Control system and method for hydraulic cylinder, hydraulic support and hydraulic system

Abstract

The invention provides a control system and method for a hydraulic cylinder, a hydraulic support and a hydraulic system.The control system comprises the hydraulic cylinder, a piston is arranged in the hydraulic cylinder, the hydraulic cylinder is connected with a flow meter and at least one sensor, the hydraulic cylinder is connected with a speed regulating valve through a hydraulic pipeline, and the speed regulating valve is connected with a controller through an electro-hydraulic control reversing valve; a stroke closed-loop control algorithm is arranged in the controller, the flow meter and the sensor are connected with the controller through the edge server, and a stroke calculation algorithm for the piston is arranged in the edge server. The influence of different factors on the flow monitoring accuracy is considered, and the obtained stroke result of the piston in the hydraulic cylinder is more accurate in the modes of compensation, flow stroke mapping and the like; a closed-loop control algorithm is adopted, the flow of a hydraulic cylinder is controlled through a speed regulating valve capable of controlling the flow of the hydraulic cylinder, and closed-loop control over the stroke of a piston in the closed-loop pressure cylinder is achieved in combination with hydraulic cylinder stroke monitoring.

Description

Technical Field

[0001] This disclosure relates to the technical field of hydraulic control, and more specifically, to a control system, method, hydraulic support, and hydraulic system for a hydraulic cylinder. Background Technology

[0002] Existing hydraulic cylinder stroke testing technologies generally employ external and internal stroke sensors. External methods mostly use draw-wire displacement sensors, which are characterized by their compact structure, long measurement stroke, low cost, and easy-to-implement control programs. However, their installation requires high precision in terms of angle, parallelism, and environmental cleanliness, otherwise, their service life will be affected. Internal methods mostly use magnetostrictive displacement sensors, which are characterized by their high detection accuracy and high sensor response frequency, making them suitable for high-precision and high-speed detection applications. However, their structure is more complex, requiring the use of hollow piston rods, and manufacturing is difficult for long strokes. In high-pressure systems, high-pressure resistant measures are required, and the cost is too high. Summary of the Invention

[0003] The purpose of this disclosure is to provide a control system, method, hydraulic support, and hydraulic system for hydraulic cylinders to solve the aforementioned problems in the prior art.

[0004] To address the aforementioned technical problems, one embodiment of this disclosure provides a control system for a hydraulic cylinder, comprising at least one hydraulic cylinder, a piston disposed within the hydraulic cylinder, the hydraulic cylinder being connected to a flow meter and at least one sensor, the hydraulic cylinder being connected to a speed control valve via a hydraulic pipeline, the speed control valve being connected to a controller via an electro-hydraulic directional valve, the controller being configured with a stroke closed-loop control algorithm, the flow meter and the sensor being connected to the controller via an edge server, and the edge server being configured with a stroke calculation algorithm for the piston.

[0005] In some embodiments, the flow meter is an ultrasonic flow meter or a turbine flow meter.

[0006] In some embodiments, the ultrasonic flow meter is disposed outside the hydraulic pipeline or the turbine flow meter is connected inside the hydraulic pipeline.

[0007] In some embodiments, the sensor is integrated into the hydraulic cylinder or mounted on the hydraulic pipeline.

[0008] In some embodiments, the sensor includes a temperature sensor and a pressure sensor.

[0009] In some embodiments, the hydraulic cylinder is at least one of the following: a control side protection hydraulic cylinder, a telescopic beam hydraulic cylinder, a bottom lifting hydraulic cylinder, a side protection hydraulic cylinder, and a column hydraulic cylinder.

[0010] In some embodiments, a centralized control device is also included, which is connected to the controller and is used to monitor different hydraulic cylinders.

[0011] One embodiment of this disclosure provides a hydraulic support, including the control system described in any of the preceding claims.

[0012] One embodiment of this disclosure provides a hydraulic system, which includes at least one hydraulic support as described above, the hydraulic support being disposed on a fully mechanized mining face.

[0013] One embodiment of this disclosure provides a control method for a hydraulic cylinder, comprising:

[0014] Obtain the flow rate, temperature, and pressure values ​​of the fluid inside the hydraulic cylinder;

[0015] Based on the flow rate value, the temperature value, and the pressure value, the flow rate value is obtained by processing the data using a temperature and pressure compensation algorithm and a flow smoothing algorithm.

[0016] Based on the processed flow rate value, the stroke data of the piston inside the hydraulic cylinder is obtained through a flow-stroke mapping algorithm.

[0017] In some embodiments, it also includes:

[0018] Fault feature identification is performed based on the processed flow rate, temperature, and pressure values ​​using a long short-term memory network algorithm.

[0019] This disclosure combines a flow meter and sensors to monitor and acquire the flow rate of the hydraulic cylinder. Considering the influence of various factors on the accuracy of flow monitoring, compensation and flow-stroke mapping are used to make the acquired piston stroke results in the hydraulic cylinder more accurate. By employing a closed-loop control algorithm, a speed regulating valve that controls the flow rate through the hydraulic cylinder is used to control the flow rate. Combined with hydraulic cylinder stroke monitoring, closed-loop control of the piston stroke in the cylinder is achieved. Furthermore, based on monitoring data such as flow rate, pressure, and temperature, a long short-term memory network algorithm is used for fault feature identification, enabling the monitoring of the hydraulic system's status and faults. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the control system for a hydraulic cylinder according to an embodiment of the present disclosure;

[0022] Figure 2 This is a schematic flowchart of stroke control in a control system for a hydraulic cylinder according to an embodiment of the present disclosure;

[0023] Figure 3 This is a schematic diagram of the steps of a control method for a hydraulic cylinder according to an embodiment of the present disclosure.

[0024] Figure label:

[0025] 1-Hydraulic cylinder; 2-Flow meter; 3-Speed ​​control valve; 4-Pressure sensor; 5-Temperature sensor; 6-Electro-hydraulic directional valve; 7-Controller; 8-Edge server; 9-Centralized control device. Detailed Implementation

[0026] Various embodiments and features of this disclosure are described herein with reference to the accompanying drawings.

[0027] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.

[0028] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0029] These and other features of this disclosure will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0030] It should also be understood that although this disclosure has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this disclosure, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0031] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0032] Specific embodiments of this disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this disclosure and can be implemented in various ways. Well-known and / or repetitive functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure this disclosure. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use them in a substantially arbitrary manner.

[0033] This disclosure provides a control system for a hydraulic cylinder, such as... Figure 1 As shown, the control system is used to control the flow rate of the hydraulic cylinder 1. The hydraulic cylinder 1 is installed inside the hydraulic support, which is installed on the fully mechanized coal mining face. At least one hydraulic cylinder 1 can be installed inside the hydraulic support, and different hydraulic cylinders 1 can be used to achieve different functions for the hydraulic support.

[0034] Specifically, a piston is installed inside the hydraulic cylinder 1, and the movement of the piston is used to control the movement of the hydraulic support. Specifically, the control system of this embodiment can control the stroke of the piston inside the hydraulic cylinder 1, as well as identify and detect faults in the hydraulic cylinder 1.

[0035] Specifically, the control system includes at least one hydraulic cylinder 1, which is connected to a flow meter 2. The flow meter 2 is used to obtain the flow rate of the liquid in the hydraulic cylinder 1. The hydraulic cylinder 1 is connected to a speed control valve 3 via a hydraulic pipeline. The speed control valve 3 is connected to a controller 7 via an electro-hydraulic directional valve 6.

[0036] Furthermore, the flow meter 2 here can be an ultrasonic flow meter or a turbine flow meter. The ultrasonic flow meter is a non-invasive flow meter. The ultrasonic flow meter can be installed outside the hydraulic pipeline between the hydraulic cylinder 1 and the electro-hydraulic directional valve 6, for example, by means of an external clamp. This not only eliminates the need to disassemble the pipeline during installation, but also does not affect the original hydraulic system. The turbine flow meter can be connected inside the hydraulic pipeline between the hydraulic cylinder 1 and the electro-hydraulic directional valve 6.

[0037] Furthermore, the speed regulating valve 3 is used to control the flow rate of the liquid in the hydraulic cylinder 1, and it can be a hydraulic valve with flow regulation function.

[0038] Furthermore, the electro-hydraulic directional valve 6 can be connected to the speed control valve 3 of one or more hydraulic cylinders 1, and is used to control the action of different hydraulic cylinders 1 in the hydraulic support. Here, the hydraulic cylinder 1 can be a control hydraulic cylinder for the side guard, a hydraulic cylinder for the telescopic beam, a hydraulic cylinder for the bottom lifting, a hydraulic cylinder for the side guard, a hydraulic cylinder for the column, etc. The electro-hydraulic directional valve 6 can also have a flow regulation function.

[0039] Furthermore, the controller 7 is installed on the actuator of the hydraulic support, for example, on the four-bar linkage of the hydraulic support. The controller 7 is equipped with a stroke closed-loop control algorithm for the piston of the hydraulic cylinder 1 to control the movement of the piston in each hydraulic cylinder 1.

[0040] Considering that existing technologies typically use a single flow sensor for stroke monitoring, but the actual flow rate monitoring result is related to the pressure and temperature values ​​in the hydraulic system, resulting in a certain deviation between the actual flow rate of the hydraulic cylinder and the monitored value, and that traditional flow monitoring lacks closed-loop control and hydraulic system status monitoring functions, this is further addressed by connecting the hydraulic cylinder 1 to at least one sensor, such as at least a pressure sensor 4 and a temperature sensor 5. The pressure sensor 4 measures the pressure of the liquid in the hydraulic cylinder 1, and the temperature sensor 5 measures the temperature of the liquid in the hydraulic cylinder 1. For example, the pressure sensor 4 and the temperature sensor 5 can be integrated into the hydraulic cylinder 1, or they can be installed on the hydraulic pipeline between the hydraulic cylinder 1 and the electro-hydraulic directional valve 6 to achieve the measurement.

[0041] Furthermore, the flow meter 2 and at least one of the sensors are connected to the edge server 8. The edge server 8 can wirelessly communicate with the flow meter 2 and the sensors via various communication methods such as 5G, RS-485, and RS-232, enabling rapid wireless signal transmission without spatial limitations. The edge server 8 has data caching and data analysis processing functions, and for example, it has a built-in piston stroke calculation algorithm, which includes a compensation algorithm, a flow smoothing algorithm, and a flow stroke mapping algorithm.

[0042] Furthermore, the controller 7 is connected to the centralized control device 9. When there are multiple hydraulic cylinders 1, the centralized control device 9 can be used to monitor and control data such as the flow rate, temperature, and pressure of the liquid in different hydraulic cylinders 1.

[0043] like Figure 2As shown, in a specific embodiment, after the flow meter 2, the pressure sensor 4 and the temperature sensor 5 respectively collect the initial data such as the flow rate, pressure and temperature of the liquid in the hydraulic cylinder 1, the initial data such as the flow rate, pressure and temperature are processed by, for example, a temperature and pressure compensation algorithm and the flow smoothing algorithm.

[0044] Specifically, considering that the flow rate of the hydraulic cylinder 1 is affected by the temperature and pressure of the liquid, the flow rate of the flow meter 2 can be adjusted according to the actual temperature and pressure by using the pressure-temperature-flow relationship obtained from the pre-set test based on the temperature and pressure compensation algorithm. The flow smoothing algorithm is used to reduce noise and stabilize the flow rate of the flow meter 2. For example, Kalman filtering can be used to predict and correct the flow rate data based on the reading of the flow meter 2 and the dynamic model of the system.

[0045] Furthermore, after processing the flow rate data of the hydraulic cylinder 1 within a predetermined time using the temperature and pressure compensation algorithm and the flow smoothing algorithm, and combining it with the effective working area of ​​the hydraulic cylinder 1, the flow rate stroke mapping algorithm and other artificial intelligence algorithms (such as neural networks) are used to train a mapping model between the flow rate value and the stroke data of the piston in the hydraulic cylinder 1. Thus, the stroke data of the piston in the hydraulic cylinder 2 at any time can be obtained through the acquired real-time flow rate data.

[0046] Furthermore, the processed data of flow rate, temperature, and pressure of the hydraulic cylinder 1, along with the calculated stroke data of the piston within the hydraulic cylinder 1, can be uploaded to the controller 7 via, for example, a gigabit ring network. The stroke closed-loop control algorithm within the controller 7 then processes the data. This multi-sensor fusion for flow detection of the hydraulic cylinder 1 helps to achieve the hydraulic cylinder stroke closed-loop control function and the hydraulic system status monitoring function.

[0047] Specifically, by receiving the target value of the piston stroke in the hydraulic cylinder 1 manually input into the controller 7 or issued by the centralized control device 9, the flow rate of the hydraulic cylinder 1 is controlled by the electro-hydraulic directional valve 6 or the speed regulating valve 3, thereby achieving closed-loop control of the piston stroke in the hydraulic cylinder 1.

[0048] Furthermore, the controller 7 or the centralized control device 9 can perform sensor calibration and configuration on the flow meter 2 and the sensor, and automatically zero or calibrate the measured piston stroke in the hydraulic cylinder 1 when the piston of the hydraulic cylinder 1 is fully retracted or fully extended; in addition, calibration and configuration also help to train the flow stroke mapping algorithm based on the edge server 8, which can prevent the accumulation error of stroke data measurement and improve the accuracy of the flow stroke mapping algorithm.

[0049] Thus, by using the flow meter 2 to obtain the stroke data of the piston inside the hydraulic cylinder 1, and considering the measurement error and data fluctuation of the flow meter 2, the temperature and pressure compensation algorithm is used to compensate for the measured flow data, and the flow smoothing algorithm is used to stabilize the flow reading while eliminating singularities. Furthermore, due to factors such as liquid leakage, detection errors, and calculation conversion errors, a flow-stroke mapping algorithm is trained to obtain the mapping relationship between the piston stroke data and the flow value, enabling more accurate estimation of the piston stroke data from the flow data.

[0050] In this embodiment, the monitoring data such as the flow rate, temperature, and pressure of the liquid in the hydraulic cylinder 1 can be used to diagnose the status of different hydraulic supports in the hydraulic system. By long-term monitoring of the flow rate, temperature, and pressure of the liquid in different hydraulic cylinders 1 of different hydraulic supports in the hydraulic system, combined with the Long Short-Term Memory Network algorithm, fault feature identification can be performed, thereby monitoring faults such as leakage, blockage, overheating, cavitation, or cavitation in the hydraulic system.

[0051] This disclosure combines a flow meter and sensors to monitor and acquire the flow rate of the hydraulic cylinder. Considering the influence of various factors on the accuracy of flow monitoring, compensation and flow-stroke mapping are used to make the acquired piston stroke results in the hydraulic cylinder more accurate. By employing a closed-loop control algorithm, a speed regulating valve that controls the flow rate through the hydraulic cylinder is used to control the flow rate. Combined with hydraulic cylinder stroke monitoring, closed-loop control of the piston stroke in the cylinder is achieved. Furthermore, based on monitoring data such as flow rate, pressure, and temperature, a long short-term memory network algorithm is used for fault feature identification, enabling the monitoring of the hydraulic system's status and faults.

[0052] The second embodiment of this disclosure provides a control method for a hydraulic cylinder, which is implemented based on the control system involved in the first embodiment described above, such as... Figure 3 As shown, the control method includes:

[0053] S101, obtain the flow rate, temperature and pressure values ​​of the liquid in the hydraulic cylinder;

[0054] S102, Based on the flow rate value, temperature value, and pressure value, the flow rate value is obtained by processing them using a temperature and pressure compensation algorithm and a flow smoothing algorithm;

[0055] S103, based on the processed flow rate value, obtain the stroke data of the piston in the hydraulic cylinder through a flow stroke mapping algorithm.

[0056] In addition, it also includes:

[0057] Fault feature identification is performed based on the processed flow rate, temperature, and pressure values ​​using a long short-term memory network algorithm.

[0058] This disclosure combines a flow meter and sensors to monitor and acquire the flow rate of the hydraulic cylinder. Considering the influence of various factors on the accuracy of flow monitoring, compensation and flow-stroke mapping are used to make the acquired piston stroke results in the hydraulic cylinder more accurate. By employing a closed-loop control algorithm, a speed regulating valve that controls the flow rate through the hydraulic cylinder is used to control the flow rate. Combined with hydraulic cylinder stroke monitoring, closed-loop control of the piston stroke in the cylinder is achieved. Furthermore, based on monitoring data such as flow rate, pressure, and temperature, a long short-term memory network algorithm is used for fault feature identification, enabling the monitoring of the hydraulic system's status and faults.

[0059] A third embodiment of this disclosure provides a hydraulic support, the hydraulic support including at least one hydraulic cylinder and the control system described in any of the above embodiments.

[0060] This disclosure combines a flow meter and sensors to monitor and acquire the flow rate of the hydraulic cylinder. Considering the influence of various factors on the accuracy of flow monitoring, compensation and flow-stroke mapping are used to make the acquired piston stroke results in the hydraulic cylinder more accurate. By employing a closed-loop control algorithm, a speed regulating valve that controls the flow rate through the hydraulic cylinder is used to control the flow rate. Combined with hydraulic cylinder stroke monitoring, closed-loop control of the piston stroke in the cylinder is achieved. Furthermore, based on monitoring data such as flow rate, pressure, and temperature, a long short-term memory network algorithm is used for fault feature identification, enabling the monitoring of the hydraulic system's status and faults.

[0061] A fourth embodiment of this disclosure provides a hydraulic system including at least one hydraulic support as described in the third embodiment above, the hydraulic support being disposed on the fully mechanized mining face. When there are multiple hydraulic supports, the multiple hydraulic supports are arranged sequentially at intervals along the length of the fully mechanized mining face.

[0062] This disclosure combines a flow meter and sensors to monitor and acquire the flow rate of the hydraulic cylinder. Considering the influence of various factors on the accuracy of flow monitoring, compensation and flow-stroke mapping are used to make the acquired piston stroke results in the hydraulic cylinder more accurate. By employing a closed-loop control algorithm, a speed regulating valve that controls the flow rate through the hydraulic cylinder is used to control the flow rate. Combined with hydraulic cylinder stroke monitoring, closed-loop control of the piston stroke in the cylinder is achieved. Furthermore, based on monitoring data such as flow rate, pressure, and temperature, a long short-term memory network algorithm is used for fault feature identification, enabling the monitoring of the hydraulic system's status and faults.

[0063] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0065] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0066] In the embodiments provided in this application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0067] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0068] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0069] If the integrated module is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the above method embodiments. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0070] Furthermore, the features of the embodiments shown in the accompanying drawings or the various embodiments mentioned in this specification should not be construed as independent embodiments. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the accompanying drawings.

[0071] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control system for a hydraulic cylinder, characterized in that, It includes at least one hydraulic cylinder, a piston is installed inside the hydraulic cylinder, the hydraulic cylinder is connected to a flow meter and at least one sensor, the hydraulic cylinder is connected to a speed control valve through a hydraulic pipeline, the speed control valve is connected to a controller through an electro-hydraulic directional valve, the controller is equipped with a stroke closed-loop control algorithm, the flow meter and the sensor are connected to the controller through an edge server, and the edge server is equipped with a stroke calculation algorithm for the piston.

2. The control system according to claim 1, characterized in that, The flow meter is an ultrasonic flow meter or a turbine flow meter.

3. The control system according to claim 2, characterized in that, The ultrasonic flow meter is installed outside the hydraulic pipeline, or the turbine flow meter is connected inside the hydraulic pipeline.

4. The control system according to claim 1, characterized in that, The sensor is integrated into the hydraulic cylinder or installed on the hydraulic pipeline.

5. The control system according to claim 1, characterized in that, The sensors include a temperature sensor and a pressure sensor.

6. The control system according to claim 1, characterized in that, The hydraulic cylinder is at least one of the following: a hydraulic cylinder for controlling the side guard, a hydraulic cylinder for telescopic beams, a hydraulic cylinder for raising the bottom, a hydraulic cylinder for side protection, and a hydraulic cylinder for the column.

7. The control system according to claim 1, characterized in that, It also includes a centralized control device, which is connected to the controller and is used to monitor different hydraulic cylinders.

8. A hydraulic support, characterized in that, The control system comprising any one of claims 1-7.

9. A hydraulic system, characterized in that, The hydraulic system includes at least one hydraulic support as described in claim 8, the hydraulic support being disposed on the fully mechanized mining face.

10. A control method for a hydraulic cylinder, characterized in that, include: Obtain the flow rate, temperature, and pressure values ​​of the fluid inside the hydraulic cylinder; Based on the flow rate value, the temperature value, and the pressure value, the flow rate value is obtained by processing the data using a temperature and pressure compensation algorithm and a flow smoothing algorithm. Based on the processed flow rate value, the stroke data of the piston inside the hydraulic cylinder is obtained through a flow-stroke mapping algorithm.

11. The control method according to claim 10, characterized in that, Also includes: Fault feature identification is performed based on the processed flow rate, temperature, and pressure values ​​using a long short-term memory network algorithm.

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