Complete vehicle road simulation test air spring height constant control method and device

Abstract

The invention relates to the technical field of air spring control, in particular to an air spring height constant control method and device for a whole vehicle road simulation test, and the method comprises the steps: collecting electric signals from a vibration acceleration sensor and a stay wire type displacement sensor in real time through a data collection instrument, and transmitting the electric signals to TCE software for real-time processing, the transmission inflation and deflation controller controls the operation of the electromagnetic distribution valve and the air compressor when the test is stopped intermittently, inflates and deflates the air spring of the test vehicle, adjusts the height of the air spring in real time, and adjusts the height in time, thereby preventing the test equipment from exceeding the limit to cause the stop of the test, and guaranteeing the smooth proceeding of the test. Therefore, the problem that when a 24-channel whole vehicle road simulation test is carried out, application vehicle type equipment of part of air spring shock absorbers is prone to overrun is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air spring control, in particular to a vehicle road simulation test air spring height constant control method and device. BACKGROUND

[0002] Due to the temperature rise of the air spring caused by the test, or the expansion or compression of the air spring caused by the change of the ambient temperature, the height change of the air spring is affected.

[0003] Therefore, when the 24-channel vehicle road simulation test is performed, the pre-set force and acceleration limit may be exceeded, and the test may be automatically stopped, and the height of the air spring needs to be adjusted repeatedly, which greatly affects the test efficiency, and needs to be solved urgently. SUMMARY

[0004] The present application provides a vehicle road simulation test air spring height constant control method and device to solve the problem that when the 24-channel vehicle road simulation test is performed, the application vehicle model equipment of some air spring dampers is prone to over-limit.

[0005] The first aspect of the present application provides a vehicle road simulation test air spring height constant control device, comprising the following steps: collecting displacement change electric signals of a pre-set test vehicle and current running state electric signals of a pre-set MTS vehicle road simulation test machine, and generating digital signals corresponding to each electric signal, and sending the digital signals to a pre-set gas charging and discharging controller; judging the state type of the current running state electric signals, when the state type is a vibration state, closing the pre-set air compressor through the gas charging and discharging controller; when the state type is a static state, adjusting and overloading protection of the air spring at each position through the gas charging and discharging controller to adjust the height of the air spring.

[0006] According to the above technical means, the data acquisition instrument of the present application embodiment can collect electric signals from the vibration acceleration sensor and the pull wire displacement sensor in real time, and transmit them to the TCE software for real-time processing, and deliver the gas charging and discharging controller, control the electromagnetic distribution valve and the air compressor to run when the test is intermittently stopped, charge and discharge the air spring of the test vehicle, adjust the height of the air spring in real time, avoid test equipment over-limit to stop the test, ensure the smooth progress of the test, and expand the field of vehicle road simulation test.

[0007] Optionally, in one embodiment of the present application, before collecting the displacement change electrical signal of the preset test vehicle and the current running state electrical signal of the preset MTS whole vehicle road simulation test machine, it further comprises: installing the test vehicle on the MTS whole vehicle road simulation test machine, and arranging two pull wire displacement sensors at positions where the front subframe and rear subframe of the test vehicle are at the same height from the test iron floor, and connecting the four pull wire displacement sensors to the preset data acquisition instrument debugging device; connecting the air compressor to the preset electromagnetic distribution valve to inflate and deflate the air spring of the test vehicle, and adjusting to the preset height, and connecting the adjusted air spring to the preset TCE software to calibrate the zero height.

[0008] According to the above technical means, the embodiments of the present application reasonably arrange and connect multiple sensors according to actual conditions to ensure consistent data acquisition reference, improve data accuracy, lay a foundation for subsequent data collection and analysis, and adjust the air spring according to the standard and calibrate the zero height, so as to ensure the accuracy of the initial state of the test, which is conducive to the smooth progress of the subsequent simulation test.

[0009] Optionally, in one embodiment of the present application, the collection of the displacement change electrical signal of the preset test vehicle and the current running state electrical signal of the preset MTS whole vehicle road simulation test machine, and the generation of the digital signal corresponding to each electrical signal, and the sending of the digital signal to the preset inflation and deflation controller, comprises: loading the preset road load spectrum, and starting the preset data acquisition instrument debugging device to run the preset TCE software; identifying the height change information of the four relevant positions of the test vehicle from the ground by the preset pull wire displacement sensor, and transmitting the height change information to the data acquisition instrument debugging device to collect the corresponding displacement change electrical signal; identifying the current running state electrical signal of the MTS whole vehicle road simulation test machine by the preset vibration acceleration sensor, and transmitting the current running state electrical signal to the data acquisition instrument debugging device; transmitting the displacement change electrical signal and the current running state electrical signal to the TCE software for data analysis by the data acquisition instrument debugging device to generate the corresponding digital signal, and sending the digital signal to the inflation and deflation controller.

[0010] According to the above technical means, the embodiments of the present application collect displacement and test machine state data by multiple devices in cooperation, and accurately analyze in combination with the TCE software, so as to provide reliable digital signals for the inflation and deflation controller, and ensure the accuracy of the vehicle related test and the timeliness of the controller response.

[0011] Optionally, in an embodiment of the present application, when the state type is the static state, the air spring at each position is inflated and deflated by the inflation and deflation controller for height adjustment of the air spring, comprising: when the inflation and deflation controller receives the digital signal, automatically controlling the preset electromagnetic distribution valve and the air compressor to operate, so as to send an air path control signal to the electromagnetic distribution valve and an operation or stop signal to the air compressor through the inflation and deflation controller, to control the air compressor to inflate the air path opened by the electromagnetic distribution valve, to adjust the height of the air spring; judging whether the height of the air spring exceeds the preset height floating interval, wherein, in the case that the height of the air spring exceeds the height floating interval, automatically disconnecting the signal connection with the inflation and deflation controller through the TCE software.

[0012] According to the above technical means, the embodiments of the present application collect the electric signals from the vibration acceleration sensor and the in-line displacement sensor in real time through the data acquisition instrument, and transmit them to the TCE software for real-time processing, and deliver the inflation and deflation controller, to control the electromagnetic distribution valve and the air compressor to operate when the test is intermittently stopped, to inflate and deflate the air spring of the test vehicle, to adjust the height of the air spring in real time, to avoid test equipment overrun to stop the test, and to ensure the smooth progress of the test.

[0013] Optionally, in an embodiment of the present application, further comprising: connecting a preset electronic air pressure gauge between the air compressor and the electromagnetic distribution valve, to display the current air pressure value; judging whether the current air pressure value is greater than the preset minimum required air pressure for the test or the rated air pressure of the air spring, wherein, in the case that the current air pressure value is greater than the minimum required air pressure for the test or the rated air pressure of the air spring, controlling the electronic air pressure gauge to automatically alarm.

[0014] According to the above technical means, the embodiments of the present application display the air pressure between the air compressor and the electromagnetic distribution valve in real time through the electronic air pressure gauge, to facilitate real-time monitoring of the air pressure, and can automatically alarm when the air pressure exceeds the minimum required air pressure for the test or the critical rated air pressure of the air spring, thereby effectively ensuring the safety of the test and the stability of the equipment The second aspect embodiment of the application provides a constant height control device for air springs in a whole vehicle road simulation test, comprising: a collection module, configured to collect displacement change electrical signals of a preset test vehicle and current running state electrical signals of a preset MTS whole vehicle road simulation test machine, and generate digital signals corresponding to each electrical signal, and send the digital signals to a preset air charge and discharge controller; a judgment module, configured to judge a state type of the current running state electrical signals, and when the state type is a vibration state, turn off a preset air compressor through the air charge and discharge controller; and a height adjustment module, configured to, when the state type is a static state, perform air charge and discharge adjustment and overload protection on air springs at each position through the air charge and discharge controller, so as to adjust the height of the air springs.

[0015] Optionally, in one embodiment of the application, the device further comprises: an installation module, configured to install the test vehicle on the MTS whole vehicle road simulation test machine before collecting the displacement change electrical signals of the test vehicle and the current running state electrical signals of the MTS whole vehicle road simulation test machine, and arrange two pull-wire displacement sensors at positions where the front subframe and the rear subframe of the test vehicle are at the same height from the test iron floor, and connect the four pull-wire displacement sensors to a preset data acquisition instrument debugging device; and a connection module, configured to connect a preset electromagnetic distribution valve to the air compressor, so as to perform air charge and discharge on the air springs of the test vehicle and adjust the height according to a preset height, and connect the adjusted air springs to a preset TCE software, so as to calibrate the height to zero.

[0016] Optionally, in one embodiment of the application, the collection module comprises: a running unit, configured to load a preset road load spectrum, and start a preset data acquisition instrument debugging device to run a preset TCE software; a first identification unit, configured to identify height change information of four relevant positions of the test vehicle from the ground through a preset pull-wire displacement sensor, and transmit the height change information to the data acquisition instrument debugging device to collect corresponding displacement change electrical signals; a second identification unit, configured to identify the current running state electrical signals of the MTS whole vehicle road simulation test machine through a preset vibration acceleration sensor, and transmit the current running state electrical signals to the data acquisition instrument debugging device; and a generation unit, configured to transmit the displacement change electrical signals and the current running state electrical signals to the TCE software for data analysis through the data acquisition instrument debugging device, so as to generate corresponding digital signals, and send the digital signals to the air charge and discharge controller.

[0017] Optionally, in an embodiment of the present application, the height adjustment module comprises: a control unit configured to automatically control the preset electromagnetic distribution valve and the air compressor to operate when the charge-discharge controller receives the digital signal, to send an air path control signal to the electromagnetic distribution valve and an operation or stop signal to the air compressor through the charge-discharge controller, to control the air compressor to charge the air path opened by the electromagnetic distribution valve, and to adjust the height of the air spring; and an overload protection unit configured to determine whether the height of the air spring exceeds a preset height floating interval, wherein, in the case that the height of the air spring exceeds the height floating interval, the signal connection with the charge-discharge controller is automatically disconnected through the TCE software.

[0018] Optionally, in an embodiment of the present application, the height adjustment module further comprises: a display module configured to be connected between the air compressor and the electromagnetic distribution valve through a preset electronic air gauge, to display a current air pressure value; and an alarm module configured to determine whether the current air pressure value is greater than a preset minimum air pressure required for a test or an air spring rated air pressure, wherein, in the case that the current air pressure value is greater than the minimum air pressure required for the test or the air spring rated air pressure, the electronic air gauge is controlled to perform an automatic alarm operation.

[0019] The third aspect embodiment of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle road simulation test air spring height constant control method as described in the above embodiments.

[0020] The fourth aspect embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the vehicle road simulation test air spring height constant control method as described above.

[0021] The fifth aspect embodiment of the present application provides a computer program product, comprising a computer program, which is executed to implement the vehicle road simulation test air spring height constant control method as described above.

[0022] Therefore, the embodiments of the present application have the following beneficial effects: The embodiment of the application can be installed on a preset MTS whole vehicle road simulation test machine, and the test vehicle is connected with the preset pull-wire displacement sensor and vibration acceleration sensor, and the pull-wire displacement sensor and vibration acceleration sensor are calibrated, and after the calibration is completed, the corresponding electric equipment is restarted; the displacement change electric signal of the preset test vehicle and the current running state electric signal of the preset MTS whole vehicle road simulation test machine are collected, and the corresponding digital signal of each electric signal is generated, and the digital signal is sent to the preset gas charging and discharging controller; the current running state electric signal of the MTS whole vehicle road simulation test machine is judged, when the current running state electric signal of the whole vehicle road simulation test machine is the vibration state, the digital signal is received through the preset gas charging and discharging controller, and the preset air compressor is closed, when the state type is the static state, the air springs at each position are adjusted and protected by the gas charging and discharging controller to adjust the height of the air spring. The data acquisition instrument of the application collects the electric signal from the vibration acceleration sensor and the pull-wire displacement sensor in real time, and transmits it to the TCE software for real-time processing, and transmits the gas charging and discharging controller, controls the electromagnetic distribution valve and the air compressor to run when the test is intermittent, charges and discharges the air spring of the test vehicle, adjusts the height of the air spring in real time, avoids the test equipment from being over-limited to stop the test, ensures the smooth progress of the test, and expands the whole vehicle road simulation test field. Therefore, the problems that the application vehicle model equipment of some air spring shock absorbers is prone to over-limiting during 24-channel whole vehicle road simulation test are solved.

[0023] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the description or be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 A flow chart of a whole vehicle road simulation test air spring height constant control method according to an embodiment of the application is provided. Figure 2 A point selection schematic diagram provided by the embodiment of the application is provided. Figure 3 A logic architecture schematic diagram of a whole vehicle road simulation test air spring height constant control method provided by the embodiment of the application is provided. Figure 4 An execution logic schematic diagram of a whole vehicle road simulation test air spring height constant control method provided by the embodiment of the application is provided. Figure 5 An example diagram of a whole vehicle road simulation test air spring height constant control device according to an embodiment of the application is provided. Figure 6 The structural schematic diagram of the electronic device provided by the embodiment of the present application is shown.

[0025] In the formula, 10 is an air spring height constant control device for a vehicle road simulation test; 100 is a collection module, 200 is a judgment module, and 300 is a height adjustment module; 601 is a memory, 602 is a processor, and 603 is a communication interface. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0027] The vehicle road simulation test air spring height constant control method and device of the embodiments of the present application are described below with reference to the drawings. In view of the problems mentioned in the above background art, the present application provides a vehicle road simulation test air spring height constant control method, in which the test vehicle is installed on a preset MTS vehicle road simulation test machine, and the test vehicle is connected with a preset pull-wire displacement sensor and a vibration acceleration sensor, and the pull-wire displacement sensor and the vibration acceleration sensor are calibrated, and after the calibration is completed, the corresponding electrical equipment is restarted; the displacement change electrical signal of the preset test vehicle and the current running state electrical signal of the preset MTS vehicle road simulation test machine are collected, and a digital signal corresponding to each electrical signal is generated, and the digital signal is sent to a preset gas charging and discharging controller; the current running state electrical signal of the MTS vehicle road simulation test machine is judged, when the current running state electrical signal of the vehicle road simulation test machine is in a vibration state, the digital signal is received by the preset gas charging and discharging controller, and the preset air compressor is turned off, when the state type is in a static state, the air springs at each position are adjusted and protected by the gas charging and discharging controller to adjust the height of the air springs. The present application collects the electrical signals from the vibration acceleration sensor and the pull-wire displacement sensor in real time by the data collection instrument, and transmits them to the TCE software for real-time processing, and transmits the gas charging and discharging controller, controls the electromagnetic distribution valve and the air compressor to run when the test is intermittently stopped, charges and discharges the air springs of the test vehicle, adjusts the height of the air springs in real time, avoids the test to be stopped due to the test equipment being out of limit, ensures the test to be carried out smoothly, and expands the field of vehicle road simulation test. Thus, the problems that the application vehicle model equipment of some air spring shock absorbers is easy to be out of limit when the 24-channel vehicle road simulation test is carried out are solved.

[0028] Specifically, Figure 1This is a flowchart illustrating a method for maintaining a constant air spring height during a vehicle road simulation test, as provided in an embodiment of this application.

[0029] like Figure 1 As shown, the method for maintaining a constant air spring height in a vehicle road simulation test includes the following steps: In step S101, the preset electrical signals of displacement change of the test vehicle and the preset electrical signals of current operating status of the MTS whole vehicle road simulation test machine are collected, and digital signals corresponding to each electrical signal are generated and sent to the preset inflation / deflation controller.

[0030] In this embodiment, the test vehicle is first prepared, and counterweights and sensors are arranged. After completion, the test vehicle is installed on the MTS vehicle road simulation test machine (the test vehicle can be a vehicle at various stages, such as the OTS stage or the Mule stage), and a wire-type displacement sensor is connected, and a vibration acceleration sensor is attached and fixed. The above sensors are calibrated. After calibration, all equipment is powered off and the power supply is reconnected.

[0031] Optionally, in one embodiment of this application, before acquiring the preset electrical signal of displacement change of the test vehicle and the preset electrical signal of current operating status of the MTS vehicle road simulation test machine, the method further includes: installing the test vehicle on the MTS vehicle road simulation test machine, and arranging two wire-type displacement sensors at positions where the front subframe and rear subframe of the test vehicle are at the same height from the test floor, and connecting the four wire-type displacement sensors to a preset data acquisition and debugging device; using an air compressor connected to a preset electromagnetic distribution valve to inflate and deflate the air springs of the test vehicle, and adjusting them according to a preset height, and connecting the adjusted air springs to preset TCE software for zeroing height calibration.

[0032] It should be noted that, after all preparation work is completed, in this embodiment of the application, the test vehicle can be installed on the MTS vehicle road simulation test machine. Two wire-type displacement sensors are placed at a position on the front subframe of the test vehicle that is at the same height as the test floor (e.g., on a flat surface). Similarly, two wire-type displacement sensors are placed at two positions on the rear subframe that are at the same height as the test floor. The four wire-type displacement sensors are then connected to the eDAQ data acquisition instrument (i.e., the data acquisition instrument debugging equipment), completing the above pre-calibration preparations.

[0033] Secondly, in this embodiment, an air compressor can be connected to a preset electromagnetic distribution valve to inflate and deflate the air spring of the test vehicle and adjust it according to the height L. After adjustment, the TCE software is connected to perform zero height calibration.

[0034] In actual implementation, the embodiment of the application can disassemble the power battery pack of the vehicle, and perform load balancing (including half load and full load balancing states) when the vehicle is in a powered state. After load balancing is completed, the vehicle automatically adjusts the body height, that is, the height adjustment of the air spring is completed. Secondly, since some vehicle models do not have complete vehicle appearances in the mule stage, there is no consistent measurement point for reference, that is, the appearance of the vehicle body is irregular. Therefore, the embodiment of the application can measure the distance from the wheel center to a certain position of the vehicle body, and select a fixed size point for marking. The distance from the hub to a certain point of the vehicle body can be arbitrarily selected, and the selection principle is that the distance from the wheel center of the four wheels to the selected point is consistent (the distance is set as L), that is, Lleft front=Lleft rear=Lright front=Lright rear, as shown in Figure 2 .

[0035] After the point selection work is completed, the embodiment of the application also needs to perform other vehicle preparation work, which will be placed for a period of time (the power battery pack is disassembled and replaced with a power battery prosthesis counterweight block, at this time the whole vehicle is in a powered-off state), the height of the air spring will change, at this time the original electromagnetic distribution valve and air compressor of the vehicle cannot work normally, therefore it is necessary to disconnect them and reconnect the electromagnetic distribution valve and air compressor, and connect the electrical equipment (eDAQ data acquisition instrument, TCE software, gas charging and discharging controller, electronic air pressure gauge).

[0036] As shown in Figure 3 , (the dashed line is a digital signal connection, the single solid line is an electrical signal connection, and the double solid line is an air path connection), the air spring shock absorber is installed on the test vehicle, and is connected with the electromagnetic distribution valve on the air path. Before the test, the original electromagnetic distribution valve of the vehicle needs to be disconnected and the electromagnetic distribution valve needs to be reconnected. The air compressor is used to charge the air spring on the shock absorber, and is not used with the vehicle-mounted air compressor. The air compressor is connected with the electromagnetic distribution valve, receives digital signals from the gas charging and discharging controller, and is powered by a stabilized power supply. The electromagnetic distribution valve is a transfer station for the air compressor to charge each air spring, and is not used with the original battery distribution valve. The electrical equipment is connected to the charging and discharging controller, and is powered by a stabilized power supply.

[0037] In the embodiment of the application, the test vehicle applies the external electromagnetic distribution valve and air compressor to charge and discharge the air spring of the vehicle. Since the original test vehicle will disassemble the power battery pack and replace it with a counterweight block before performing the whole vehicle road simulation test, the high-voltage interlock and low-voltage interlock lines of the whole vehicle are in an open circuit state. After the chassis domain controller is powered on, it cannot recognize and control the body height and other states of the vehicle. Therefore, a more reasonable solution is to replace the original electrical equipment with external electrical equipment.

[0038] Therefore, the embodiment of the present application can ensure the consistency of data acquisition reference, improve data accuracy, lay a foundation for subsequent data acquisition and analysis, and adjust the air spring according to the standard and clear zero calibration, so as to ensure the accuracy of the initial state of the test, which is conducive to the smooth progress of the subsequent simulation test.

[0039] Optionally, in an embodiment of the present application, it further comprises: connecting the preset electronic manometer between the air compressor and the electromagnetic distribution valve to display the current air pressure value; judging whether the current air pressure value is greater than the preset minimum air pressure required for the test or the rated air pressure of the air spring, wherein, in the case that the current air pressure value is greater than the minimum air pressure required for the test or the rated air pressure of the air spring, the electronic manometer is controlled to automatically alarm.

[0040] In the embodiment of the present application, the electronic manometer is connected between the air compressor and the electromagnetic distribution valve, which can display the air pressure in real time and set the air pressure range, and automatically alarm when the air pressure exceeds the minimum air pressure required for the test or the rated air pressure of the air spring.

[0041] Therefore, the embodiment of the present application can display the air pressure between the air compressor and the electromagnetic distribution valve in real time through the electronic manometer, so as to facilitate real-time monitoring of the air pressure, and automatically alarm when the air pressure exceeds the minimum air pressure required for the test or the rated air pressure of the air spring, thereby effectively ensuring the safety of the test and the stability of the equipment.

[0042] Further, the embodiment of the present application can identify the displacement change electric signal of the test vehicle through the pull wire displacement sensor, identify the current running state electric signal of the MTS whole vehicle road simulation test machine through the vibration acceleration sensor, and process and analyze the displacement change electric signal and the current running state electric signal to obtain the corresponding digital signal, and send the digital signal to the air charging and discharging controller, thereby providing reliable data guidance and basis for subsequent adjustment of the height of the air spring.

[0043] Optionally, in an embodiment of the present application, the displacement change electric signal of the preset test vehicle and the current running state electric signal of the preset MTS whole vehicle road simulation test machine are collected, and a digital signal corresponding to each electric signal is generated, and the digital signal is sent to the preset air charging and discharging controller, comprising: loading a preset road load spectrum, and starting a preset data acquisition instrument debugging device to run a preset TCE software; identifying the height change information of the four relevant positions of the test vehicle from the ground by the preset guyed displacement sensor, and transmitting the height change information to the data acquisition instrument debugging device to collect the corresponding displacement change electric signal; identifying the current running state electric signal of the MTS whole vehicle road simulation test machine by the preset vibration acceleration sensor, and transmitting the current running state electric signal to the data acquisition instrument debugging device; transmitting the displacement change electric signal and the current running state electric signal to the TCE software for data analysis by the data acquisition instrument debugging device to generate the corresponding digital signal, and sending the digital signal to the air charging and discharging controller.

[0044] It should be noted that, as shown in Figure 4 The PC end RPC Pro software of the embodiment of the present application controls the 24-channel whole vehicle road simulation test machine to load the simulated road signal, and controls the 24-channel whole vehicle road simulation test machine to run according to the predetermined simulated road signal. Before the test, the MTS cRPC Pro software loads the road load spectrum, opens the eDAQ data acquisition instrument debugging device, runs the TCE software, connects the air charging and discharging controller with the stabilized power supply, and completes the above preparation work.

[0045] In the specific implementation process, the embodiment of the present application can identify the height change of the four relevant positions of the test vehicle from the ground by the guyed displacement sensor and transmit the identified signal to the eDAQ data acquisition instrument to collect the displacement change electric signal.

[0046] Secondly, the embodiment of the present application also needs to identify the current running state electric signal (i.e. identify the static and dynamic state) of the MTS whole vehicle road simulation test machine by the vibration acceleration sensor, and transmit the identified signal to the data acquisition instrument of the eDAQ.

[0047] Further, the embodiment of the present application can use the eDAQ data acquisition instrument to receive data from the guyed displacement sensor and the vibration acceleration sensor, and transmit the data to the TCE software in real time for real-time data analysis and processing, and convert the data into digital signals and transmit the digital signals to the air charging and discharging controller.

[0048] Therefore, the embodiment of the present application collects displacement and test machine state data by multiple devices in cooperation, and combines the TCE software for accurate analysis, so as to provide reliable digital signals for the air charging and discharging controller, and ensure the accuracy of the vehicle related test and the timeliness of the controller response.

[0049] In step S102, the state type of the current running state electrical signal is judged, and when the state type is a vibration state, the preset air compressor is closed by the air charging and discharging controller. In step S103, when the state type is a static state, the air charging and discharging controller is used to charge and discharge the air springs at different positions for adjustment and overload protection, so as to adjust the height of the air springs.

[0050] After that, the embodiment of the application can judge the real-time running state of the MTS whole vehicle road simulation test machine: if in a vibration state, the preset air compressor is closed by the air charging and discharging controller after receiving the digital signal; if in a static state, the preset electromagnetic distribution valve and air compressor are opened by the controller after receiving the real-time data, so as to charge and discharge the air springs at different positions for adjustment and overload protection, thereby realizing the height adjustment of the air springs.

[0051] Therefore, the embodiment of the application can charge and discharge the air springs of the test vehicle according to the real-time running state of the MTS whole vehicle road simulation test machine, and can take into account the height adjustment and overload protection, so as to ensure the stability of the equipment and the accuracy of the test, and improve the reliability of the whole vehicle road simulation test.

[0052] Optionally, in an embodiment of the application, when the state type is a static state, the air charging and discharging controller is used to charge and discharge the air springs at different positions for adjustment and overload protection, so as to adjust the height of the air springs, including: when the air charging and discharging controller receives the digital signal, the preset electromagnetic distribution valve and air compressor are automatically controlled to run, so as to send the air path control signal to the electromagnetic distribution valve and the running or stopping signal to the air compressor by the air charging and discharging controller, so as to control the air compressor to charge the air path opened by the electromagnetic distribution valve, and adjust the height of the air springs; the height of the air springs is judged to be out of the preset height floating interval, and in the case that the height of the air springs is out of the height floating interval, the signal connection with the air charging and discharging controller is automatically disconnected by the TCE software.

[0053] After the test starts, when the vibration acceleration sensor identifies that the current whole vehicle road simulation test machine is in a vibration state, the air charging and discharging controller receives the real-time data (i.e. the digital signal) of the TCE software, and controls the air compressor not to work; when the whole vehicle road simulation test machine is in a static state, the air charging and discharging controller receives the real-time data of the TCE software, and controls the electromagnetic distribution valve and the air compressor to work, so as to charge and discharge the air springs at different positions for adjustment; specifically, the embodiment of the application can send the air path control signal to the electromagnetic distribution valve and the running or stopping signal to the air compressor by the air charging and discharging controller, so as to control the air compressor to charge the air path opened by the electromagnetic distribution valve, i.e. to charge and discharge the left front / right front / left rear / right rear air springs, and complete the height adjustment action of the air springs.

[0054] It should be noted that the embodiment of the present application is applicable to the air spring height adjustment work of all test vehicles applying air spring shock absorbers during the whole vehicle road simulation test. While adjusting the air spring height, the embodiment of the present application also needs to synchronously perform overload protection. The overload is not a real air spring overload, but refers to a height floating interval of ±20 mm added during calibration. If the interval exceeds ±20 mm, the TCE software automatically disconnects the signal connection with the charge and discharge controller.

[0055] Therefore, the embodiment of the present application collects the electric signals from the vibration acceleration sensor and the in-line displacement sensor in real time through the data acquisition instrument, and transmits the electric signals to the TCE software for real-time processing, and transmits the charge and discharge controller. When the test is intermittently stopped, the electromagnetic distribution valve and the air compressor are controlled to run, the air spring of the test vehicle is charged and discharged, the air spring height is adjusted in real time, the test is stopped due to the overrun of the test equipment is avoided, and the test is ensured to be smoothly performed.

[0056] According to the air spring height constant control method for whole vehicle road simulation test provided by the embodiment of the present application, the test vehicle is installed on the preset MTS whole vehicle road simulation test machine, the test vehicle is connected with the preset in-line displacement sensor and vibration acceleration sensor, the in-line displacement sensor and vibration acceleration sensor are calibrated, and after the calibration is completed, the corresponding electric equipment is restarted. The displacement change electric signal of the preset test vehicle and the current running state electric signal of the preset MTS whole vehicle road simulation test machine are collected, and a digital signal corresponding to each electric signal is generated, and the digital signal is sent to the preset charge and discharge controller. The current running state electric signal of the MTS whole vehicle road simulation test machine is judged. When the current running state electric signal of the whole vehicle road simulation test machine is in a vibration state, the digital signal is received by the preset charge and discharge controller, and the preset air compressor is closed. When the state type is a static state, the air spring at each position is adjusted and protected by the charge and discharge controller to adjust the height of the air spring. The embodiment of the present application collects the electric signals from the vibration acceleration sensor and the in-line displacement sensor in real time through the data acquisition instrument, and transmits the electric signals to the TCE software for real-time processing, and transmits the charge and discharge controller. When the test is intermittently stopped, the electromagnetic distribution valve and the air compressor are controlled to run, the air spring of the test vehicle is charged and discharged, the air spring height is adjusted in real time, the test is stopped due to the overrun of the test equipment is avoided, and the test is ensured to be smoothly performed, which expands the field of whole vehicle road simulation test.

[0057] Secondly, the air spring height constant control device for whole vehicle road simulation test provided by the embodiment of the present application is described with reference to the accompanying drawings.

[0058] Figure 5is a block schematic view of a constant height control device of an air spring of a whole vehicle road simulation test of an embodiment of the present application.

[0059] As shown in Figure 5 The constant height control device 10 of the air spring of the whole vehicle road simulation test comprises a collection module 100, a judgment module 200 and a height adjustment module 300.

[0060] The collection module 100 is configured to collect displacement change electric signals of a preset test vehicle and current running state electric signals of a preset MTS whole vehicle road simulation test machine, and generate digital signals corresponding to each electric signal, and send the digital signals to a preset air charging and discharging controller.

[0061] The judgment module 200 is configured to judge a state type of the current running state electric signals, and when the state type is a vibration state, the preset air compressor is closed by the air charging and discharging controller.

[0062] The height adjustment module 300 is configured to, when the state type is a static state, perform air charging and discharging adjustment and overload protection on the air springs at each position by the air charging and discharging controller, so as to adjust the height of the air springs.

[0063] Optionally, in an embodiment of the present application, the constant height control device of the air spring of the whole vehicle road simulation test further comprises a mounting module and a connecting module.

[0064] The mounting module is configured to mount the test vehicle on the MTS whole vehicle road simulation test machine before collecting the displacement change electric signals of the preset test vehicle and the current running state electric signals of the preset MTS whole vehicle road simulation test machine, and arrange two pull-wire displacement sensors at positions where the front subframe and the rear subframe of the test vehicle are at the same height from the test iron floor, and connect the four pull-wire displacement sensors to a preset data acquisition instrument debugging device.

[0065] The connecting module is configured to connect a preset electromagnetic distribution valve to the air compressor, so as to perform air charging and discharging on the air springs of the test vehicle and adjust the height according to a preset height, and connect the adjusted air springs to a preset TCE software, so as to perform zero height calibration.

[0066] Optionally, in an embodiment of the present application, the collection module 100 comprises a running unit, a first identification unit, a second identification unit and a generation unit.

[0067] The running unit is configured to load a preset road load spectrum, and start the preset data acquisition instrument debugging device, so as to run the preset TCE software.

[0068] The first identification unit is configured to identify height change information of four relevant positions of the test vehicle from the ground by using a preset pull wire displacement sensor, and transmit the height change information to the data acquisition instrument debugging device to collect corresponding displacement change electrical signals.

[0069] The second identification unit is configured to identify current operation state electrical signals of the MTS whole vehicle road simulation test machine by using a preset vibration acceleration sensor, and transmit the current operation state electrical signals to the data acquisition instrument debugging device.

[0070] The generation unit is configured to transmit the displacement change electrical signals and the current operation state electrical signals to the TCE software for data analysis by using the data acquisition instrument debugging device, to generate corresponding digital signals, and transmit the digital signals to the air charging and discharging controller.

[0071] Optionally, in an embodiment of the present application, the height adjustment module 300 comprises a control unit and an overload protection unit.

[0072] The control unit is configured to automatically control the preset electromagnetic distribution valve and the air compressor to operate when the air charging and discharging controller receives the digital signals, to transmit an air path control signal to the electromagnetic distribution valve and an operation or stop signal to the air compressor by using the air charging and discharging controller, to control the air compressor to charge the air path opened by the electromagnetic distribution valve, and to adjust the height of the air spring.

[0073] The overload protection unit is configured to judge whether the height of the air spring exceeds a preset height floating interval, and automatically disconnect the signal connection with the air charging and discharging controller by using the TCE software when the height of the air spring exceeds the height floating interval.

[0074] Optionally, in an embodiment of the present application, the whole vehicle road simulation test air spring height constant control device 10 of the embodiment of the present application further comprises a display module and an alarm module.

[0075] The display module is configured to be connected between the air compressor and the electromagnetic distribution valve by using a preset electronic air pressure gauge, to display a current air pressure value.

[0076] The alarm module is configured to judge whether the current air pressure value is greater than a preset minimum air pressure required for the test or a rated air pressure of the air spring, and to control the electronic air pressure gauge to perform an automatic alarm operation when the current air pressure value is greater than the minimum air pressure required for the test or the rated air pressure of the air spring.

[0077] It should be noted that the foregoing explanation and description of the embodiment of the whole vehicle road simulation test air spring height constant control method are also applicable to the embodiment of the whole vehicle road simulation test air spring height constant control device, which will not be described herein again.

[0078] The whole vehicle road simulation test air spring height constant control device provided by the embodiment of the application comprises a calibration module 100, which is used for installing a test vehicle on a preset MTS whole vehicle road simulation test machine, connecting the test vehicle with a preset inextensible displacement sensor and a vibration acceleration sensor, calibrating the inextensible displacement sensor and the vibration acceleration sensor, and restarting a corresponding electric device after calibration is completed; a collection module 200, which is used for collecting a displacement change electric signal of the preset test vehicle and a current running state electric signal of the preset MTS whole vehicle road simulation test machine, generating a digital signal corresponding to each electric signal, and sending the digital signal to a preset air charging and discharging controller; and a height adjustment module 300, which is used for judging the current running state electric signal of the MTS whole vehicle road simulation test machine, receiving the digital signal by the preset air charging and discharging controller when the current running state electric signal of the whole vehicle road simulation test machine is a vibration state, and closing the preset air compressor, and when the state type is a static state, adjusting the height of the air spring by air charging and discharging adjustment and overload protection of the air spring at each position through the air charging and discharging controller. The application collects the electric signals from the vibration acceleration sensor and the inextensible displacement sensor in real time through a data collection instrument, transmits the electric signals to a TCE software for real-time processing, and transmits the air charging and discharging controller, so that the electromagnetic distribution valve and the air compressor are controlled to operate when the test is intermittently stopped, the air spring of the test vehicle is charged and discharged, the height of the air spring is adjusted in real time, the test is stopped due to the over-limit of the test equipment is avoided, the test is ensured to be successfully performed, and the field of whole vehicle road simulation test is expanded.

[0079] Figure 6 The structure schematic diagram of the electronic device provided by the embodiment of the application is provided. The electronic device can comprise: The memory 601, the processor 602, and the computer program stored in the memory 601 and executable on the processor 602.

[0080] The processor 602 implements the whole vehicle road simulation test air spring height constant control method provided in the above embodiment when executing the program.

[0081] Further, the electronic device further comprises: The communication interface 603 is used for communication between the memory 601 and the processor 602.

[0082] The memory 601 is used for storing the computer program executable on the processor 602.

[0083] The memory 601 can comprise a high-speed RAM memory, and can also comprise a non-volatile memory, for example, at least one disk memory.

[0084] If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 can be connected with each other through a bus and complete communication between each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, Figure 6 Only one thick line is used to represent the bus in the figure, but it does not mean that there is only one bus or only one type of bus.

[0085] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can complete communication between each other through an internal interface.

[0086] The processor 602 can be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement one or more embodiments of the present application.

[0087] The embodiment of the present application further provides a computer readable storage medium, which has a computer program stored thereon, and the program is executed by a processor to implement the whole vehicle road simulation test air spring height constant control method.

[0088] The embodiment of the present application further provides a computer program product, which includes a computer program, and the computer program is executed to implement the whole vehicle road simulation test air spring height constant control method.

[0089] In the description of the application, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, the usage of "N" means at least two, for example, two, three or the like, unless explicitly stated otherwise.

[0090] Furthermore, the terms "first", "second", or the like, are used merely as a designation of certain elements or features of the application, and do not imply or connote relative importance or a specific order of precedence. Thus, features defined with "first", "second", etc. can include at least one of the features, either explicitly or implicitly.

[0091] Any process or method descriptions or blocks in flow charts or otherwise described herein represent embodiments of modules, segments, or portions of code which include one or more executable instructions for implementing specific logic functions or steps, and alternate implementations are possible. In some embodiments, the processes or methods described in flow charts or otherwise described herein are not necessarily performed in the order shown or discussed, including, for example, as performed by a computer processor. Alternate implementations can perform functions or steps described in different orders, including simultaneously or in reverse order.

[0092] The logic and / or steps represented in the flowcharts and / or described herein, for example, can be considered as a sequence of executable instructions stored in a computer readable medium, which can be executed by an instruction execution system, apparatus or device, such as a computer-based system, a processor-based system, or other system that can fetch the instructions from the instruction execution system, apparatus or device and execute the instructions, or a combination of the above. For the purposes of this specification, a "computer readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus or device. The computer readable medium can be a computer readable storage medium or a computer readable signal medium. The computer readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a propagation medium. The computer readable signal medium can include, but is not limited to, a computer readable medium that facilitates transfer of the program from one place to another. A specific example of a computer readable medium is a non-transitory computer-readable storage medium. A specific example of a computer readable signal medium is a source or destination of the computer readable medium. Another specific example of a computer readable signal medium is a computer readable signal travelling through space. Thus, a computer readable medium can take many forms of hardware to carry out the program for use by or in connection with the instruction execution system, apparatus or device.

[0093] It should be understood that aspects of the application can be implemented in hardware, software, firmware or a combination thereof. In the above embodiments, the N steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware and in another embodiment, the hardware can be implemented with any or a combination of the following technologies, which are all well known in the art: a discrete logic circuit(s) having logic gates for implementing logic functions upon an application of data signals, an application specific integrated circuit having appropriate combinational logic gates, a programmable gate array(s) (PGA), a field programmable gate array (FPGA), etc.

[0094] Those of skill in the art would understand that the steps of the methods carried out above can be carried out wholly or partly by a program instructing relevant hardware, and the program can be stored in a computer readable storage medium, and when executed, includes one or a combination of the steps of the method embodiments.

[0095] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing module, or each of the units can be physically present separately, or two or more units can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0096] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method for controlling the height of an air spring in a constant manner during a vehicle road simulation test, characterized by, The method comprises the following steps: Collecting displacement change electric signals of a preset test vehicle and current running state electric signals of a preset MTS whole vehicle road simulation test machine, and generating digital signals corresponding to each electric signal, and sending the digital signals to a preset air charging and discharging controller; When the state type is a vibration state, closing a preset air compressor through the air charging and discharging controller; When the state type is a static state, adjusting and overload protecting the air springs at each position through the air charging and discharging controller to adjust the height of the air springs.

2. The method of claim 1, wherein the height of the air spring is controlled to be constant during the test. Before collecting the displacement change electric signals of the preset test vehicle and the current running state electric signals of the preset MTS whole vehicle road simulation test machine, the method further comprises: Mounting the test vehicle on the MTS whole vehicle road simulation test machine, and arranging two pull-wire displacement sensors at positions where the front subframe and the rear subframe of the test vehicle are at the same height from the test iron floor, and connecting the four pull-wire displacement sensors to a preset data acquisition instrument debugging device; Connecting the air compressor to a preset electromagnetic distribution valve to charge and discharge the air springs of the test vehicle and adjust the height according to a preset height, and connecting the adjusted air springs to a preset TCE software to calibrate the zero height.

3. The method of claim 1, wherein the height of the air spring is controlled to be constant during the test. The collecting of the displacement change electric signals of the preset test vehicle and the current running state electric signals of the preset MTS whole vehicle road simulation test machine, and the generation of digital signals corresponding to each electric signal, and the sending of the digital signals to the preset air charging and discharging controller, comprises: Loading a preset road load spectrum, and starting the preset data acquisition instrument debugging device to run the preset TCE software; Identifying height change information of four relevant positions of the test vehicle from the ground by the preset pull-wire displacement sensors, and transmitting the height change information to the data acquisition instrument debugging device to collect corresponding displacement change electric signals; Identifying the current running state electric signals of the MTS whole vehicle road simulation test machine by the preset vibration acceleration sensors, and transmitting the current running state electric signals to the data acquisition instrument debugging device; Transmitting the displacement change electric signals and the current running state electric signals to the TCE software by the data acquisition instrument debugging device for data analysis to generate corresponding digital signals, and sending the digital signals to the air charging and discharging controller.

4. The method of claim 3, wherein the height of the air spring is controlled to be constant during the test. The adjusting of the height of the air springs by the air charging and discharging controller when the state type is a static state, comprises: When the air charging and discharging controller receives the digital signals, automatically controlling a preset electromagnetic distribution valve and the air compressor to run, sending an air path control signal to the electromagnetic distribution valve and a running or stopping signal to the air compressor through the air charging and discharging controller to control the air compressor to charge the air path opened by the electromagnetic distribution valve to adjust the height of the air springs. judging whether the height of the air spring exceeds a preset height floating interval, wherein, in the case that the height of the air spring exceeds the height floating interval, the signal connection with the charge and discharge controller is automatically disconnected by the TCE software.

5. The method of claim 4, wherein the height of the air spring is controlled to be constant during the test. Further comprising: connecting a preset electronic air gauge between the air compressor and the electromagnetic distribution valve to display a current air pressure value; judging whether the current air pressure value is greater than a preset minimum air pressure required for the test or an air spring rated air pressure, wherein, in the case that the current air pressure value is greater than the minimum air pressure required for the test or the air spring rated air pressure, the electronic air gauge is controlled to automatically perform an alarm operation.

6. A constant height control device for an air spring during a vehicle road simulation test, characterized in that, including: a collection module, configured to collect displacement change electric signals of a preset test vehicle and current running state electric signals of a preset MTS whole vehicle road simulation test machine, and generate digital signals corresponding to each electric signal, and send the digital signals to a preset charge and discharge controller; a judgment module, configured to judge a state type of the current running state electric signals, and when the state type is a vibration state, the preset air compressor is turned off by the charge and discharge controller; a height adjustment module, configured to, when the state type is a static state, perform charge and discharge adjustment and overload protection on air springs at each position by the charge and discharge controller, so as to adjust the height of the air springs.

7. The vehicle road simulation test air spring height constant control device according to claim 6, characterized by Further comprising: an installation module, configured to install the test vehicle on the MTS whole vehicle road simulation test machine before collecting the displacement change electric signals of the test vehicle and the current running state electric signals of the MTS whole vehicle road simulation test machine, and arrange two pull-wire displacement sensors at positions where the front subframe and the rear subframe of the test vehicle are at the same height from the test iron floor, and connect the four pull-wire displacement sensors to a preset data acquisition instrument debugging device; a connection module, configured to connect the air compressor to a preset electromagnetic distribution valve, so as to perform charge and discharge on the air springs of the test vehicle and adjust the height according to a preset height, and connect the adjusted air springs to a preset TCE software to perform zero height calibration.

8. The vehicle road simulation test air spring height constant control device according to claim 6, characterized by The collection module includes: a running unit, configured to load a preset road load spectrum, and start a preset data acquisition instrument debugging device, so as to run a preset TCE software; a first identification unit, configured to identify height change information of four relevant positions of the test vehicle from the ground by a preset pull-wire displacement sensor, and transmit the height change information to the data acquisition instrument debugging device, so as to collect corresponding displacement change electric signals; a second identification unit, configured to identify current running state electric signals of the MTS whole vehicle road simulation test machine by a preset vibration acceleration sensor, and transmit the current running state electric signals to the data acquisition instrument debugging device; a generation unit, configured to transmit the displacement change electric signals and the current running state electric signals to the TCE software for data analysis by the data acquisition instrument debugging device, so as to generate corresponding digital signals, and send the digital signals to the charge and discharge controller.

9. An electronic device, comprising: including: A memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the whole vehicle road simulation test air spring height constant control method according to any one of claims 1-5.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the whole vehicle road simulation test air spring height constant control method according to any one of claims 1-5.

11. A computer program product comprising a computer program, characterized in that, The computer program is executed to implement the whole vehicle road simulation test air spring height constant control method according to any one of claims 1-5.

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