Adaptive electromagnetic vibration isolator and control method

Abstract

This invention discloses an adaptive electromagnetic vibration isolator, comprising an electromagnetic actuator, a sensor for acquiring actual vibration data, and a main control board that issues control commands to the electromagnetic actuator based on the vibration data. The main control board includes a data processing unit, a serial communication unit, a register latch unit, and a current control unit. This invention also provides a control method. The adaptive electromagnetic vibration isolator provided by this invention can adaptively change the magnitude and direction of the internal circuit current, and simultaneously introduces a serial communication strategy to achieve intelligent vibration control of electromechanical equipment.

Description

Technical Field

[0001] This invention belongs to the field of vibration and noise control technology for electromechanical equipment, and particularly relates to an adaptive electromagnetic vibration isolator and its control method. Background Technology

[0002] In the fields of electromechanical equipment and engineering technology, numerous active vibration control devices or actuators, including adaptive electromagnetic vibration isolators, have been developed to control structural or system vibration. Adaptive electromagnetic vibration isolators need to adaptively adjust the magnitude and direction of the current flowing through them according to the magnitude of the excitation force, generating an electromagnetic force that is in the same direction and similar in magnitude as the excitation force to counteract the excitation force and suppress vibration.

[0003] Most current adjustment modules on the market are manually adjusted by rotating a potentiometer, which cannot meet the needs of embedded systems for automatic real-time current adjustment. The few modules that can automatically adjust the current cannot switch the direction of the current at any time.

[0004] Patent document CN116044953A discloses a vibration isolation system, method, device, and electronic device. The vibration isolation system includes a working platform, a vibration damper, a mounting platform, and a sealing device. The vibration damper is mounted above the mounting platform, and the working platform is above the vibration damper. The sealing device is used to fix and seal the vibration damper. The vibration damper has N upper magnets near the mounting platform surface, and the mounting platform has N lower magnets opposite to the N upper magnets near the vibration damper surface. The corresponding upper and lower magnets are connected by springs. A first coil is surrounded on the surface of each of the N upper magnets, and each first coil is connected to a current controller. And / or a second coil is surrounded on the surface of each of the N lower magnets, and each second coil is connected to a current controller. Multiple magnets are used in conjunction with an electromagnet to dampen vibration. This device dampens vibration through magnets and permanent magnets, but the current magnitude can only be manually adjusted, and adaptive adjustment is not possible.

[0005] Patent document CN115899162A discloses a device for suppressing vibration of a vibration source. This device includes a spring vibration isolation unit, an electromagnetic force generating unit, and a positioning unit. The spring vibration isolation unit includes a base, a spring, and a load platform arranged from bottom to top. The electromagnetic force generating unit includes a support plate mounted on the spring for supporting the load platform, a magnetic attractor mounted on the support plate for attracting the load platform, a vibration sensor fixed to the load platform to sense vibration signals, a vibration analysis module that receives the vibration signals to analyze the movement direction and dynamic load information of the load platform, and a current control module that magnetizes the magnetic attractor based on the movement direction and dynamic load information of the load platform. The positioning unit is used to restrict the movement of the load platform within a certain range. This device proposes adjusting the spring vibration isolation unit based on vibration information to achieve vibration damping. However, the specification only provides adjustment of the output current based on the current control module, but does not explain how to perform the adjustment or how to achieve adaptive adjustment. Summary of the Invention

[0006] The purpose of this invention is to provide an adaptive electromagnetic vibration isolator and a control method. The vibration isolator can adaptively change the magnitude and direction of the internal circuit current, and at the same time, a serial communication strategy is introduced to realize intelligent vibration control of electromechanical equipment.

[0007] To achieve the first objective of this invention, a technical solution is provided, including an electromagnetic actuator, a sensor for acquiring actual vibration data, and a main control board for issuing control commands to the electromagnetic actuator based on the vibration data. The main control board includes a data processing unit, a serial communication unit, a register latch unit, and a current control unit.

[0008] The data processing unit is used to receive preset theoretical vibration data or actual vibration data collected by sensors and generate corresponding current control signals.

[0009] The serial communication unit includes a pre-built resistance table and a resistance network branch table. The resistance table and the resistance network branch table are traversed according to the current control signal to generate corresponding control parameters.

[0010] The current control unit includes a resistor network consisting of multiple branches. It adjusts the current direction and magnitude of the corresponding branches according to the received control parameters to output the target current corresponding to the current control signal.

[0011] The register latch unit is used to temporarily latch the current control parameters to ensure stable output of the target current.

[0012] Specifically, the resistor network includes a resistor circuit consisting of multiple high-power resistors and load resistors connected in parallel, and a current direction switch arranged on each branch.

[0013] Specifically, the resistor circuit consists of ten high-power resistors and a load resistor connected in parallel, and at the same time, a maximum of three branches are conducting.

[0014] Specifically, each resistor circuit branch has a current direction switch at its input and output terminals. Each current direction switch includes a POMS transistor with a transistor at its G terminal. The S terminal of the POMS transistor is connected to the resistor circuit branch, and its D terminal is connected to the current loop.

[0015] Specifically, when the POMS transistor at one end of the resistor circuit acts as a switch, the POMS transistor at the other end is unidirectionally connected to the connected transistor. Conversely, the functions of the two POMS transistors are interchanged, thereby achieving current direction adjustment.

[0016] Specifically, the target current has a current range of 0 to ±3A.

[0017] Specifically, the serial communication unit adopts a serial-in, parallel-out communication method.

[0018] To achieve the second objective of this invention, a control method is provided for the aforementioned adaptive electromagnetic vibration isolator, comprising the following steps:

[0019] Input vibration data, which includes preset theoretical vibration data and real vibration data collected by sensors.

[0020] Based on the vibration data, a current control signal corresponding to the required current of the load is generated.

[0021] Based on the current control signal, a fast lookup table method is used to traverse the pre-constructed resistance table and resistance network branch table to obtain the resistance network branch number and the corresponding current direction parameter corresponding to the current magnitude.

[0022] While controlling and adjusting the current direction of the target branch in the resistor network through the control parameters, the conducting branch is selected to obtain the corresponding current magnitude.

[0023] Based on the magnitude and direction of the current obtained by adjusting each branch of the resistor network, the target current corresponding to the output current control signal is obtained.

[0024] The electromagnetic actuator operates based on the target current, thereby adaptively eliminating equipment vibration.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] (1) It realizes programmable intelligent current adjustment, eliminating the cumbersome method of adjusting the current by manually rotating the potentiometer.

[0027] (2) The present invention innovatively designs a programmable method to dynamically change the magnitude and direction of the current in real time. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the adaptive electromagnetic vibration isolator provided in this embodiment;

[0029] Figure 2 A schematic diagram of the main control board provided in this embodiment;

[0030] Figure 3 A schematic diagram of a single resistor circuit provided in this embodiment; Detailed Implementation

[0031] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to be construed as...

[0032] Limitations of the invention. In the accompanying drawings, the same units / elements are referred to by the same reference numerals. Unless otherwise stated, the terminology used herein (including technical terms) has its common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and should not be understood to have an idealized or overly formal meaning.

[0033] like Figure 1 As shown, an adaptive electromagnetic vibration isolator includes an electromagnetic actuator, a sensor for acquiring actual vibration data, and a main control board that issues control commands to the electromagnetic actuator based on the vibration data.

[0034] like Figure 2 As shown, the main control board includes a data processing unit, a serial communication unit, a register latch unit, and a current control unit.

[0035] The data processing unit is used to receive preset theoretical vibration data or actual vibration data collected by sensors and generate corresponding current control signals.

[0036] A serial communication unit includes a pre-built resistance table and a resistance network branch table. The resistance table and the resistance network branch table are traversed according to the current control signal to generate corresponding control parameters.

[0037] The register latch unit is used to temporarily latch the current control parameters to ensure stable output of the target current.

[0038] The current control unit includes a resistor network consisting of multiple branches. Based on the received control parameters, it adjusts the current direction and magnitude of the corresponding branches to output the target current corresponding to the current control signal.

[0039] More specifically, the serial communication unit has a resistance value table and a resistor network branch table. When the load or electromagnetic actuator needs a certain amount of current, it will obtain the corresponding resistance value and network branch through a fast table lookup method and send a control signal to the current control unit. After receiving the control signal, the current control unit will quickly parse it and execute the control command after parsing to control the current direction and current magnitude. The latch will then latch the current control command to ensure a stable and continuous current output.

[0040] Let's take resistor network branch 1 as an example for illustration, such as... Figure 3 As shown, when branch control signal 1_1 is high, Q2 turns on, thus pulling down the gate level of Q1. Vgs is greater than the turn-on voltage of the PMOS transistor, and Q1 turns on. However, when branch control signal 1_2 is low, Q4 is off, and Q3's Vgs does not meet the condition, so it does not turn on. However, due to the parasitic diode between the source and drain of Q3, current can flow from this parasitic diode into current loop 2. At this time, the current direction is from current loop 1 to current loop 2. When branch control signal 1_2 is high, Q4 turns on, thus pulling down the gate level of Q3. Vgs is greater than the turn-on voltage of the PMOS transistor, and Q3 turns on. However, when branch control signal 1_1 is low, Q2 is off, and Q1's Vgs does not meet the condition, so it does not turn on. However, due to the parasitic diode between the source and drain of Q1, current can flow from this parasitic diode into current loop 1. At this time, the current direction is from current loop 2 to current loop 1. The magnitude of the current is determined by the number and number of branches in the conducting resistor network.

[0041] This embodiment also provides a control method for the adaptive electromagnetic vibration isolator provided in the above embodiment, comprising the following steps:

[0042] Input vibration data, which includes preset theoretical vibration data and real vibration data collected by sensors;

[0043] Based on the vibration data, a current control signal corresponding to the required current of the load is generated.

[0044] Based on the current control signal, a fast lookup table method is used to traverse the pre-constructed resistance table and resistance network branch table to obtain the resistance network branch number and the corresponding current direction parameter corresponding to the current magnitude.

[0045] While controlling and adjusting the current direction of the target branch in the resistor network through the control parameters, the conducting branch is selected to obtain the corresponding current magnitude.

[0046] The target current is obtained by adjusting the magnitude and direction of the current in each branch of the resistor network to output the current control signal.

[0047] The electromagnetic actuator operates based on the target current, thereby adaptively eliminating equipment vibration.

[0048] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application. Clearly, those skilled in the art can make various alterations and variations to this application without departing from its spirit and scope. Thus, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An adaptive electromagnetic vibration isolator, comprising an electromagnetic actuator, a sensor for acquiring actual vibration data, and a main control board for issuing control commands to the electromagnetic actuator based on the vibration data, characterized in that, The main control board includes a data processing unit, a serial communication unit, a register latch unit, and a current control unit; The data processing unit is used to receive preset theoretical vibration data or actual vibration data collected by sensors and generate corresponding current control signals. The serial communication unit includes a pre-built resistor table and a resistor network branch table. The resistor table and the resistor network branch table are traversed according to the current control signal to generate corresponding control parameters. The resistor circuit is composed of ten high-power resistors and a load resistor connected in parallel, and at the same time, a maximum of three branches are turned on. Each resistor circuit branch has a current direction switch at its input and output terminals. Each current direction switch includes a POMS transistor with a transistor at its G terminal. The S terminal of the POMS transistor is connected to the resistor circuit branch, and its D terminal is connected to the current loop. When the POMS transistor at one end of the resistor circuit acts as a switch, the POMS transistor at the other end conducts unidirectionally with the connected transistor. Conversely, the functions of the two POMS transistors are interchanged, thereby achieving current direction adjustment. The current control unit includes a resistor network composed of multiple branches, which adjusts the current direction and current magnitude of the corresponding branches according to the received control parameters, so as to output the target current corresponding to the current control signal. The register latch unit is used to temporarily latch the current control parameters to ensure stable output of the target current.

2. The adaptive electromagnetic vibration isolator according to claim 1, characterized in that, The target current has a current range of 0 to ±3A.

3. The adaptive electromagnetic vibration isolator according to claim 1, characterized in that, The serial communication unit adopts a serial-in, parallel-out communication method.

4. A control method, characterized in that, The adaptive electromagnetic vibration isolator as described in any one of claims 1 to 3 comprises the following steps: Input vibration data, which includes preset theoretical vibration data and real vibration data collected by sensors; Based on the vibration data, a current control signal corresponding to the magnitude of the current required by the load is generated; Based on the current control signal, a fast lookup table method is used to traverse the pre-constructed resistance table and resistance network branch table to obtain the resistance network branch number and the corresponding current direction parameter corresponding to the current magnitude. While controlling and adjusting the current direction of the target branch in the resistor network through the control parameters, the conducting branch is selected to obtain the corresponding current magnitude. Based on the magnitude and direction of the current obtained by adjusting each branch of the resistor network, the target current corresponding to the output current control signal is obtained. The electromagnetic actuator operates based on the target current, thereby adaptively eliminating equipment vibration.

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