CN220933362U

CN220933362U - Multidimensional vibration controller

Info

Publication number: CN220933362U
Application number: CN202321092637.9U
Authority: CN
Inventors: 关越; 王璟南; 贺智国; 崔广智; 罗丹; 鲁勇
Original assignee: Beijing Institute of Structure and Environment Engineering
Current assignee: Beijing Institute of Structure and Environment Engineering
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2024-05-10
Anticipated expiration: 2033-05-09

Abstract

The utility model provides a multidimensional vibration controller, which is based on PXIExpress bus architecture and comprises an upper computer and a lower computer, wherein the lower computer comprises a PXIe bus chassis, an X86 controller, a plurality of AD signal acquisition boards and a plurality of DA signal output boards, the X86 controller is used for real-time calculation of a vibration control algorithm, time domain data storage and communication control of the PXIe bus, the AD signal acquisition boards and the DA signal output boards are used as peripheral boards of a PXIe system, and each peripheral board comprises a corresponding analog-digital/digital conversion circuit. The system can realize the functions of analog signal input and output, real-time control calculation, time domain data storage, data uploading and the like.

Description

Multidimensional vibration controller

Technical Field

The utility model belongs to the field of environmental tests and reliability tests, and particularly relates to a multidimensional vibration control device taking a hydraulic or electric vibration table and a vibration exciter as control objects and a control method thereof.

Background

The vibration environment test is an effective method for identifying the reliability of product hardware in a real use environment, and the technology can make environmental vibration tests which are difficult to realize under normal conditions or have high experimental cost to be repeatedly reproduced at low cost.

The vibration environment test can be classified into a single-dimensional vibration and a multi-dimensional vibration according to an excitation manner. However, with the increasing requirements for environmental testing, conventional single-axis single-excitation vibration systems have not been able to provide enough thrust or to meet specific motion requirements to more truly simulate the actual working environment, so that more multi-axis excitation vibration systems are used in the prior art to increase the vibration testing level.

In the multidimensional vibration controller, the controller has the capability of collecting and outputting multichannel signals, and an input signal is connected with a sensor to measure acceleration signals of the vibration table; the output control signal drives the vibrating table through the power amplifier, the controller is connected with the operation computer through a network, data are transmitted to the operation computer, and the operation computer displays and provides a user operation interface. The multidimensional vibration controller solves the problems of insufficient thrust and insufficient control freedom degree in the vibration test, more truly simulates the actual motion state of the product and provides repeatable vibration signals in a laboratory.

However, the existing multi-dimensional vibration controller has a plurality of problems such as weak signal acquisition and storage capability, no support for various types of signal input, and the like.

Disclosure of Invention

In order to solve the above problems, the present utility model provides a multidimensional vibration controller, which is based on PXIExpress bus architecture, and can realize functions of analog signal input and output, real-time control calculation, time domain data storage, data uploading, and the like.

In order to achieve the above objective, the present utility model provides a multidimensional vibration controller, which is based on PXIExpress bus architecture, and comprises an upper computer and a lower computer, wherein ethernet communication is adopted between the upper computer and the lower computer; the upper computer is embedded with operation software, the lower computer comprises a PXIe bus chassis, an X86 controller, a plurality of AD signal acquisition boards and a plurality of DA signal output boards, the X86 controller is used for real-time calculation of a vibration control algorithm, time domain data storage and communication control of the PXIe bus, the AD signal acquisition boards and the DA signal output boards are used as peripheral boards of the PXIe system, and each peripheral board comprises a corresponding analog-digital/digital-analog conversion circuit.

Preferably, the X86 controller is used for deploying a Linux-RT real-time operating system and adopting an OpenMP multi-core parallel computing framework.

Preferably, the lower computer completes data acquisition and control signal output through a plurality of AD signal acquisition boards and a plurality of DA signal output boards, and realizes closed-loop control of the controller.

Preferably, the AD signal acquisition board comprises an FPGA controller, an 8-channel synchronous A/D converter, a signal conditioning circuit, a DDR memory and a power supply system.

Still further, the FPGA controller supports pci express bus interfaces, the signal conditioning circuit is used for anti-aliasing filtering and signal switching, and the DDR memory is used for data buffering.

Still further, the power system converts the 12V power provided by the bus into 5V, + -15V and 24V voltage outputs.

Preferably, the DA signal output board comprises an 8-channel synchronous D/A converter, an analog anti-mirror filter circuit and an output protection circuit.

Further, the maximum sampling rate of the 8-channel DA converter of the DA signal output plate is 216Ksps, and the precision is 32 bits.

Preferably, the upper computer and the lower computer are interconnected through an industrial gigabit Ethernet, and the network protocol is realized by adopting a TCP/IP protocol.

Compared with the prior art, the utility model has the following beneficial effects:

1) The application adopts PXIExpress bus + LinuxRT real-time operation system architecture.

2) The application supports various signal inputs and can realize closed-loop control of multipath input and output.

3) The application has the capacity of collecting signals with large capacity and storing locally, and can be used for offline data processing and analysis after environmental test.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic diagram of a system architecture according to an embodiment of the present application.

Fig. 2 shows a schematic diagram of an acquisition board according to an embodiment of the application.

Detailed Description

The utility model will be further described with reference to the drawings and examples. It should be noted that the following descriptions of the concepts are only for making the content of the present utility model easier to understand, and do not represent a limitation on the protection scope of the present utility model.

Embodiment one: as shown in fig. 1, a multidimensional vibration controller is provided, which is based on PXIExpress bus architecture and comprises an upper computer and a lower computer, wherein the upper computer and the lower computer adopt ethernet communication; the upper computer is embedded with test personnel operation software, the lower computer comprises a PXIe bus chassis, an X86 controller, a plurality of AD signal acquisition boards and a plurality of DA signal output boards, the X86 controller is used for real-time calculation of a vibration control algorithm, time domain data storage and communication control of the PXIe bus, the AD signal acquisition boards and the DA signal output boards are used as peripheral boards of the PXIe system, and each peripheral board comprises a corresponding analog-digital/digital-analog conversion circuit.

Preferably, as shown in fig. 2, the AD signal acquisition board includes an FPGA controller, an 8-channel synchronous a/D converter, a signal conditioning circuit, a DDR memory, and a power supply system.

The working principle of the multidimensional vibration controller is as follows: the sensor of the vibration controller sends the current vibration information into an AD signal acquisition board, the information is converted into a digital signal in the AD signal acquisition board through an 8-channel synchronous A/D converter, the digital signal is transmitted to an x86 controller through a PXIe bus after being analyzed and processed, the x86 controller analyzes the data and compares the data with expected vibration to obtain vibration correction data, the correction data is transmitted to a DA signal output board through the PXIe bus, and the DA signal output board converts and conditions the signal and then sends the signal to a driving vibration table to vibrate, so that the closed-loop control of the system can be realized; the multidimensional vibration controller can realize the functions of analog signal input and output, real-time control calculation, time domain data storage, data uploading and the like, and all closed-loop control strategies of the control system are completed by a lower computer.

Meanwhile, the lower computer of the vibration controller is communicated with the upper computer through the gigabit Ethernet, and the vibration control field programmable and the real-time display of external vibration information on the operation computer are realized through software support.

While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.

Claims

1. The multidimensional vibration controller is based on PXIExpress bus architecture and is characterized by comprising an upper computer and a lower computer, wherein the upper computer and the lower computer adopt Ethernet communication; the upper computer is embedded with operation software, the lower computer comprises a PXIe bus chassis, an x86 controller, a plurality of AD signal acquisition boards and a plurality of DA signal output boards, the x86 controller is used for real-time calculation of vibration control, time domain data storage and communication control of the PXIe bus, the AD signal acquisition boards and the DA signal output boards are used as peripheral boards of the PXIe system, and each peripheral board comprises a corresponding analog-digital/digital-analog conversion circuit.

2. A multi-dimensional vibration controller as defined in claim 1, wherein: the x86 controller is provided with a Linux-RT real-time operating system, and an OpenMP multi-core parallel computing framework is adopted.

3. A multi-dimensional vibration controller as claimed in claim 1 or 2, wherein: the lower computer completes data acquisition and control signal output through a plurality of AD signal acquisition boards and a plurality of DA signal output boards, and realizes closed-loop control of the controller.

4. A multi-dimensional vibration controller as claimed in claim 1 or 2, wherein: the AD signal acquisition board comprises an FPGA controller, an 8-channel synchronous A/D converter, a signal conditioning circuit, a DDR memory and a power supply system.

5. A multi-dimensional vibration controller as defined in claim 4, wherein: the FPGA controller supports a PCI Express bus interface, the signal conditioning circuit is used for anti-aliasing filtering and signal switching, and the DDR memory is used for data buffering.

6. A multi-dimensional vibration controller as defined in claim 4, wherein: the power system converts the 12V power provided by the bus into 5V, ±15V and 24V voltage outputs.

7. A multi-dimensional vibration controller as defined in claim 3, wherein: the DA signal output board comprises an 8-channel synchronous D/A converter, an analog anti-mirror filter circuit and an output protection circuit.

8. A multi-dimensional vibration controller as defined in claim 1, wherein: the upper computer and the lower computer are interconnected through an industrial gigabit Ethernet, and the network protocol is realized by adopting a TCP/IP protocol.