Valve servo control mechanism and method

Abstract

The invention provides a valve servo control mechanism and method. The valve servo control mechanism comprises: a valve terminal comprising a plurality of electro-hydraulic servo valves; a plurality of valves connecting the valve terminal; and servo control equipment connected with the valve terminal and the plurality of valves, comprising: a controller output device for providing a control signal to the valve terminal; the controller input device is used for receiving a feedback signal from the used valve; the signal driving device is used for adjusting the control signal from the controller output device so as to be matched with the used electro-hydraulic servo valve; the signal conditioning device is used for adjusting a feedback signal from the used valve so as to be matched with the controller input device; and the isolation device is used for isolating the signal driving device and the signal conditioning device from the valve terminal, the plurality of valves, the controller output device and the controller input device.

Description

Technical Field

[0001] The present invention relates to the field of aero-engines, and more specifically, to a servo control mechanism and method related to a test stand valve. Background Art

[0002] Aircraft engines are designed with air extraction holes at the fourth, seventh, and tenth stages of the compressor. Through the air extraction pipeline, the gas during the operation of the engine can be introduced into the aircraft to provide a gas source for other positions with gas requirements such as the cockpit of the aircraft. Therefore, during engine tests, it is necessary to simulate and set up some air extraction control loops of the aircraft on the test stand. When the engine is in different test conditions, by adjusting the size of the engine air extraction volume, the influence of air extraction on the engine performance can be obtained, and at the same time, the performance of the engine in the installed state can be recorded. In order to better verify the performance of the engine under the air extraction state, it is required that the air extraction flow rate can be linked with the change of the engine conditions, which poses higher requirements for the precise control of the air extraction valve, such as control strategies, control algorithms, and selection of control mechanisms. Usually, relevant air extraction pipelines are connected to the air extraction holes of the engine, and air extraction valves are installed on the air extraction pipelines. By controlling the opening degree of the air extraction valve, the purpose of controlling the air extraction volume can be achieved, and the performance of the engine under different conditions and different air extraction volumes can be obtained.

[0003] At the present stage, the domestic development of aero-engines only designs special control mechanisms for the corresponding air extraction control requirements. Although this design meets the requirements of air extraction tests, it also causes the idle and waste of tooling. In addition, some existing test stands will select air extraction valves with a higher degree of integration, thereby simplifying the control system. Based on an example, the air extraction valve is selected as a pneumatic valve / electric valve, and the valve itself is equipped with relatively complex electrical devices. The control system only needs to send / receive general analog signals to control / receive the valve opening degree / feedback. Although the pneumatic / electric valve has less interface requirements for the control system, the valve response of the pneumatic / electric valve is worse than that of the hydraulic valve, so it cannot better reflect the air extraction performance of the engine. Based on another example, the air extraction valve is selected as a hydraulic valve. In order to simplify the equipment selection of the control system, it is necessary for the hydraulic valve manufacturer to integrate a proportional valve / an electro-hydraulic servo valve and various conditioned position feedbacks. The control system only needs to send / receive general analog signals to control / receive the valve opening degree / feedback, and the valve response is good. However, such a highly integrated hydraulic air extraction valve will bring a very large tooling transformation effort to the test stand, and due to the matching of the valve flow capacity, it may lead to that this complex valve can only be applied to this scenario and cannot be reused, resulting in a large amount of resource waste.

[0004] Therefore, in the existing valve control mechanism, the deficiencies are as follows: the integration requirement for the valve is relatively high, there is a lack of scenarios for valve reuse, and it is extremely easy to cause project delays due to deviations in the valve manufacturing stage; the input and output capabilities of the control system depend on the capabilities of the controller, and they are all conventional electrical signals, indirectly reducing the control ability of the control system.

[0005] Therefore, it is necessary to use a servo control mechanism that can not only ensure the response of the valve but also improve the reuse rate of the valve and the reuse rate of the control system. Summary of the Invention

[0006] The present disclosure is provided to introduce some concepts in a simplified form that will be further described in the following detailed description. The present disclosure is not intended to identify the key features or essential features of the claimed subject matter, nor is it intended to be used to help determine the scope of the claimed subject matter.

[0007] One of the objectives of the present disclosure is to provide a servo control mechanism. A valve island with multiple built-in electro-hydraulic servo valves is selected as the driving element, and a control system that matches different control signal output ranges can meet the actuation conditions of various simple hydraulic valves. A multi-channel hydraulic valve feedback signal conditioning device is designed inside the control system to minimize the integration degree of the valve, thereby reducing the processing difficulty of the valve, improving the reuse rate of the valve, and broadening the control ability of the control system.

[0008] According to one aspect of the present disclosure, a valve servo control mechanism is provided, including: a valve island, which includes a plurality of independent electro-hydraulic servo valves; a plurality of independent valves connected to the valve island; and a servo control device connected to the valve island and the plurality of valves. The servo control device includes: a controller output device, which includes a plurality of independent controller output modules for providing control signals to the valve island; a controller input device, which includes a plurality of independent controller input modules for receiving feedback signals from the valves used in the plurality of valves; a signal driving device, which includes a plurality of independent signal driving modules for adjusting the control signals from the controller output device to match the electro-hydraulic servo valves used in the valve island; a signal conditioning device, which includes a plurality of independent signal conditioning modules for adjusting the feedback signals from the valves used in the plurality of valves to match the controller input device; and an isolation device for isolating the signal driving device and the signal conditioning device from the valve island, the plurality of valves, the controller output device, and the controller input device.

[0009] In an embodiment of the present disclosure, each of the plurality of valves is provided with a position feedback sensor, and the plurality of valves are independent of each other.

[0010] In another embodiment of the present disclosure, the isolation device includes: a plurality of signal drive isolation modules that are independent of each other, where each signal drive isolation module is used to isolate the corresponding signal drive module in the signal drive device from the valve island, the plurality of valves, the controller output device, and the controller input device; and a plurality of signal conditioning isolation modules that are independent of each other, where each signal conditioning isolation module is used to isolate the corresponding signal conditioning module in the signal conditioning device from the valve island, the plurality of valves, the controller output device, and the controller input device.

[0011] In another embodiment of the present disclosure, each signal drive module includes a set of output sensitivity adjustment devices for adjusting the output sensitivity according to the drive signal range of each electro-hydraulic servo valve in the valve island; and each signal conditioning module includes a set of input sensitivity adjustment devices for adjusting the input sensitivity according to the working characteristics of the valves used, the accuracy acquisition requirements, and the capabilities of the controller input device.

[0012] In a further embodiment of the present disclosure, the valve servo control mechanism further includes: a memory for storing a plurality of configuration states of the valve servo control mechanism corresponding to each of the plurality of valves, where each configuration state includes the enabled state of the isolation device, the sensitivity of the signal conditioning device, and the sensitivity of the signal drive device.

[0013] On the other hand of the present disclosure, a valve servo control method is provided. The valve servo control method is applied to the valve servo control mechanism as described in the present disclosure. The valve servo control method includes: determining whether the output capability of the controller output module in the controller output device meets the drive requirements of the electro-hydraulic servo valve used in the valve island; determining whether to enable the corresponding signal drive module to adjust the control signal output by the corresponding controller output module based on whether the output capability of the controller output module meets the drive requirements of the electro-hydraulic servo valve used; determining whether the input capability of the controller input module in the controller input device meets the acquisition requirements of the position feedback sensor of the valve used; and determining whether to enable the corresponding signal conditioning module to adjust the feedback signal from the corresponding valve based on whether the input capability of the controller input module meets the acquisition requirements of the position feedback sensor of the valve used.

[0014] In an embodiment of the present disclosure, determining whether to enable a corresponding signal driving module to adjust the control signal output by a corresponding controller output module based on whether the output capability of the controller output module meets the driving requirements of the electro-hydraulic servo valve used further includes: when the output signal from the controller output module meets the driving requirements of the electro-hydraulic servo valve used, enabling the signal driving isolation module corresponding to the electro-hydraulic servo valve used in the isolation device and directly transmitting the output signal to the valve island; or when the output signal does not meet the driving requirements of the electro-hydraulic servo valve used, not enabling the signal driving isolation module corresponding to the electro-hydraulic servo valve used in the isolation device and adjusting the output signal through the signal driving module to match the electro-hydraulic servo valve used in the valve island.

[0015] In a further embodiment of the present disclosure, adjusting the output signal through the signal driving module to match the electro-hydraulic servo valve used in the valve island further includes: the signal driving module adjusts the output sensitivity level according to the driving signal range of the electro-hydraulic servo valve used to obtain an output signal that meets the requirements of the electro-hydraulic servo valve used, and transmits the obtained output signal to the valve island.

[0016] In another embodiment of the present disclosure, determining whether to enable a corresponding signal conditioning module to adjust the feedback signal from a corresponding valve based on whether the input capability of the controller input module meets the acquisition requirements of the position feedback sensor of the valve used further includes: when the input capability meets the acquisition requirements of the position feedback sensor of the valve used, enabling the signal conditioning isolation module corresponding to the valve used in the isolation device and directly transmitting the feedback signal from the valve used to the controller input device; or when the input capability does not meet the acquisition requirements of the position feedback sensor of the valve used, not enabling the signal conditioning isolation module corresponding to the valve used in the isolation device and adjusting the feedback signal from the valve used through the signal conditioning module to match the controller input device.

[0017] In a further embodiment of the present disclosure, adjusting the feedback signal from the valve used through the signal conditioning module to match the controller input device further includes: the signal conditioning module adjusts the input sensitivity level according to the actual working state of the valve used to obtain an input signal that meets the acquisition capability of the controller input device, and transmits the obtained input signal to the controller input device.

[0018] In another embodiment of the present disclosure, the valve servo control method further includes: storing a plurality of configuration conditions of the valve servo control mechanism corresponding to each of the plurality of valves, where each configuration condition includes the enabled state of the isolation device, the sensitivity of the signal conditioning device, and the sensitivity of the signal driving device; invoking, based on the first valve used, the first configuration condition corresponding to the first valve among the plurality of configuration conditions; and when detecting a switch from the first valve to a second valve among the plurality of valves, deactivating the first configuration condition and invoking the second configuration condition corresponding to the second valve among the plurality of configuration conditions.

[0019] These and other features and advantages will become apparent by reading the following detailed description and referring to the associated drawings. It should be understood that the foregoing general description and the following detailed description are illustrative only and do not limit the various aspects claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To understand in detail the manner in which the above-described features of the present disclosure are used, a more specific description of the above briefly summarized content may be made with reference to the various embodiments, some of which are shown in the drawings. It should be noted, however, that the drawings only show certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow other equally effective aspects.

[0021] Figure 1 A schematic diagram of a valve servo control mechanism according to an embodiment of the present invention is shown.

[0022] Figure 2 A flowchart of a valve servo control method according to an embodiment of the present invention is shown.

[0023] Figure 3 A schematic diagram of the configuration process of a valve servo control mechanism according to an embodiment of the present invention is shown.

[0024] Figure 4 A flowchart of valve replacement according to an embodiment of the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not used to limit the scope of protection of the present disclosure.

[0026] In the description of the present disclosure, it should be noted that unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. "Vertical" does not mean strictly vertical, but within the allowable error range. "Parallel" does not mean strictly parallel, but within the allowable error range.

[0027] The orientation terms appearing in the following description are all the directions shown in the figures and do not limit the specific structure of the present disclosure. In the description of the present disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0028] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present disclosure. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of the present disclosure, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0030] Figure 1 The schematic diagram of a valve servo control mechanism according to an embodiment of the present invention is shown. It can be appreciated that Figure 1 the schematic diagram of the valve servo control mechanism shown in Figure 1 is merely exemplary. As shown in Figure 1The electro-hydraulic servo valves 1, electro-hydraulic servo valves 2... electro-hydraulic servo valves n shown in []. In a non-limiting embodiment, the plurality of valves 104 may each be provided with a position feedback sensor and be independent of each other.

[0031] The servo control equipment 106 may include a controller output device 108, a controller input device 110, a signal driving device 112, a signal conditioning device 114, and an isolation device 116. Among them, the controller output device 108 may include a plurality of independent controller output modules (such as Figure 1 the controller output module 1, controller output module 2... controller output module n shown in []), and is used to provide control signals to the valve island 102.

[0032] The controller input device 110 may include a plurality of independent controller input modules (such as Figure 1 the controller input module 1, controller input module 2... controller input module n shown in []), and is used to receive feedback signals from the valves used in the plurality of valves 104 (such as Figure 1 the valve 1, valve 2... valve n shown in []).

[0033] The signal driving device 112 may include a plurality of independent signal driving modules (such as Figure 1 the signal driving module 1, signal driving module 2... signal driving module n shown in []), and is used to adjust the control signals from the controller output device 108 to match the electro-hydraulic servo valves used in the valve island 102. In a non-limiting embodiment, each signal driving module may include a set of output sensitivity adjusting devices for output sensitivity adjustment according to the driving signal range of each electro-hydraulic servo valve in the valve island 102.

[0034] The signal conditioning device 114 may include a plurality of independent signal conditioning modules (such as Figure 1 the signal conditioning module 1, signal conditioning module 2... signal conditioning module n shown in []), and is used to adjust the feedback signals from the valves used in the plurality of valves to match the controller input device. In a non-limiting embodiment, each signal conditioning module may include a set of input sensitivity adjusting devices for input sensitivity adjustment according to the working characteristics, precision acquisition requirements of the valves used, and the capabilities of the controller input device 110.

[0035] The isolation device 116 can be used to isolate the signal driving device 112 and the signal conditioning device 114 from the valve island 102, the plurality of valves 104, the controller output device 108, and the controller input device 106. In a non-limiting embodiment, the isolation device 116 can include a plurality of independent signal driving isolation modules and a plurality of independent signal conditioning isolation modules. Each signal driving isolation module can be used to isolate the corresponding signal driving module in the signal driving device 112 from the valve island 102, the plurality of valves 104, the controller output device 108, and the controller input device 106. Each signal conditioning isolation module can be used to isolate the corresponding signal conditioning module in the signal conditioning device 114 from the valve island 102, the plurality of valves 104, the controller output device 108, and the controller input device 106.

[0036] In a further non-limiting embodiment, the valve servo control mechanism can further include a memory (not shown). The memory can be used to store a plurality of configuration conditions of the valve servo control mechanism corresponding to each of the plurality of valves 104, where each configuration condition includes the enabled state of the isolation device 116, the sensitivity of the signal conditioning device 114, and the sensitivity of the signal driving device 112.

[0037] Figure 2 A flowchart of a valve servo control method according to an embodiment of the present invention is shown. As Figure 2 shown, in step 202, it can be determined whether the output capacity of the controller output module in the controller output device (such as Figure 1 the controller output device 108 in Figure 1 ) meets the driving requirements of the electro-hydraulic servo valve used in the valve island (such as

[0038] the valve island 102 in

[0039] ). Specifically, in the case where the output signal from the controller output module meets the driving requirements of the electro-hydraulic servo valve used, the signal driving isolation module corresponding to the electro-hydraulic servo valve used in the isolation device (such as Figure 1 the isolation device 116 in Figure 1 ) can be enabled to directly transmit the output signal to the valve island (such as Figure 1the signal driving isolation module corresponding to the electro-hydraulic servo valve used in the isolation device 116) adjusts the output signal through the signal driving module to match the electro-hydraulic servo valve used in the valve island (e.g., Figure 1 the electro-hydraulic servo valve used in the valve island 102) in

[0040] In a further non-limiting embodiment, the output signal can be further adjusted through the following operations by the signal driving module to match the electro-hydraulic servo valve used in the valve island (e.g., Figure 1 the electro-hydraulic servo valve used in the valve island 102) in: the signal driving module adjusts the output sensitivity gear according to the driving signal range of the electro-hydraulic servo valve used to obtain an output signal that meets the requirements of the electro-hydraulic servo valve used, and transmits the obtained output signal to the valve island.

[0041] In step 206, it can be determined whether the input capability of the controller input module in the controller input device (e.g., Figure 1 the controller input device 110) in Figure 1 meets the acquisition requirements of the position feedback sensors of the valves used in the multiple valves (e.g.,

[0042] the multiple valves 104) in.

[0043] Specifically, when the input capability meets the acquisition requirements of the position feedback sensors of the valves used, the signal conditioning isolation module corresponding to the valves used in the isolation device (e.g., Figure 1 the isolation device 116) in can be enabled to directly transmit the feedback signal from the valves used to the controller input device (e.g., Figure 1 the controller input device 110) in. Conversely, when the input capability does not meet the acquisition requirements of the position feedback sensors of the valves used, the signal conditioning isolation module corresponding to the valves used in the isolation device is not enabled, and the feedback signal from the valves used is adjusted through the signal conditioning module to match the controller input device.

[0044] In a further non-limiting embodiment, the feedback signal from the valves used can be further adjusted through the following operations by the signal conditioning module to match the controller input device: the signal conditioning module adjusts the input sensitivity gear according to the actual working state of the valves used to obtain an input signal that meets the acquisition capability of the controller input device, and transmits the obtained input signal to the controller input device (e.g., Figure 1 the controller input device 110) in.

[0045] The following, in conjunction with Figure 3 is used to explain the schematic diagram of the configuration process of the valve servo control mechanism according to an embodiment of the present invention. The configuration process of the valve servo control mechanism can be executed by Figure 1 the described valve servo control mechanism, and can adopt the Figure 2 described valve servo control method.

[0046] For example, the entire valve servo control mechanism can be composed of the isolation device 116, signal driving device 112, signal conditioning device 114, controller output device 108, and controller input device 110 shown in Figure 1 . The valve island 102, valve 104, and oil circuit part can be used as additional auxiliary mechanisms of the valve servo control mechanism so that the valve servo control mechanism can drive the valve 102 to actuate. Among them, the oil circuit part can be connected accordingly according to the characteristics of the valve island 102 and the valve 104. The valve island 102 mainly consists of a plurality of electro-hydraulic servo valves, and each servo valve is independent of each other. The valve 104 can be composed of a plurality of actuating mechanisms with position feedback sensors, and each valve is independent of each other. The isolation device 116 can be composed of a plurality of independent signal driving isolation modules and a plurality of signal conditioning isolation modules. The signal conditioning device 114 can be composed of a plurality of independent signal conditioning modules, and each signal conditioning module can further include a set of input sensitivity adjustment devices. The signal driving device can be composed of a plurality of independent signal driving modules, and each signal driving module can further include a set of output sensitivity adjustment devices. The controller input device 110 / controller output device 108 can be composed of a plurality of independent controller input modules / controller output modules.

[0047] For example, the controller input device 110 / controller output device 108 can respectively collect / output common analog signals, such as 4 - 20 mA, ±10 V, 0 - 10 V signals, etc. However, for the electro-hydraulic servo valves in the valve island 102, generally a relatively large output signal is required to drive them if no additional electric device module is installed, such as ±100 mA, ±310 mA, etc. In addition, if no additional electric device module is installed for the position feedback sensors installed on the valve 104, the signal is generally an LVDT signal, and the common controller input device 110 does not have the ability to collect it.

[0048] Therefore, when no additional electric device module is installed for the electro-hydraulic servo valves in the valve island 102 and the position feedback sensors of the valve 104, the overall integration of the valve is relatively low at this time. Based on a non-limiting example, the air bleed valve 104 is a hydraulic butterfly valve, the valve island 102 and the air bleed valve 104 are independent and embedded with multiple electro-hydraulic servo valves, the driving signal of the electro-hydraulic servo valve is ±310 mA, and the position feedback signal of the air bleed valve 104 is of the LVDT type. In this case, the signal driving device 112 and the signal conditioning device 114 are required.

[0049] In this embodiment, the position feedback signal is routed as Valve 104 - Isolation Device 116 - Signal Conditioning Device 114 - Controller Input Device 110. Among them, the signal conditioning device 114 can adjust the input sensitivity according to the working characteristics of the valve 104, the accuracy acquisition requirements, and the capabilities of the controller input device 110. For example, if the adjustment condition of Valve 1 among multiple valves 104 is relatively strict and higher requirements are imposed on the resolution and accuracy of the feedback signal, the input sensitivity adjustment gear can be switched to S2. At this time, the acquisition range of the controller input device 110 becomes wider, and the resolution and accuracy are improved. Conversely, for example, if the adjustment condition of Valve 2 is relatively loose, the input sensitivity adjustment gear can be switched to S1, and the acquisition range of the controller input becomes narrower. If other valves are replaced subsequently, there is no need to modify the electrical connection, and only the input sensitivity adjustment gear needs to be adjusted to match the actual application scenario.

[0050] On the other hand, in this embodiment, the drive signal of the electro-hydraulic servo valve in the valve island 102 is routed as Controller Output Device 108 - Signal Driving Device 112 - Isolation Device 116 - Valve Island 102. Among them, the signal driving device 112 can adjust the output sensitivity gear according to the drive signal range of each electro-hydraulic servo valve in the valve island 102, so as to achieve the purpose that the controller output device 108 can flexibly match different valve islands 102. For example, different types of electro-hydraulic servo valves are assembled in the valve island 102, each with a different drive signal valve 104. Among them, Valve 1 and Valve 2 use type A electro-hydraulic servo valves, while Valve 3 and Valve 4 use type B electro-hydraulic servo valves. During the preliminary debugging, the output sensitivity adjustment gears are adjusted to S1 and S2 respectively according to the actual application scenario. If any electro-hydraulic servo valve is replaced with another brand later, only the output sensitivity adjustment gear needs to be adjusted to achieve flexible matching of the control system without adding new equipment. The specific process can be referred to in the following Figure 3 .

[0051] In addition, the isolation device 116 can have the function of isolating the signal driving device 112 and the signal conditioning device 114 from the valve 104, the valve island 102, the controller input device 110 / controller output device 108.

[0052] The specific configuration process of the valve servo control mechanism is as Figure 3As shown, it starts from step 302. At step 304, it is judged whether the output ability of the controller output device 108 meets the requirements of the electro-hydraulic servo valve n used. When the output ability meets the requirements of the electro-hydraulic servo valve n used, proceed to step 306, enable the corresponding signal drive isolation module n in the isolation device 116, and directly provide the output signal to the electro-hydraulic servo valve n; on the contrary, when the output ability does not meet the requirements of the electro-hydraulic servo valve n used, proceed to step 308, do not enable the isolation device 116, and adjust the corresponding signal drive module n in the signal drive device 112 according to the requirements of the electro-hydraulic servo valve n, so that its output sensitivity reaches Sn (i.e., matches the electro-hydraulic servo valve n), and then provide the adjusted signal to the electro-hydraulic servo valve n.

[0053] At step 310, it is judged whether the input ability of the controller input device 110 meets the acquisition requirements of the position feedback sensor of the valve n. When the input ability meets the acquisition requirements of the position feedback sensor of the valve n, proceed to step 312, enable the corresponding signal conditioning isolation module n in the isolation device 116, and directly provide the input signal to the position feedback sensor of the valve n; on the contrary, when the input ability does not meet the acquisition requirements of the position feedback sensor of the valve n, proceed to step 314, do not enable the isolation device 116, and adjust the corresponding signal conditioning module n in the signal conditioning device 114 according to the sensor requirements of the valve n, so that its input sensitivity reaches Sn (i.e., matches the valve n), and then transmit the adjusted signal to the host computer system.

[0054] At step 316, the host computer inputs an instruction to display the feedback signal. Specifically, the control instruction is transmitted to the electro-hydraulic servo valve n used, and the valve feedback signal is transmitted to the host computer in real time to form the servo loop control of the valve n. Then, the process ends at step 318.

[0055] For example, when valve 1 and electro-hydraulic servo valve 1 are replaced with a valve product with a higher integration level, the valve product body already includes some electro-control modules and can directly output / receive signals from the controller input device 110 / controller output device 108. Therefore, at this time, the signal drive isolation module 1 and signal conditioning isolation module 1 in the isolation device 116 can be enabled separately, that is, only the signal drive isolation module 1 and signal conditioning isolation module 1 are isolated and do not work, and the remaining signal drive isolation modules and signal conditioning isolation modules still work normally. Thus, the entire valve servo control mechanism can flexibly match valves with different integration levels and the replacement of valve / valve island equipment, greatly improving the reuse rate of the valve servo control mechanism, without the need for separate design, procurement, installation, and debugging for a single valve, reducing the requirements for valve integration level, and broadening the signal input and output capabilities on the premise of ensuring accuracy.

[0056] Figure 4The figure shows a valve replacement flow chart according to an embodiment of the present invention. Correspondingly, the valve servo control method in this embodiment may further include: storing multiple configuration statuses of the valve servo control mechanism corresponding to each of the multiple valves 104, where each configuration status includes the enabled state of the isolation device 116, the sensitivity of the signal conditioning device 114, and the sensitivity of the signal driving device 112. Then, based on the first valve used, the first configuration status corresponding to the first valve among the multiple configuration statuses is called. When it is detected that the switch is made from the first valve to the second valve among the multiple valves 104, the first configuration status is deactivated, and the second configuration status corresponding to the second valve among the multiple configuration statuses is called.

[0057] For example, the process of replacing valve 1 with valve n may start from step 402. At step 404, the enabled state of the isolation device 116 of valve 1, the sensitivity level of the signal driving device 112, and the sensitivity level of the signal conditioning device 114 among the multiple valves 104 may be recorded. At step 406, the enabled state of the isolation device 116 of valve n, the sensitivity level of the signal driving device 112, and the sensitivity level of the signal conditioning device 114 may be recorded. At step 408, the replacement of the installation positions of valve 1 and valve n is completed. At step 410, according to the various configuration statuses corresponding to valve n recorded at step 406, the configuration replacement of the control mechanisms of valve 1 and valve n is completed. At step 412, the host computer inputs an instruction to display the feedback signal. Then, the process ends at step 414.

[0058] The above describes the valve servo control mechanism and method of the present invention. On the one hand, the valve servo control mechanism adopts a multi-channel signal conditioning device, which can condition the LVDT signal output by the hydraulic valve into the voltage and current signals required by the control system as needed, and can adjust different sensitivities according to the actual working state of the valve. On the other hand, the valve servo control mechanism adopts a multi-channel signal driving device, which can broaden the range of the output signal of the control system, and can adapt to different controller output devices according to the control accuracy, and then adapt to different types of valve islands, which can not only ensure the control output accuracy but also achieve a wide range of control output capabilities, and improve the adaptation ability to different electro-hydraulic servo valves. On the other hand, the valve servo control mechanism designs an isolation device, which can directly connect the signal output by the hydraulic valve to the control signal acquisition card of the controller input device, so as to broaden the valve feedback sensors that the control mechanism can match, and can isolate the control signal output from the controller output device from the signal driving device based on user self-configuration and directly connect it to the corresponding electrical interface of the valve island, improving the adaptation ability to different electro-hydraulic servo valves.

[0059] Compared with the solutions in the prior art, the present invention has at least the following advantages:

[0060] (1) Reduce the valve integration level, enhance the competitiveness of domestic small and medium-sized valve enterprises in special application fields, get rid of the dependence on foreign high-integration valve manufacturers, and improve the reuse rate of valves.

[0061] (2) Broaden the signal output ability of the control system, which can adapt to different types of electro-hydraulic servo valves while ensuring control accuracy, and reduce the difficulty of selecting electro-hydraulic servo valves.

[0062] (3) Broaden the valve feedback acquisition ability of the control system, which can be compatible with hydraulic valves directly outputting LVDT signals, pneumatic / electric valves equipped with complex electrical devices, and can adjust the signal sensitivity according to the working state of the valve to improve the signal acquisition accuracy.

[0063] The above-described content includes examples of various aspects of the claimed subject matter. Of course, it is not possible to describe every conceivable combination of components or methods for the purpose of depicting the claimed subject matter, but those of ordinary skill in the art should recognize that many further combinations and permutations of the claimed subject matter are possible. Thus, the disclosed subject matter is intended to cover all such alterations, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. A valve servo control mechanism, characterized in that, comprising: A valve island, the valve island includes a plurality of independent electro-hydraulic servo valves; A plurality of independent valves connected to the valve island; and A servo control device connected to the valve island and the plurality of valves, the servo control device includes: A controller output device, the controller output device includes a plurality of independent controller output modules for providing control signals to the valve island; A controller input device, the controller input device includes a plurality of independent controller input modules for receiving feedback signals from the valves used in the plurality of valves; A signal driving device, the signal driving device includes a plurality of independent signal driving modules for adjusting the control signals from the controller output device to match the electro-hydraulic servo valves used in the valve island; A signal conditioning device, the signal conditioning device includes a plurality of independent signal conditioning modules for adjusting the feedback signals from the valves used in the plurality of valves to match the controller input device; and An isolation device for isolating the signal driving device and the signal conditioning device from the valve island, the plurality of valves, the controller output device and the controller input device.

2. The valve servo control mechanism according to claim 1, characterized in that, Each of the plurality of valves is provided with a position feedback sensor, and the plurality of valves are independent of each other.

3. The valve servo control mechanism according to claim 1, characterized in that, The isolation device includes: A plurality of independent signal driving isolation modules, each of which is used to isolate the corresponding signal driving module in the signal driving device from the valve island, the plurality of valves, the controller output device and the controller input device; and A plurality of independent signal conditioning isolation modules, each of which is used to isolate the corresponding signal conditioning module in the signal conditioning device from the valve island, the plurality of valves, the controller output device and the controller input device.

4. The valve servo control mechanism according to claim 1, characterized in that, Each signal driving module includes a set of output sensitivity adjustment devices for adjusting the output sensitivity according to the driving signal range of each electro-hydraulic servo valve in the valve island; and Each signal conditioning module includes a set of input sensitivity adjustment devices for adjusting the input sensitivity according to the working characteristics of the valves used, the accuracy acquisition requirements, and the capabilities of the controller input device.

5. The valve servo control mechanism according to claim 4, characterized in that, The valve servo control mechanism further includes: A memory for storing a plurality of configuration states of the valve servo control mechanism corresponding to each of the plurality of valves, each configuration state including the enabled state of the litigation isolation device, the sensitivity of the signal conditioning device, and the sensitivity of the signal driving device.

6. A valve servo control method, characterized in that, The valve servo control method is applied to the valve servo control mechanism as described in any one of claims 1-5. The valve servo control method includes: Determining whether the output capacity of the controller output module in the controller output device meets the driving requirements of the electro-hydraulic servo valve used in the valve island; Based on whether the output capacity of the controller output module meets the driving requirements of the electro-hydraulic servo valve used, determining whether to enable the corresponding signal driving module to adjust the control signal output by the corresponding controller output module; Determining whether the input capacity of the controller input module in the controller input device meets the acquisition requirements of the position feedback sensor of the valve used; and Based on whether the input capacity of the controller input module meets the acquisition requirements of the position feedback sensor of the valve used, determining whether to enable the corresponding signal conditioning module to adjust the feedback signal from the corresponding valve.

7. The valve servo control method according to claim 6, wherein, Based on whether the output capacity of the controller output module meets the driving requirements of the electro-hydraulic servo valve used, determining whether to enable the corresponding signal driving module to adjust the control signal output by the corresponding controller output module further includes: When the output signal from the controller output module meets the driving requirements of the electro-hydraulic servo valve used, enabling the signal driving isolation module corresponding to the electro-hydraulic servo valve used in the isolation device and directly transmitting the output signal to the valve island, or When the output signal does not meet the driving requirements of the electro-hydraulic servo valve used, not enabling the signal driving isolation module corresponding to the electro-hydraulic servo valve used in the isolation device, and adjusting the output signal through the signal driving module to match the electro-hydraulic servo valve used in the valve island.

8. The valve servo control method according to claim 7, wherein, Adjusting the output signal through the signal driving module to match the electro-hydraulic servo valve used in the valve island further includes: The signal driving module adjusts the output sensitivity level according to the driving signal range of the electro-hydraulic servo valve used to obtain an output signal that meets the requirements of the electro-hydraulic servo valve used, and transmits the obtained output signal to the valve island.

9. The valve servo control method according to claim 6, wherein, Based on whether the input capacity of the controller input module meets the acquisition requirements of the position feedback sensor of the valve used, determining whether to enable the corresponding signal conditioning module to adjust the feedback signal from the corresponding valve further includes: When the input capacity meets the acquisition requirements of the position feedback sensor of the valve used, enabling the signal conditioning isolation module corresponding to the valve used in the isolation device and directly transmitting the feedback signal from the valve used to the controller input device, or When the acquisition requirements of the position feedback sensor of the valve in use are not met by the input capability, the signal conditioning isolation module corresponding to the valve in use in the isolation device is not enabled, and the feedback signal from the valve in use is adjusted by the signal conditioning module to match the controller input device.

10. The valve servo control method according to claim 9, wherein, adjusting the feedback signal from the valve in use by the signal conditioning module to match the controller input device further includes: the signal conditioning module adjusts the input sensitivity level according to the actual working state of the valve in use to obtain an input signal that meets the acquisition capability of the controller input device, and transmits the obtained input signal to the controller input device.

11. The valve servo control method according to claim 6, wherein, the valve servo control method further includes: storing a plurality of configuration conditions of the valve servo control mechanism corresponding to each of the plurality of valves, wherein each configuration condition includes the enabled state of the isolation device, the sensitivity of the signal conditioning device, and the sensitivity of the signal driving device; invoking a first configuration condition among the plurality of configuration conditions corresponding to the first valve based on the first valve in use; and when it is detected that the switch is made from the first valve to a second valve among the plurality of valves, deactivating the first configuration condition and invoking a second configuration condition among the plurality of configuration conditions corresponding to the second valve.

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