公司 | Train positive line tracking method and device, electronic equipment and storage medium |
| CN115447637A (en) * | 2022-10-13 | 2022-12-09 | 交控科技股份有限公司 | Rear vehicle tracking method and device based on expected parking position of front vehicle |
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