CN112611583B - Rail vehicle line operation test method, device and system - Google Patents
Rail vehicle line operation test method, device and system Download PDFInfo
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- CN112611583B CN112611583B CN202110002374.7A CN202110002374A CN112611583B CN 112611583 B CN112611583 B CN 112611583B CN 202110002374 A CN202110002374 A CN 202110002374A CN 112611583 B CN112611583 B CN 112611583B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
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Abstract
The invention discloses a rail vehicle line running test method, a device and a system, wherein a line kilometer scale-speed curve, a line kilometer scale-resistance curve and a traction/braking force-speed characteristic curve are input in advance; acquiring the rotating speed torque of the vehicle in real time, and acquiring a real-time kilometer mark and a real-time traction/braking force according to the rotating speed torque acquired in real time; and finally, controlling the running of the railway vehicle according to the real-time running speed and the control speed, the real-time traction/braking force and the control traction/braking force, realizing closed-loop control of the vehicle speed and the traction/braking force, enabling the railway vehicle to always run along with a line kilometer mark-speed curve, a line kilometer mark-resistance curve and a traction/braking force-speed characteristic curve, and realizing accurate simulation of a running line of the railway vehicle.
Description
Technical Field
The invention belongs to the technical field of rail transit vehicles, and particularly relates to a rail vehicle line operation test method, device and system.
Background
In the track traffic crossing type development process, market demands are increasingly diversified, a track vehicle needs to run under various line conditions, and the reduction of the fault rate of the track vehicle during line running is very important. In order to reduce the fault rate of the rail vehicle during the line running process, the rail vehicle needs to perform a line simulation running test before being transported to an owner site, and problems in the running process are found as much as possible. The requirement is that a test device and a test method can truly simulate the running line, so that the running state of the rail vehicle on the test bed can be closest to the running state of the real line, good support is provided for the line simulation test of domestic rail transit enterprise products, and the defects of the current test conditions are overcome.
The conventional test bed cannot simulate the operation working conditions under various line conditions, and cannot perform a rail vehicle line operation test, which is generally performed in an actual line. When a railway vehicle line running test is carried out in an actual line, a rotating speed and torque sensor cannot be installed, and the traction/braking force is calculated, so that the testing accuracy of the traction/braking force is low; meanwhile, if a fault is found during the test, the test needs to be returned to the factory for maintenance, the operation and the transportation are complex, and the cost is high.
Disclosure of Invention
The invention aims to provide a rail vehicle line operation test method, a rail vehicle line operation test device and a rail vehicle line operation test system, which are used for truly simulating the rail vehicle line operation, so that the operation working condition of a rail vehicle on a test bed is closer to the actual line operation working condition, the rail vehicle line operation condition can be truly reflected, the failure rate of the later actual line operation can be reduced, and the cost of the actual line operation test can be reduced by simulating the line operation on the test bed.
The invention solves the technical problems through the following technical scheme: a rail vehicle line operation test method comprises the following steps:
acquiring the rotating speed and the torque of a vehicle;
obtaining the real-time running speed of the vehicle according to the rotating speed and the torque, and obtaining a real-time kilometer post according to the real-time running speed; obtaining real-time traction/braking force of the vehicle according to the rotating speed and the torque;
obtaining the control speed of the vehicle according to the real-time kilometer post and a preset input line kilometer post-speed curve; obtaining the control traction/braking force of the vehicle according to the rotating speed and the torque and a pre-input line kilometer scale-resistance curve and a traction/braking force-speed characteristic curve;
controlling the vehicle to be in a traction state or a braking state according to the real-time running speed and the control speed, so that the real-time running speed follows the control speed; and controlling the vehicle to be in a traction state or a braking state according to the real-time traction/braking force and the control traction/braking force, so that the real-time traction/braking force follows the control traction/braking force.
In the invention, a line kilometer post-speed curve, a line kilometer post-resistance curve and a traction/braking force-speed characteristic curve are input in advance according to customer requirements; after the test is started, the rotating speed torque of the vehicle is acquired in real time, and real-time kilometer posts and real-time traction/braking force can be obtained according to the rotating speed torque acquired in real time; respectively obtaining control speed and control traction/braking force (namely theoretical values of the speed and the traction/braking force) according to a real-time kilometer post, the real-time traction/braking force and a pre-input curve, and finally controlling the running of the railway vehicle according to the real-time running speed and the control speed, the real-time traction/braking force and the control traction/braking force; the test method realizes the closed-loop control of the vehicle speed and the traction/braking force, enables the rail vehicle to always run along a line kilometer post-speed curve, a line kilometer post-resistance curve and a traction/braking force-speed characteristic curve, realizes the accurate simulation of the running line of the rail vehicle, enables the running of the vehicle on a test bed to be close to the running working condition of the actual line, truly reflects the running condition of the rail vehicle on the running line, provides reference for the running of the vehicle on the actual line in the later period, and reduces the fault rate of the running of the actual line in the later period.
Further, the specific implementation process of controlling the vehicle to be in the traction state or the braking state according to the real-time running speed and the control speed is as follows:
when the real-time running speed is lower than the control speed, the accompanying motor is in a traction state, and the vehicle speed is increased;
when the real-time running speed is higher than the control speed, the accompanying motor is in a braking state, and the vehicle speed is reduced.
Further, the test method also comprises a step of detecting the fault of the tested traction motor, and the specific implementation process of the step is as follows:
acquiring the voltage and current of a tested traction motor;
and judging whether the tested traction motor is in a fault state or not according to the voltage and the current.
The present invention also provides a control apparatus comprising:
the data acquisition module is used for acquiring the rotating speed and the torque of the vehicle;
the first data processing module is used for obtaining the real-time running speed of the vehicle according to the rotating speed and the torque and then obtaining a real-time kilometer post according to the real-time running speed; obtaining the control speed of the vehicle according to the real-time kilometer post and a preset input line kilometer post-speed curve;
the second data processing module is used for obtaining real-time traction/braking force of the vehicle according to the rotating speed and the torque; obtaining the control traction/braking force of the vehicle according to the rotating speed and the torque and a pre-input line kilometer scale-resistance curve and a traction/braking force-speed characteristic curve;
the first motor control module is connected with the tested converter and used for controlling the rotating speed of the tested traction motor through the tested converter according to the real-time running speed and the control speed so that the real-time running speed follows the control speed;
the second motor control module is connected with the accompanying converter and used for controlling the torque of the accompanying traction motor through the accompanying converter according to the real-time traction/braking force and the control traction/braking force so as to enable the real-time traction/braking force to follow the control traction/braking force; wherein, the trail-accompanying traction motor is connected with the tested traction motor.
Further, the data acquisition module is also used for acquiring the voltage and the current of the tested traction motor;
the control device also comprises a third data processing module, and the third data processing module is used for judging whether the tested traction motor is in a fault state according to the voltage and the current.
The invention also provides a railway vehicle line operation test system, which comprises the test-accompanying converter, the tested converter, the test-accompanying traction motor, the tested traction motor, the rotating speed and torque sensor and the control device; the test accompanying converter, the test accompanying traction motor and the rotating speed torque sensor are all arranged on the test bed; the tested converter and the tested traction motor are arranged on the railway vehicle;
the test accompanying converter is connected with a test accompanying traction motor; the tested converter is connected with a tested traction motor; the rotating speed torque sensor, the accompanying converter and the tested converter are respectively connected with the control device; and the accompanying traction motor is connected with the tested traction motor through a gear box.
Further, the system also comprises a voltage sensor and a current sensor which are connected with the control device; and the voltage sensor and the current sensor are respectively used for detecting the voltage and the current of the tested traction motor.
Further, the system also comprises a display device connected with the control device, and the display device is used for displaying the real-time running speed, the real-time kilometer post and the real-time traction/braking force of the vehicle.
Advantageous effects
Compared with the prior art, the rail vehicle line operation test method, the device and the system provided by the invention realize closed-loop control of vehicle speed and traction/brake force, so that the rail vehicle always operates along a line kilometer post-speed curve, a line kilometer post-resistance curve and a traction/brake force-speed characteristic curve, the accurate simulation of the rail vehicle operation line is realized, the operation of the vehicle on a test bed is close to the actual line operation condition, the operation condition of the rail vehicle on the operation line is truly reflected, the reference is provided for the later-stage operation of the vehicle on the actual line, and the failure rate of the later-stage actual line operation is reduced.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a rail vehicle track running test method according to an embodiment of the invention;
fig. 2 is a block diagram of a railway vehicle line operation testing system according to an embodiment of the invention.
Detailed Description
The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
As shown in fig. 1, the method for testing the track running of the rail vehicles provided by the present embodiment includes:
1. a line kilometer scale-speed curve, a line kilometer scale-resistance curve and a traction/braking force-speed characteristic curve are input in advance.
According to the requirements of customers, namely the requirements of the customers on the running working conditions of the railway vehicles of the type on the running line, for example, the speed corresponding to the kilometer scale of the line is a kilometer scale-speed curve of the line, the resistance value corresponding to the kilometer scale of the line is a kilometer scale-resistance curve of the line, and the speed corresponding to different traction force/brake force is a traction force/brake force-speed characteristic curve. The kilometer sign is a mark indicating the entire kilometer of the distance calculated on the operation line.
2. The rotation speed and the torque of the vehicle are acquired.
In order to obtain the real-time running speed and the real-time traction/brake force of the vehicle, the rotating speed and the torque of the vehicle are collected by a rotating speed torque sensor, namely the rotating speed and the torque of a tested traction motor and an auxiliary traction motor are collected. The rotating speed torque sensor is an existing product.
3. Obtaining the real-time running speed of the vehicle according to the rotating speed and the torque, and then obtaining a real-time kilometer post according to the real-time running speed; and obtaining the real-time traction/braking force of the vehicle according to the rotating speed and the torque.
The real-time running speed of the vehicle can be obtained according to the rotating speed and the torque, the real-time running speed is subjected to integral operation to obtain an actual running distance, and a real-time kilometer post is obtained according to the actual running distance.
The torque refers to the torque for rotating the motor, and real-time traction/braking force can be obtained according to the torque.
4. Obtaining the control speed of the vehicle according to the real-time kilometer post and a preset input line kilometer post-speed curve; and obtaining the control traction/braking force of the vehicle according to the rotating speed and the torque and the pre-input line kilometer scale-resistance curve and traction/braking force-speed characteristic curve.
The real-time kilometer post of the vehicle is obtained through the rotating speed torque, the speed corresponding to the real-time kilometer post can be found on a line kilometer post-speed curve, namely the theoretical value of the running speed of the vehicle (namely the control speed of the vehicle) at the kilometer post, different real-time kilometer posts correspond to different control speeds, closed-loop control is formed, the real-time running speed of the vehicle always follows the corresponding control speed, and therefore the vehicle runs according to the line kilometer post-speed curve, and the accurate simulation of the line running of the vehicle is achieved.
And obtaining a real-time kilometer post from the rotating speed torque, and finding a resistance value corresponding to the real-time kilometer post on a line kilometer post-resistance curve, namely processing a theoretical value of the resistance in the kilometer post. And obtaining a real-time running speed from the rotating speed torque, and finding the traction/braking force corresponding to the real-time running speed in a traction/braking force-speed characteristic curve, namely the theoretical value of the traction/braking force (namely the control traction/braking force) at the real-time running speed. The method comprises the steps that different real-time kilometers correspond to different resistance values, different real-time running speeds correspond to different control traction/brake forces, the torque exerted by an accompanying traction motor is controlled according to the resistance values and the control traction/brake forces, and the real-time kilometers and the real-time running speeds change along with the torque change of the accompanying traction motor, so that the rotating speed torque, the real-time running speeds, the real-time kilometers, the control speeds and the control traction/brake forces are mutually associated to form closed-loop control, the rail vehicle runs according to a line kilometer mark-speed curve, a line kilometer mark-resistance curve and a traction/brake force-speed characteristic curve all the time, the accurate simulation of a rail vehicle running line is realized, the running condition of the vehicle on a test bed is close to the running condition of an actual line, the running condition of the rail vehicle on the running line is truly reflected, reference is provided for the running of vehicles on the actual line in a later period, and the fault rate of the actual line in the later period is reduced.
5. Controlling the vehicle to be in a traction state or a braking state according to the real-time running speed and the control speed, so that the real-time running speed follows the control speed; and controlling the vehicle to be in a traction state or a braking state according to the real-time traction/braking force and the control traction/braking force, so that the real-time traction/braking force follows the control traction/braking force.
The control speed is transmitted to the tested traction motor through the tested converter, the rotating speed of the tested traction motor is controlled, the rotating speed of the tested traction motor and the torque of the tested traction motor are fed back to the real-time running speed of the vehicle, the real-time running speed is fed back to the real-time kilometer post, and the real-time kilometer post is fed back to the control speed, so that closed-loop control is formed, the real-time running speed always follows the control speed, and the accurate simulation of the running of the rail vehicle according to a line kilometer post-speed curve is realized.
Meanwhile, the control traction/braking force is transmitted to the test-accompanying traction motor through the test-accompanying converter, the torque of the test-accompanying traction motor is controlled, the torque of the test-accompanying traction motor and the rotating speed of the tested traction motor are fed back to the real-time running speed and the real-time kilometer post, the real-time kilometer post is fed back to the resistance value, and the real-time running speed is fed back to the control traction/braking force, so that closed-loop control is formed, the real-time traction/braking force always follows the control traction/braking force, and the accurate simulation of the rail vehicle according to a line kilometer post-resistance curve and a traction/braking force-speed characteristic curve is realized.
When the real-time running speed is lower than the control speed, the accompanying motor is in a traction state, and the vehicle speed is increased; when the real-time running speed is higher than the control speed, the accompanying motor is in a braking state, and the vehicle speed is reduced.
The present embodiment further provides a control device, including:
the data acquisition module is used for acquiring the rotating speed and the torque of the vehicle;
the first data processing module is used for obtaining the real-time running speed of the vehicle according to the rotating speed and the torque and then obtaining a real-time kilometer post according to the real-time running speed; obtaining the control speed of the vehicle according to the real-time kilometer post and a preset input line kilometer post-speed curve;
the second data processing module is used for obtaining real-time traction/braking force of the vehicle according to the rotating speed and the torque; obtaining the control traction/braking force of the vehicle according to the rotating speed and the torque, and a line kilometer scale-resistance curve and a traction/braking force-speed characteristic curve which are input in advance;
the first motor control module is connected with the tested converter and used for controlling the rotating speed of the tested traction motor through the tested converter according to the real-time running speed and the control speed so that the real-time running speed follows the control speed;
the second motor control module is connected with the accompanying converter and used for controlling the torque of the accompanying traction motor through the accompanying converter according to the real-time traction/braking force and the control traction/braking force so as to enable the real-time traction/braking force to follow the control traction/braking force; the test-accompanying traction motor is connected with the tested traction motor through the gear box, the test-accompanying traction motor operates in a torque mode, and the tested traction motor operates in a speed mode.
As shown in fig. 2, the embodiment further provides a rail vehicle line operation testing system, which includes a test-assisting converter, a tested converter, a test-assisting traction motor, a tested traction motor, a rotational speed and torque sensor, and the control device as described above; the test accompanying converter, the test accompanying traction motor and the rotating speed and torque sensor are all arranged on the test bed; the converter to be tested and the traction motor to be tested are both arranged on the railway vehicle.
The test-accompanying converter is connected with the test-accompanying traction motor; the tested converter is connected with a tested traction motor; the rotating speed torque sensor, the accompanying converter and the tested converter are respectively connected with the control device; the test accompanying traction motor is connected with the tested traction motor through a gear box.
In this embodiment, the system further comprises a voltage sensor and a current sensor connected to the control device; the voltage sensor and the current sensor are respectively used for detecting the voltage and the current of the tested traction motor, and the control device judges whether the tested traction motor is in a fault state according to the detected voltage and current values, so that the fault condition of the vehicle during the line operation is obtained, the fault condition is overhauled, and the fault rate of the subsequent vehicle during the actual line operation is reduced.
In this embodiment, the system further comprises a display device connected to the control device, the display device being configured to display a real-time operating speed, a real-time kilometer post, and a real-time tractive effort/braking effort of the vehicle.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or modifications within the technical scope of the present disclosure may be easily conceived by those skilled in the art and shall be covered by the scope of the present invention.
Claims (6)
1. A rail vehicle line operation test method is characterized by comprising the following steps:
acquiring the rotating speed and the torque of a vehicle;
obtaining the real-time running speed of the vehicle according to the rotating speed and the torque, and obtaining a real-time kilometer post according to the real-time running speed; obtaining real-time traction/braking force of the vehicle according to the rotating speed and the torque;
obtaining the control speed of the vehicle according to the real-time kilometer post and a preset input line kilometer post-speed curve; obtaining the control traction/braking force of the vehicle according to the rotating speed and the torque and a pre-input line kilometer scale-resistance curve and a traction/braking force-speed characteristic curve;
controlling the rotating speed of the tested traction motor according to the real-time running speed and the control speed, so that the real-time running speed follows the control speed; controlling the torque of a test-accompanying traction motor according to the real-time traction/braking force and the control traction/braking force, so that the real-time traction/braking force follows the control traction/braking force;
the method also comprises a step of detecting the fault of the tested traction motor, and the specific implementation process of the step is as follows:
acquiring the voltage and current of a tested traction motor;
and judging whether the tested traction motor is in a fault state or not according to the voltage and the current.
2. The rail vehicle track running test method as claimed in claim 1, wherein: the specific implementation process of controlling the vehicle to be in the traction state or the braking state according to the real-time running speed and the control speed is as follows:
when the real-time running speed is lower than the control speed, the accompanying motor is in a traction state, and the vehicle speed is increased;
when the real-time running speed is higher than the control speed, the accompany test motor is in a braking state, and the vehicle speed is reduced.
3. A rail vehicle line operation test device, characterized by includes:
the data acquisition module is used for acquiring the rotating speed and the torque of the vehicle; the system is used for acquiring the voltage and the current of the tested traction motor;
the first data processing module is used for obtaining the real-time running speed of the vehicle according to the rotating speed and the torque and then obtaining a real-time kilometer post according to the real-time running speed; obtaining the control speed of the vehicle according to the real-time kilometer post and a preset input line kilometer post-speed curve;
the second data processing module is used for obtaining real-time traction/braking force of the vehicle according to the rotating speed and the torque; obtaining the control traction/braking force of the vehicle according to the rotating speed and the torque and a pre-input line kilometer scale-resistance curve and a traction/braking force-speed characteristic curve;
the third data processing module is used for judging whether the tested traction motor is in a fault state or not according to the voltage and the current;
the first motor control module is connected with the tested converter and used for controlling the rotating speed of the tested traction motor through the tested converter according to the real-time running speed and the control speed so that the real-time running speed follows the control speed;
the second motor control module is connected with the accompanying converter and used for controlling the torque of the accompanying traction motor through the accompanying converter according to the real-time traction/braking force and the control traction/braking force so as to enable the real-time traction/braking force to follow the control traction/braking force; wherein, the trail-accompanying traction motor is connected with the tested traction motor.
4. The utility model provides a rail vehicle circuit operation test system which characterized in that: the device comprises a test-assisting converter, a tested converter, a test-assisting traction motor, a tested traction motor, a rotating speed and torque sensor and the railway vehicle line operation test device as claimed in claim 3; the test accompanying converter, the test accompanying traction motor and the rotating speed torque sensor are all arranged on the test bed; the tested converter and the tested traction motor are arranged on the railway vehicle;
the test-accompanying converter is connected with a test-accompanying traction motor; the tested converter is connected with a tested traction motor; the rotating speed torque sensor, the accompanying converter and the tested converter are respectively connected with the railway vehicle line operation test device; and the accompanying traction motor is connected with the tested traction motor through a gear box.
5. The railway vehicle line running test system as claimed in claim 4, wherein: the device also comprises a voltage sensor and a current sensor which are connected with the rail vehicle line operation test device; and the voltage sensor and the current sensor are respectively used for detecting the voltage and the current of the tested traction motor.
6. The railway vehicle line running test system as claimed in claim 4, wherein: the rail vehicle line running test device is characterized by further comprising a display device connected with the rail vehicle line running test device, and the display device is used for displaying the real-time running speed, the real-time kilometer post and the real-time traction/braking force of a vehicle.
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