Drive Circuit and Vibration Damping System

Abstract

The present application relates to a drive circuit and a vibration damping system. The drive circuit includes a plurality of drive branches. The input ends of the plurality of drive branches respectively receive control signals, the output ends of the plurality of drive branches are respectively connected to a plurality of target devices for outputting force, and the plurality of drive branches include at least one first drive branch. Wherein, the first drive branch is configured to: when the received control signal meets a first preset condition, control the corresponding target device to be in a first force output state, and when the received control signal meets a second preset condition, control the corresponding target device to be in a second force output state; the force output by the target device in the first force output state is less than the force output by it in the second force output state, thereby realizing the independent control of the force output of a single motor by the drive circuit, so that the drive circuit can simultaneously adapt to the control scenarios of large-range force output and high-precision force output, improving the control performance of the drive circuit and broadening the product application scenarios.

Description

Technical Field

[0001] This application relates to the technical field of motor drive control, and particularly relates to a drive circuit and a vibration damping system. Background Art

[0002] With the continuous improvement of the precision of ultra-precision machining equipment and measuring instruments, the requirements for the vibration of their working environment tend to be micro-amplitude and low-frequency, thus posing more stringent requirements for the vibration damping performance of vibration damping tables. Traditional passive vibration isolation technology consists of a mass-spring-damper. Due to the inherent contradiction between its low-frequency vibration transmission rate and high-frequency vibration attenuation rate, it cannot meet the vibration damping requirements of ultra-precision equipment. Therefore, there is an urgent need for some new technologies and new methods to improve this situation.

[0003] Active vibration damping is an important technology to solve the above problems. An active vibration damping system usually uses motor drive, piezoelectric drive, hydraulic drive, and / or pneumatic drive to provide a force opposite to the ground vibration and table vibration, so as to achieve its active vibration damping function.

[0004] However, the above active vibration damping system has the problem of being difficult to balance large-range force output and high-precision force output, which limits its application scenarios. Summary of the Invention

[0005] The purpose of this application is to provide a drive circuit and a vibration damping system to solve the problem that the active vibration damping system is difficult to balance large-range force output and high-precision force output, so as to expand its application scenarios.

[0006] An embodiment of this application provides a drive circuit, which includes a plurality of drive branches. The input ends of the plurality of drive branches respectively receive control signals, and the output ends of the plurality of drive branches are respectively connected to a plurality of target devices for outputting force, and the plurality of drive branches include at least one first drive branch; wherein, the first drive branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in the first force output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in the second force output state; and, the force output by the target device corresponding to the first drive branch in the first force output state is less than the force output by it in the second force output state.

[0007] Wherein, the plurality of drive branches further include at least one second drive branch; wherein, the second drive branch is configured to: in response to receiving a control signal, control the corresponding target device to be in the third force output state; and, the force output by the target device corresponding to the second drive branch in the third force output state is greater than the force output by the target device corresponding to the first drive branch in the second force output state.

[0008] Among them, when the first driving branch controls the corresponding target device to be in the first output state, it specifically performs: controlling the corresponding target device to stop outputting force, so as to control the corresponding target device to be in the first output state.

[0009] Among them, the first driving branch includes a signal conversion circuit and a first driver. The signal conversion circuit receives a control signal and is connected to the first driver, and the first driver is connected to the corresponding target device. Moreover, the signal conversion circuit is configured to: when the received control signal meets the first preset condition, attenuate the control signal by the first attenuation method to obtain a first attenuated control signal, and transmit the first attenuated control signal to the first driver; when the received control signal meets the second preset condition, attenuate the control signal by the second attenuation method to obtain a second attenuated control signal, and transmit the second attenuated control signal to the first driver. The first driver is configured to: in response to receiving the first attenuated control signal, control its corresponding target device to be in the first output state, and the magnitude of the force output by its corresponding target device in the first output state is in direct proportion to the signal strength of the first attenuated control signal; in response to receiving the second attenuated control signal, control its corresponding target device to be in the second output state, and the magnitude of the force output by its corresponding target device in the second output state is in direct proportion to the signal strength of the second attenuated control signal.

[0010] Among them, the control signal is a control voltage signal. The signal conversion circuit is specifically configured to: when the received control voltage signal is greater than the preset negative voltage and less than the preset positive voltage, convert the control voltage signal into a zero voltage, and use the zero voltage as the first attenuated control signal to be transmitted to the first driver; when the received control voltage signal is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, attenuate the control voltage signal by a preset attenuation amount to obtain a second attenuated control signal, and transmit the second attenuated control signal to the first driver. The first driver is specifically configured to: in response to receiving the zero voltage, control the corresponding target device to stop outputting force, so as to control the corresponding target device to be in the first output state, and in response to receiving the second attenuated control signal, control the corresponding target device to output force according to the second attenuated control signal, so as to control the corresponding target device to be in the second output state.

[0011] Among them, when the signal conversion circuit executes that when the received control voltage signal is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, it attenuates the control voltage signal by a preset attenuation amount to obtain a second attenuated control signal and transmits the second attenuated control signal to the first driver, it specifically executes: when the received control voltage signal is less than or equal to the preset negative voltage, subtract the preset negative voltage from the control voltage signal to obtain a second attenuated control signal and transmit the second attenuated control signal to the first driver; when the received control voltage signal is greater than or equal to the preset positive voltage, subtract the preset positive voltage from the control voltage signal to obtain a second attenuated control signal and transmit the second attenuated control signal to the first driver.

[0012] Among them, the signal conversion circuit includes a first arithmetic unit, a first comparator, a first analog switch, a second arithmetic unit, a second comparator, a second analog switch, and a third arithmetic unit. Among them, the first arithmetic unit and the first comparator are both connected to the first analog switch, the second arithmetic unit and the second comparator are both connected to the second analog switch, the first analog switch and the second analog switch are both connected to the third arithmetic unit, and the third arithmetic unit is connected to the first driver; among them, the first arithmetic unit receives a control voltage signal and a preset positive voltage respectively, and is configured to: subtract the preset positive voltage from the control voltage signal and then transmit it to the first input end of the first analog switch; the first comparator receives the control voltage signal and the preset positive voltage respectively, and is configured to: when the control voltage signal is greater than the preset positive voltage, send a first conduction signal to the first analog switch, and when the control voltage signal is not greater than the preset positive voltage, send a first turn-off signal to the first analog switch; the first analog switch is configured to: in response to receiving the first conduction signal, control the conduction between the first input end and the output end of the first analog switch to realize transmitting the control voltage signal after subtracting the preset positive voltage to the input end of the third arithmetic unit, and in response to receiving the first turn-off signal, control the turn-off between the first input end and the output end of the first analog switch; the second arithmetic unit receives the control voltage signal and a preset negative voltage respectively, and is configured to: subtract the preset negative voltage from the control voltage signal and then transmit it to the first input end of the second analog switch; the second comparator receives the control voltage signal and the preset negative voltage respectively, and is configured to: when the control voltage signal is less than the preset negative voltage, send a second conduction signal to the second analog switch, and when the control voltage signal is not less than the preset negative voltage, send a second turn-off signal to the second analog switch; the second analog switch is configured to: in response to receiving the second conduction signal, control the conduction between the first input end and the output end of the second analog switch to realize transmitting the control voltage signal after subtracting the preset negative voltage to the input end of the third arithmetic unit, and in response to receiving the second turn-off signal, control the turn-off between the first input end and the output end of the second analog switch; the third arithmetic unit is configured to: add the voltage signals on its input end and then transmit them to the first driver.

[0013] Among them, the signal conversion circuit further includes a controllable switch, the control end of the controllable switch is connected to the output end of the first comparator, the controllable switch is connected to the first analog switch, and the controllable switch is configured to send a first conduction signal to the first analog switch when it is turned on, and is configured to send a first turn-off signal to the first analog switch when it is turned off; and, the first comparator is specifically configured to: when the control voltage signal is greater than the preset positive voltage, control the controllable switch to turn on to realize sending a first conduction signal to the first analog switch; when the control voltage signal is not greater than the preset positive voltage, control the controllable switch to turn off to realize sending a first turn-off signal to the first analog switch.

[0014] Among them, the signal conversion circuit further includes a first buffer, a second buffer, and a third buffer. The first buffer is connected between the first analog switch and the third arithmetic unit, the second buffer is connected between the second analog switch and the third arithmetic unit, and the third buffer is connected between the third arithmetic unit and the first driver.

[0015] An embodiment of the present application further provides a vibration damping system, which includes the drive circuit of any one of the above.

[0016] The beneficial effects of the present application are as follows: The drive circuit and the vibration damping system provided by the present application. The drive circuit can be applied to the vibration damping system and includes multiple drive branches. The input ends of the multiple drive branches respectively receive control signals, and the output ends of the multiple drive branches are respectively connected to multiple target devices for outputting force correspondingly, and the multiple drive branches include at least one first drive branch; among them, the first drive branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in the first force output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in the second force output state; and, the force output by the target device corresponding to the first drive branch in the first force output state is less than the force output by it in the second force output state. Thus, in the process of controlling the drive circuit to drive the target device (such as a motor) to output a desired magnitude of force through the control signal, the drive circuit can independently control the force output of a single target device, so that the drive circuit can simultaneously adapt to the control scenarios of large-range force output and high-precision force output, improve the control performance of the drive circuit, broaden the application scenarios of the product, and improve the applicability of the product. Description of the Drawings

[0017] The following will make the technical solutions and other beneficial effects of the present application obvious by describing the specific embodiments of the present application in detail in conjunction with the drawings.

[0018] Figure 1 is a schematic structural diagram of a drive circuit provided by the related art;

[0019] Figure 2 is a schematic diagram of the relationship between the overall force output by all target devices driven by the drive circuit in the related art and the control signal;

[0020] Figure 3 is a schematic structural diagram of a drive circuit provided by an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of the signal intensity comparison before and after the attenuation of the control signal provided by an embodiment of the present application;

[0022] Figure 5It is a schematic diagram of the relationship between the overall output force of all target devices driven by the drive circuit provided in the embodiment of the present application and the control signal;

[0023] Figure 6 It is another schematic diagram of the drive circuit provided in the embodiment of the present application;

[0024] Figure 7 It is another schematic diagram of the drive circuit provided in the embodiment of the present application;

[0025] Figure 8 It is another schematic diagram of the drive circuit provided in the embodiment of the present application. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0028] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0030] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure of this application, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit this application. In addition, this application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0031] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a driving circuit provided by the related art. As Figure 1 shown, the driving circuit in the related art includes multiple drivers (for example, driver A and driver B). The multiple drivers respectively receive a control signal VIN, and each driver in the multiple drivers is correspondingly connected to a target device. For example, driver A and driver B are respectively correspondingly connected to target device A and target device B. And each driver is configured to, in response to receiving the control signal VIN, drive its corresponding target device to output a force according to the control signal VIN, and the magnitude of the overall force F output by all the target devices driven by the driving circuit is linearly proportional to the signal strength of the control signal VIN (as Figure 2 shown).

[0032] However, each driver included in the driving circuit in the related art receives the control signal VIN synchronously, and synchronously drives its corresponding target device to output a force, and the forces output by the respective target devices are the same. This makes the driving circuit in the related art only able to control the overall output force of all the target devices, but unable to independently control the output force of a single target device. Therefore, the driving circuit in the related art cannot simultaneously adapt to control scenarios with a large range of output forces and high-precision output forces, limiting its application scenarios.

[0033] In view of the above problems, an embodiment of the present application provides a drive circuit and a vibration damping system. The drive circuit can be applied to the vibration damping system and includes a plurality of drive branches. The input ends of the plurality of drive branches respectively receive control signals, the output ends of the plurality of drive branches are respectively connected to a plurality of target devices for outputting force, and the plurality of drive branches include at least one first drive branch. Wherein, the first drive branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in the first force output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in the second force output state; and, the force output by the target device corresponding to the first drive branch in the first force output state is less than the force output by it in the second force output state. Thus, in the process of controlling the drive circuit to drive the target device (such as a motor) to output a desired magnitude of force through the control signal, the drive circuit can independently control the force output of a single target device, so that the drive circuit can simultaneously adapt to control scenarios of large-range force output and high-precision force output, improve the control performance of the drive circuit, broaden the application scenarios of the product, and improve the applicability of the product.

[0034] The following will be described in detail with specific embodiments. It should be noted that the serial numbers of the following embodiments do not limit the preferred order of the embodiments.

[0035] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of the drive circuit provided by an embodiment of the present application. As Figure 3 shown, the drive circuit 10 includes a plurality of drive branches 100 / 200. The input ends of the plurality of drive branches 100 / 200 respectively receive a control signal VIN, and the output ends of the plurality of drive branches 100 / 200 are respectively connected to a plurality of target devices 20A / 20B for outputting force. Specifically, each drive branch 100 / 200 can be connected to a corresponding target device 20A / 20B, different drive branches 100 / 200 can be connected to different target devices 20A / 20B, and each drive branch 100 / 200 is configured to drive its corresponding target device 20A / 20B to output force. Wherein, the target devices 20A / 20B can specifically be motors (such as linear motors) or other devices with the same or similar functions.

[0036] Specifically, the multiple drive branches 100 / 200 may include at least one first drive branch 100. The first drive branch 100 is connected to its corresponding target device 20A, and the first drive branch 100 is configured to: when the received control signal VIN satisfies a first preset condition, control its corresponding target device 20A to be in a first output state, and when the received control signal VIN satisfies a second preset condition, control its corresponding target device 20A to be in a second output state. Moreover, the force output by the target device 20A corresponding to the first drive branch 100 in the first output state is less than the force output by it in the second output state.

[0037] Among them, the control signal VIN is used to control the overall output force of all target devices 20A / 20B driven by the drive circuit 10. Specifically, when the control signal VIN satisfies the first preset condition, the control signal VIN can achieve controlling the overall output force within a first range, and when the control signal VIN satisfies the second preset condition, the control signal VIN can achieve controlling the overall output force within a second range, and the second range is different from the first range.

[0038] In this way, in the case where the multiple drive branches 100 / 200 synchronously receive the same control signal VIN, by configuring the first drive branch 100 among the multiple drive branches 100 / 200 to automatically switch the output state of its corresponding target device 20A according to the actual situation of the control signal VIN, so as to achieve outputting different magnitudes of force, thus realizing the independent control of the output force of the target device 20A corresponding to the first drive branch 100 by the drive circuit 10, improving the control performance of the drive circuit 10, and enabling the drive circuit 10 to simultaneously adapt to control scenarios with a large range of output force and high-precision output force, broadening the application scenarios.

[0039] In the above drive circuit 10, the number of the first drive branches 100 may be less than or equal to the total number of the drive branches 100 / 200. That is, all of the multiple drive branches 100 / 200 may be the first drive branches 100, or only some of them may be the first drive branches 100.

[0040] In some embodiments, such as Figure 3As shown, only some of the multiple drive branches 100 / 200 described above can be the first drive branch 100. Specifically, the multiple drive branches 100 / 200 can further include at least one second drive branch 200. The second drive branch 200 is connected to its corresponding target device 20B, and the second drive branch 200 can be configured to: in response to receiving the control signal VIN, control its corresponding target device 20B to be in a third output state. Moreover, the force output by the target device 20B corresponding to the second drive branch 200 in the third output state can be greater than the force output by the target device 20A corresponding to the first drive branch 100 in the second output state.

[0041] Specifically, the second drive branch 200 can be specifically configured to: in response to receiving the control signal VIN, control its corresponding target device 20B to be in the third output state according to the control signal VIN. Moreover, the magnitude of the force output by the target device 20B corresponding to the second drive branch 200 in the third output state can be in a proportional relationship with the signal strength of the control signal VIN. For example, it can specifically be in a linear proportional relationship. In this way, the second drive branch 200 including the second driver 201 can be provided by the drive branches including driver A or driver B in the existing drive circuit (such as Figure 1 shown), so that the above drive circuit 10 in the embodiment of the present application can be obtained by transforming some drive branches in the existing drive circuit into the first drive branch, which is beneficial to reducing the product cost.

[0042] In some embodiments, as Figure 3 shown, only some of the multiple drive branches 100 / 200 described above can be the first drive branch 100. Moreover, when the first drive branch 100 controls its corresponding target device 20A to be in the first output state, it can specifically perform: controlling its corresponding target device 20A to stop outputting force, so as to control its corresponding target device 20A to be in the first output state. In this way, it is realized that the target device 20A corresponding to the first drive branch 100 outputs force only when the control signal VIN meets the second preset condition, rather than outputting force when the control signal VIN meets the first preset condition. Therefore, the output accuracy of all the target devices 20A / 20B driven by the drive circuit 10 can be improved when the overall output force is small.

[0043] In some embodiments, as Figure 3 shown, the first drive branch 100 can include a signal conversion circuit 101 and a first driver 102. Among them, the signal conversion circuit 101 receives the control signal VIN, and the signal conversion circuit 101 is connected to the first driver 102, and the first driver 102 is connected to its corresponding target device 20A.

[0044] Moreover, the signal conversion circuit 101 can be configured to:

[0045] When the received control signal VIN meets the first preset condition, attenuate the control signal VIN by the first attenuation method to obtain the first attenuated control signal VOUT1, and transmit the first attenuated control signal VOUT1 to the first driver 102;

[0046] When the received control signal VIN meets the second preset condition, attenuate the control signal VIN by the second attenuation method to obtain the second attenuated control signal VOUT2, and transmit the second attenuated control signal VOUT2 to the first driver 102.

[0047] Correspondingly, the first driver 102 can be configured to:

[0048] In response to receiving the first attenuated control signal VOUT1, control its corresponding target device 20A to be in the first output state;

[0049] In response to receiving the second attenuated control signal VOUT2, control its corresponding target device 20A to be in the second output state.

[0050] Specifically, the above-mentioned attenuation of the control signal VIN by the first attenuation method can be: attenuating the signal strength of the control signal VIN to zero; or, it can be: attenuating the signal strength of the control signal VIN by a first ratio. The above-mentioned attenuation of the control signal VIN by the second attenuation method can be: attenuating the signal strength of the control signal VIN by a second ratio, where the second ratio can be less than the first ratio; or, it can be: attenuating the signal strength of the control signal VIN by a preset attenuation amount.

[0051] Specifically, the magnitude of the force output by the target device 20A corresponding to the first driver 102 in the first output state can be in a proportional relationship with the signal strength of the first attenuated control signal VOUT1. For example, it can specifically be in a linear proportional relationship. The magnitude of the force output by the target device 20A corresponding to the first driver 102 in the second output state can be in a proportional relationship with the signal strength of the second attenuated control signal VOUT2. For example, it can specifically be in a linear proportional relationship.

[0052] Thus, by integrating the signal conversion circuit 101 into the first driving branch 100 and using the signal conversion circuit 101 to attenuate the received control signal VIN and then transmit it to the first driver 102, not only can the driving circuit 10 reduce the force output by the target device 20A corresponding to the first driving branch 100 when the control signal VIN meets the first preset condition, but also the driving circuit 10 can reduce the force output by the target device 20A corresponding to the first driving branch 100 when the control signal VIN meets the second preset condition. Therefore, not only can the output force accuracy of all the target devices 20A / 20B driven by the driving circuit 10 be improved when the overall output force is small, but also the output force accuracy of all the target devices 20A / 20B driven by the driving circuit 10 can be improved when the overall output force is large.

[0053] In some specific embodiments, as Figure 3 shown, the above control signal VIN can specifically be a control voltage signal VIN. And when the control voltage signal VIN is greater than the preset negative voltage and less than the preset positive voltage, it can be considered that the control voltage signal VIN meets the above first preset condition; when the control voltage signal VIN is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, it can be considered that the control voltage signal VIN meets the above second preset condition. Among them, the control voltage signal VIN can be between the preset low voltage and the preset high voltage. The preset low voltage and the above preset negative voltage are both less than the zero voltage (i.e., 0V), and the preset low voltage is less than the above preset negative voltage. The preset high voltage and the above preset positive voltage are both greater than the zero voltage, and the preset high voltage is greater than the above preset positive voltage. Specifically, the preset high voltage can be equal to the absolute value of the preset low voltage, and the preset positive voltage can be equal to the absolute value of the preset negative voltage. Exemplarily, the preset high voltage and the preset low voltage can be 10V and -10V respectively, and the preset positive voltage and the preset negative voltage can be aV and -aV respectively, where a is greater than zero and less than 10, and the specific value of a can be set according to the user's requirement for the output force accuracy when the product outputs a small force. For example, a can be equal to 1.

[0054] And, during specific implementation, the above signal conversion circuit 101 can specifically be configured as:

[0055] When the received control voltage signal VIN is greater than the preset negative voltage and less than the preset positive voltage, convert the control voltage signal VIN into a zero voltage, and use the zero voltage as the first attenuated control signal VOUT1 to transmit to the first driver 102;

[0056] When the received control voltage signal VIN is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, attenuate the control voltage signal VIN by a preset attenuation amount to obtain a second attenuated control signal VOUT2, and transmit the second attenuated control signal VOUT2 to the first driver 102.

[0057] Correspondingly, the above-mentioned first driver 102 can be specifically configured as:

[0058] In response to receiving a zero voltage, control its corresponding target device 20A to stop outputting force, so as to control its corresponding target device 20A to be in the first output state;

[0059] In response to receiving the second attenuated control signal VOUT2, control its corresponding target device 20A to output force according to the second attenuated control signal VOUT2, so as to control its corresponding target device 20A to be in the second output state.

[0060] Specifically, the above-mentioned preset attenuation amount is greater than zero and can be less than or equal to the absolute value of the above-mentioned preset negative voltage and / or the above-mentioned preset positive voltage. And in specific implementation, the specific value of the above-mentioned preset attenuation amount can be set according to the user's requirement for the output accuracy when the product outputs a large force. The magnitude of the force output by the target device 20A corresponding to the above-mentioned first driver 102 in the second output state can be in a proportional relationship with the signal strength of the second attenuated control signal VOUT2. For example, it can specifically be in a linear proportional relationship.

[0061] In this way, not only is it realized that when the control voltage signal VIN is greater than the preset negative voltage and less than the preset positive voltage, the driving circuit 10 controls the target device 20A corresponding to the first driving branch 100 to stop outputting force, but also it is realized that when the control voltage signal VIN is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, the driving circuit 10 reduces the force output by the target device 20A corresponding to the first driving branch 100. Therefore, not only can the output accuracy of all the target devices 20A / 20B driven by the driving circuit 10 be improved when the overall output is a relatively small force, but also the output accuracy of all the target devices 20A / 20B driven by the driving circuit 10 can be improved when the overall output is a relatively large force.

[0062] In some embodiments, when the signal conversion circuit 101 executes that when the received control voltage signal VIN is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, attenuate the control voltage signal VIN by a preset attenuation amount to obtain a second attenuated control signal VOUT2, and transmit the second attenuated control signal VOUT2 to the first driver 102, it can specifically execute:

[0063] When the received control voltage signal VIN is less than or equal to a preset negative voltage, subtract the preset negative voltage from the control voltage signal VIN to obtain a second attenuated control signal VOUT2, and transmit the second attenuated control signal VOUT2 to the first driver 102;

[0064] When the received control voltage signal VIN is greater than or equal to a preset positive voltage, subtract the preset positive voltage from the control voltage signal VIN to obtain a second attenuated control signal VOUT2, and transmit the second attenuated control signal VOUT2 to the first driver 102.

[0065] In this way, as Figure 4 shown, it is achieved that: when the control voltage signal VIN is less than or equal to the preset negative voltage V2, the control voltage signal VIN is transformed into a second attenuated control signal VOUT2 equal to the difference between the control voltage signal VIN and the preset negative voltage; when the control voltage signal VIN is greater than or equal to the preset positive voltage V1, the control voltage signal VIN is transformed into a second attenuated control signal VOUT2 equal to the difference between the control voltage signal VIN and the preset positive voltage; when the control voltage signal VIN is greater than the preset negative voltage V2 and less than the preset positive voltage V1, the control voltage signal VIN is transformed into a first attenuated control signal VOUT1 equal to zero voltage. Therefore, it can ensure the signal continuity of the control voltage signal VIN after attenuation.

[0066] Moreover, by configuring the signal after attenuating the control voltage signal VIN as a Figure 4 continuous signal as shown, it can further achieve the continuity of the overall output force F of all target devices 20A / 20B driven by the drive circuit 10 (as Figure 5 shown), so as to avoid a cliff-like increase or decrease in the overall output force F of all these target devices 20A / 20B when the control voltage signal VIN is equal to or close to the preset positive voltage V1, and to avoid a cliff-like increase or decrease in the overall output force F of all these target devices 20A / 20B when the control voltage signal VIN is equal to or close to the preset negative voltage V2. Thus, the control performance of the above drive circuit 10 can be further improved, and when it is applied to a vibration damping system, the vibration damping performance and stability of the vibration damping system can be improved.

[0067] In some specific embodiments, as Figure 6As shown, the signal conversion circuit 101 may include a first arithmetic unit 1011, a first comparator 1012, a first analog switch 1013, a second arithmetic unit 1014, a second comparator 1015, a second analog switch 1016, and a third arithmetic unit 1017. Among them, the first arithmetic unit 1011 and the first comparator 1012 are both connected to the first analog switch 1013. The second arithmetic unit 1014 and the second comparator 1015 are both connected to the second analog switch 1016. The first analog switch 1013 and the second analog switch 1016 are both connected to the third arithmetic unit 1017. The third arithmetic unit 1017 is connected to the first driver 102.

[0068] Specifically, the first arithmetic unit 1011 may receive a control voltage signal VIN and a preset positive voltage V1 respectively, and may be configured to: subtract the preset positive voltage V1 from the control voltage signal VIN and then transmit the result to the first input terminal a of the first analog switch 1013. In this way, the voltage on the first input terminal a of the first analog switch 1013 is equal to the difference obtained by subtracting the preset positive voltage V1 from the control voltage signal VIN, denoted as voltage (VIN - V1).

[0069] The first comparator 1012 may receive a control voltage signal VIN and a preset positive voltage V1 respectively, and may be configured to: when the control voltage signal VIN is greater than the preset positive voltage V1, send a first conduction signal to the first analog switch 1013; when the control voltage signal VIN is not greater than the preset positive voltage V1, send a first turn-off signal to the first analog switch 1013. Among them, the first conduction signal may be a high potential, and the first turn-off signal may be a low potential.

[0070] The first analog switch 1013 may be configured to: in response to receiving the first conduction signal, control the conduction between the first input terminal a of the first analog switch 1013 and the output terminal c of the first analog switch 1013, so as to transmit the voltage (VIN - V1) on the first input terminal a of the first analog switch 1013 to the first input terminal of the third arithmetic unit 1017; in response to receiving the first turn-off signal, control the turn-off between the first input terminal a of the first analog switch 1013 and the output terminal c of the first analog switch 1013.

[0071] In this way, when the control voltage signal VIN is greater than the preset positive voltage V1, the voltage on the input terminal of the third arithmetic unit 1017 is the voltage (VIN - V1), and at the same time, when the control voltage signal VIN is not greater than the preset positive voltage V1, it is avoided that the voltage (VIN - V1) is transmitted to the input terminal of the third arithmetic unit 1017.

[0072] Specifically, the second arithmetic unit 1014 can receive the control voltage signal VIN and the preset negative voltage V2 respectively, and can be configured to: transmit the control voltage signal VIN minus the preset negative voltage V2 to the first input terminal a of the second analog switch 1016. In this way, the voltage on the first input terminal a of the second analog switch 1016 is equal to the difference obtained by subtracting the preset negative voltage V2 from the control voltage signal VIN, denoted as the voltage (VIN - V2).

[0073] The second comparator 1015 can receive the control voltage signal VIN and the preset negative voltage V2 respectively, and can be configured to: when the control voltage signal VIN is less than the preset negative voltage V2, send a second conduction signal to the second analog switch 1016; when the control voltage signal VIN is not less than the preset negative voltage V2, send a second turn-off signal to the second analog switch 1016. Among them, the second conduction signal can be a high potential, and the second turn-off signal can be a low potential.

[0074] The second analog switch 1016 can be configured to: in response to receiving the second conduction signal, control the conduction between the first input terminal a of the second analog switch 1016 and the output terminal c of the second analog switch 1016, so as to realize the transmission of the voltage (VIN - V2) on the first input terminal a of the second analog switch 1016 to the second input terminal of the third arithmetic unit 1017; in response to receiving the second turn-off signal, control the turn-off between the first input terminal a of the second analog switch 1016 and the output terminal c of the second analog switch 1016.

[0075] In this way, when the control voltage signal VIN is less than the preset negative voltage V2, the voltage on the second input terminal of the third arithmetic unit 1017 is the voltage (VIN - V2), and at the same time, when the control voltage signal VIN is not less than the preset negative voltage V2, it is avoided that the voltage (VIN - V2) is transmitted to the input terminal of the third arithmetic unit 1017.

[0076] Specifically, the third arithmetic unit 1017 can be configured to: add the voltage signals on its input terminals and then transmit them to the first driver 102. Exemplarily, the third arithmetic unit 1017 can have two input terminals, and one of the two input terminals is connected to the output terminal c of the first analog switch 1013 and the output terminal c of the second analog switch 1016, for receiving the above voltage (VIN - V1) and the above voltage (VIN - V2), and the other of the two input terminals receives a zero voltage.

[0077] In this way, it is achieved that: when the control voltage signal VIN is greater than the preset positive voltage V1, the voltage output by the signal conversion circuit 101 to the first driver 102 is equal to the sum of the voltage (VIN - V1) and the zero voltage, that is, equal to the voltage (VIN - V1); when the control voltage signal VIN is less than or equal to the preset positive voltage V1 and greater than or equal to the preset negative voltage V2, the voltage output by the signal conversion circuit 101 to the first driver 102 is equal to the zero voltage; when the control voltage signal VIN is less than the preset negative voltage V2, the voltage output by the signal conversion circuit 101 to the first driver 102 is equal to the sum of the voltage (VIN - V2) and the zero voltage, that is, equal to the voltage (VIN - V2).

[0078] Specifically, as Figure 7 shown, the above-mentioned signal conversion circuit 101 may further include a controllable switch KA. The control end of the controllable switch KA is connected to the output end of the first comparator 1012. The controllable switch KA is connected to the first analog switch 1013. Exemplarily, the controllable switch KA may specifically be a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET). Moreover, the controllable switch KA may be configured to send a first conduction signal to the first analog switch 1013 when it is turned on, and may be configured to send a first turn-off signal to the first analog switch 1013 when it is turned off. Correspondingly, the first comparator 1012 may specifically be configured to: when the control voltage signal VIN is greater than the preset positive voltage V1, control the controllable switch V1 to conduct to send a first conduction signal to the first analog switch 1013; when the control voltage signal VIN is not greater than the preset positive voltage V1, control the controllable switch KA to turn off to send a first turn-off signal to the first analog switch 1013. In this way, it is possible to avoid the first analog switch 1013 and the second analog switch 1016 from conducting simultaneously, so as to improve the stability and reliability of the drive circuit 10.

[0079] Specifically, as Figure 6As shown, the above-mentioned signal conversion circuit 101 may further include a first buffer 1018, a second buffer 1019, and a third buffer 1010. Among them, the first buffer 1018 is connected between the first analog switch 1013 and the third arithmetic unit 1017, and can enhance the signal power of the voltage signal transmitted between the first analog switch 1013 and the third arithmetic unit 1017. The second buffer 1019 is connected between the second analog switch 1016 and the third arithmetic unit 1017, and can enhance the signal power of the voltage signal transmitted between the second analog switch 1016 and the third arithmetic unit 1017. The third buffer 1010 is connected between the third arithmetic unit 1017 and the first driver 102, and can enhance the signal power of the voltage signal transmitted between the third arithmetic unit 1017 and the first driver 102. In this way, it is beneficial to improve the stability and reliability of the drive circuit 10.

[0080] And, in specific implementation, as Figure 8 shown, the above-mentioned preset positive voltage V1 may be equal to the reference voltage VREF, and the absolute value of the above-mentioned preset negative voltage V2 may be equal to the reference voltage VREF. Specifically, the above-mentioned first arithmetic unit 1011 may be specifically a subtractor U6A, and for the specific structure of the subtractor U6A and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The first comparator 1012 may be specifically a comparator U6B, and for the specific structure of the comparator U6B and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The first analog switch 1013 may be specifically an analog switch U12, and for the specific structure of the analog switch U12 and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The second arithmetic unit 1014 may be specifically an adder U7B, and for the specific structure of the adder U7B and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The second comparator 1015 may be specifically a comparator U7C, and the reference voltage VREF is transmitted to the second comparator 1015 after being inverted by the voltage inverter U7A. Among them, for the specific structure of the comparator U7C and its connection relationship with other devices, please refer to Figure 8 , and for the specific structure of the voltage inverter U7A and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The second analog switch 1016 may be specifically an analog switch U11, and for the specific structure of the analog switch U11 and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The third arithmetic unit 1017 may be specifically an adder U9A, and for the specific structure of the adder U9A and its connection relationship with other devices, please refer to Figure 8, which will not be elaborated here. The controllable switch KA can specifically be the switching transistor Q1, and for the specific structure of the switching transistor Q1 and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The first buffer 1018 can specifically be the buffer U8A, and for the specific structure of the buffer U8A and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The second buffer 1019 can specifically be the buffer U8B, and for the specific structure of the buffer U8B and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here. The third buffer 1010 can specifically be the buffer U9B, and for the specific structure of the buffer U9B and its connection relationship with other devices, please refer to Figure 8 , which will not be elaborated here.

[0081] As can be seen from the above, the drive circuit provided in this embodiment includes multiple drive branches. The input ends of the multiple drive branches respectively receive control signals, the output ends of the multiple drive branches are respectively connected to multiple target devices for outputting force, and the multiple drive branches include at least one first drive branch; wherein, the first drive branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in the first force output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in the second force output state; and, the force output by the target device corresponding to the first drive branch in the first force output state is less than the force output by it in the second force output state. Thus, in the process of controlling the drive circuit to drive the target device (such as a motor) to output a desired magnitude of force through the control signal, it is possible to achieve independent control of the force output of a single target device by the drive circuit, so that the drive circuit can simultaneously adapt to control scenarios with a wide range of force output and high-precision force output, improve the control performance of the drive circuit, broaden the application scenarios of the product, and improve the applicability of the product.

[0082] The embodiment of the present application further provides a vibration damping system, which includes the drive circuit of any one of the above embodiments and multiple target devices for outputting force (such as motors), wherein the drive circuit is used to drive the multiple target devices to output force to achieve the active vibration damping function of the vibration damping system.

[0083] Specifically, the drive circuit includes a plurality of drive branches. The input ends of the plurality of drive branches respectively receive control signals. The output ends of the plurality of drive branches are respectively connected to the corresponding plurality of target devices for outputting force, and the plurality of drive branches include at least one first drive branch. Among them, the first drive branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in the first force output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in the second force output state. Moreover, the force output by the target device corresponding to the first drive branch in the first force output state is less than the force output by it in the second force output state.

[0084] In some embodiments, the above-mentioned vibration damping system may further include a bottom plate and a top plate arranged at a relatively spaced interval, and the above-mentioned drive circuit and target devices may be arranged between the bottom plate and the top plate. Specifically, the above-mentioned vibration damping system may further include a load, and the load may be fixed above the top plate, so as to achieve vibration damping of the load.

[0085] In some specific embodiments, the above-mentioned vibration damping system may further include a spring vibration damping component and a sensor component arranged between the bottom plate and the top plate. One end (i.e., the top end) of the spring vibration damping component is fixed to the top plate, and the other end (i.e., the bottom end) of the spring vibration damping component is fixed to the bottom plate. The sensor component is fixed to the top plate and is used to detect the movement of the top plate.

[0086] Specifically, the above-mentioned vibration damping system may further include a controller. The controller can generate a control signal according to the detection result of the sensor component and send the control signal to the input ends of each drive branch in the above-mentioned drive circuit.

[0087] It should be noted that for the vibration damping system provided by the embodiments of the present application, due to the provision of the drive circuit provided by the embodiments of the present application, therefore, the beneficial effects that can be achieved by any of the drive circuits provided by the embodiments of the present application can be realized. For details, see the previous embodiments and will not be elaborated here.

[0088] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A driving circuit, characterized in that: Applied in a vibration reduction system, the vibration reduction system comprises a load and a plurality of target devices for outputting force, the driving circuit is used to drive the plurality of target devices for outputting force to output force, so as to achieve vibration reduction of the load; The driving circuit includes a plurality of driving branches, the input ends of the plurality of driving branches respectively receive control signals, the output ends of the plurality of driving branches are respectively connected to the plurality of target devices for outputting force in the vibration reduction system, and the plurality of driving branches include at least one first driving branch and at least one second driving branch; Wherein, the first driving branch is configured to: when the received control signal meets the first preset condition, control the corresponding target device to be in the first output state, and when the received control signal meets the second preset condition, control the corresponding target device to be in the second output state; Furthermore, the force output by the target device corresponding to the first driving branch in the first output state is smaller than the force output by the target device in the second output state; The second driving branch is configured to: in response to receiving the control signal, control the corresponding target device to be in a third output state; Furthermore, the force output by the target device corresponding to the second driving branch in the third output state is greater than the force output by the target device corresponding to the first driving branch in the second output state; The control signal is used to control the overall output size of all target devices driven by the drive circuit; and when the control signal satisfies the first preset condition, the overall output size of all target devices driven by the drive circuit is within a first range; when the control signal satisfies the second preset condition, the overall output size of all target devices driven by the drive circuit is within a second range, and the size of the first range is smaller than the size of the second range.

2. The driving circuit according to claim 1, characterized in that: When the first driving branch controls the corresponding target device to be in the first output state, the first driving branch specifically performs: The corresponding target device is controlled to stop outputting force, so as to control the corresponding target device to be in the first output state.

3. The driving circuit according to claim 1, characterized in that: The first driving branch includes a signal conversion circuit and a first driver, wherein the signal conversion circuit receives the control signal and is connected to the first driver, and the first driver is connected to the corresponding target device; Furthermore, the signal conversion circuit is configured to: when the received control signal meets the first preset condition, attenuate the control signal in a first attenuation manner to obtain a first attenuated control signal, and transmit the first attenuated control signal to the first driver; when the received control signal meets the second preset condition, attenuate the control signal in a second attenuation manner to obtain a second attenuated control signal, and transmit the second attenuated control signal to the first driver; The first driver is configured to: in response to receiving a first attenuated control signal, control the corresponding target device to be in the first output state, and the magnitude of the force output by the corresponding target device in the first output state is directly proportional to the signal strength of the first attenuated control signal; in response to receiving a second attenuated control signal, control the corresponding target device to be in the second output state, and the magnitude of the force output by the corresponding target device in the second output state is directly proportional to the signal strength of the second attenuated control signal.

4. The driving circuit according to claim 3, characterized in that: The control signal is a control voltage signal; The signal conversion circuit is specifically configured as follows: When the received control voltage signal is greater than a preset negative voltage and less than a preset positive voltage, the control voltage signal is converted into a zero voltage, and the zero voltage is transmitted to the first driver as a first attenuated control signal; When the received control voltage signal is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, the control voltage signal is attenuated by a preset attenuation amount to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver; The first driver is specifically configured to: in response to receiving the zero voltage, control the corresponding target device to stop outputting force so as to control the corresponding target device to be in the first output state; and in response to receiving the second attenuated control signal, control the corresponding target device to output force according to the second attenuated control signal so as to control the corresponding target device to be in the second output state.

5. The driving circuit according to claim 4, characterized in that: When the signal conversion circuit performs the following steps when the received control voltage signal is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, the control voltage signal is attenuated by a preset attenuation amount to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver: When the received control voltage signal is less than or equal to the preset negative voltage, subtracting the preset negative voltage from the control voltage signal to obtain a second attenuated control signal, and transmitting the second attenuated control signal to the first driver; When the received control voltage signal is greater than or equal to the preset positive voltage, the preset positive voltage is subtracted from the control voltage signal to obtain a second attenuated control signal, and the second attenuated control signal is transmitted to the first driver.

6. The driving circuit according to claim 4, characterized in that: The signal conversion circuit includes a first operator, a first comparator, a first analog switch, a second operator, a second comparator, a second analog switch and a third operator, wherein the first operator and the first comparator are both connected to the first analog switch, the second operator and the second comparator are both connected to the second analog switch, the first analog switch and the second analog switch are both connected to the third operator, and the third operator is connected to the first driver; The first operator receives the control voltage signal and the preset positive voltage respectively, and is configured to: subtract the preset positive voltage from the control voltage signal and transmit the result to the first input terminal of the first analog switch; The first comparator receives the control voltage signal and the preset positive voltage respectively, and is configured to: send a first turn-on signal to the first analog switch when the control voltage signal is greater than the preset positive voltage, and send a first turn-off signal to the first analog switch when the control voltage signal is not greater than the preset positive voltage; The first analog switch is configured to: in response to receiving the first conduction signal, control the first input terminal of the first analog switch to be conductive with the output terminal of the first analog switch, so as to transmit the control voltage signal after the preset positive voltage is subtracted to the input terminal of the third operator, and in response to receiving the first shutdown signal, control the first input terminal of the first analog switch to be disconnected from the output terminal of the first analog switch; The second operator receives the control voltage signal and the preset negative voltage respectively, and is configured to: subtract the preset negative voltage from the control voltage signal and transmit the result to the first input terminal of the second analog switch; The second comparator receives the control voltage signal and the preset negative voltage respectively, and is configured to: send a second on signal to the second analog switch when the control voltage signal is less than the preset negative voltage, and send a second off signal to the second analog switch when the control voltage signal is not less than the preset negative voltage; The second analog switch is configured to: in response to receiving the second conduction signal, control the first input terminal of the second analog switch to be connected with the output terminal of the second analog switch, so as to transmit the control voltage signal after the preset negative voltage is subtracted to the input terminal of the third operator, and in response to receiving the second shutdown signal, control the first input terminal of the second analog switch to be disconnected from the output terminal of the second analog switch; The third operator is configured to add the voltage signals on its input terminals and transmit the sum to the first driver.

7. The driving circuit according to claim 6, characterized in that: The signal conversion circuit further includes a controllable switch, a control end of the controllable switch is connected to the output end of the first comparator, the controllable switch is connected to the first analog switch, and the controllable switch is configured to send the first on signal to the first analog switch when it is turned on, and is configured to send the first off signal to the first analog switch when it is turned off; Furthermore, the first comparator is specifically configured to: when the control voltage signal is greater than the preset positive voltage, control the controllable switch to be turned on so as to send the first turn-on signal to the first analog switch; when the control voltage signal is not greater than the preset positive voltage, control the controllable switch to be turned off so as to send the first turn-off signal to the first analog switch.

8. The driving circuit according to claim 6, characterized in that: The signal conversion circuit also includes a first buffer, a second buffer and a third buffer, wherein the first buffer is connected between the first analog switch and the third operator, the second buffer is connected between the second analog switch and the third operator, and the third buffer is connected between the third operator and the first driver.

9. A vibration reduction system, characterized in that: The driving circuit comprises the driving circuit according to any one of claims 1 to 8.

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