CN103397174B - Device and method for eliminating stress by utilizing modal broadband vibration - Google Patents
Device and method for eliminating stress by utilizing modal broadband vibration Download PDFInfo
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Abstract
The invention relates to a device for eliminating stress by utilizing modal broadband vibration. The device comprises a vibration source part and a control circuit part, wherein the vibration source part is used for driving a workpiece to generate aging vibration, and the control circuit part is used for collecting working condition signals of a vibration source and driving the vibration source to vibrate; the vibration source comprises a linear motor, and the workpiece is driven to vibrate by an output shaft of the linear motor; and a control circuit comprises a position sensor module, a real-time driving controlling module and an integrated display processing module, wherein the position sensor module is used for collecting time-domain working condition signals of the vibration source, the real-time driving controlling module is used for receiving the time-domain working condition signals, implementing and finishing modal analysis and vibration data calculation, converting frequency-domain vibration data of corresponding calculation results into driving signals and outputting the driving signals to the control circuit of the linear motor of the vibration source, and the integrated display processing module is used for providing data communication ports and man-machine interaction interfaces among systems. According to the device for eliminating the stress by utilizing the modal broadband vibration, the processing effects of the vibration aging of middle and small sized workpieces are improved, and the application range of the vibration aging is expanded. The invention further relates to a corresponding control method.
Description
Technical field
The present invention relates to a kind of vibration device and method, particularly relate to a kind of vibration device for ageing treatment and method.
Background technology
Vibration stress relief treatment is a kind of method eliminating its internal residual internal stress that engineering materials is commonly used, it is the Workpiece vibration utilizing mechanical means to make hardware, under resonant condition, circulation dynamic stress is imposed to workpiece, when making the vector of the internal stress of inside workpiece remnants and additional vibratory stress reach more than material yield strength, make material that the viscous deformation of trace occur, thus the internal stress of material internal is relaxed or redistributes and reach the object of dimensional stabilizing.Compared with thermal life, oscillating aging has less investment, instant effect, working cost is low and be conducive to the advantages such as environmental protection.
Current vibration ageing device is all adopt the vibrator with eccentric stiffener, makes vibrator and workpiece resonance, to reach oscillating aging.Vibrator is made up of eccentric case and high-speed electric expreess locomotive.In oscillating aging process, together with vibrator must rigidly fix with workpiece, can not have and at all loosen, otherwise vibration is invalid, does not have timeliness effect.At present, for large-scale workpiece, only vibrator need be rigidly fixed in the correct position of workpiece, but then vibrator and workpiece cannot be fixed together for small workpiece at all.Chinese patent CN201470586U discloses a kind of vibration ageing device, comprise platform, vibrator is fixed on flat edge of table, treat that the workpiece of ageing treatment is rigidly fixed on platform, vibrator and small workpiece are fixed on platform by this device, using platform as carrier, achieve the resonance of vibrator and small workpiece, solve because vibrator and small workpiece cannot be fixed together vibration and cause cannot to the problem of Small Workpieces vibration stress relief treatment.But, when adopting this device centering miniature workpiece to carry out oscillating aging, because vibrator vibrational frequency is not necessarily consistent with the frequency of the platform being installed with workpiece, that is, this device is difficult to the frequency controlling the workpiece be arranged on platform accurately, thus causes the effect of vibration stress relief of middle-size and small-size workpiece unsatisfactory.
Summary of the invention
The object of this invention is to provide a kind of mode wideband vibratory stress reliefing equipment, solve Small Workpieces ageing treatment and not easily realize, the technical problem of poor processing effect.
Another object of the present invention is to provide and utilizes above-mentioned mode wideband vibratory stress reliefing equipment, carries out the control method of secular vibration, solves the technical problem of Small Workpieces ageing treatment weak effect.
Mode wideband vibratory stress reliefing equipment of the present invention, comprises the vibration source part driving workpiece to produce secular vibration, and the pilot circuit part gathering vibration source working condition signal, drive vibration source to vibrate, wherein:
Described vibration source comprises linear electric motors, drives Workpiece vibration by the output shaft of linear electric motors;
Described pilot circuit comprises position transducer module, Real Time Drive control module, integrative display processing module, and position transducer module is for gathering the time domain working condition signal of vibration source; Real Time Drive control module, for receiving described time domain working condition signal, has been implemented modal analysis and vibration data calculating, the frequency domain vibration data of corresponding calculation result has been converted to the pilot circuit that actuate signal exports the linear electric motors of vibration source to; Integrative display processing module is for providing data communication port between system and human-computer interaction interface.
Described vibration source also comprises base, Workpiece clamping device and guide rail, described linear electric motors are fixedly mounted on base, described Workpiece clamping device by guide rails assembling on base, the output shaft of described linear electric motors is fixedly connected on Workpiece clamping device, the axis of the output shaft of described linear electric motors and guide rail parallel.
Described guide rail is line slideway, and the retaining element of guide rail is fixedly mounted on base, and the moving meter of guide rail is fixedly connected with Workpiece clamping device.
Described base is installed with return mechanism, and described Workpiece clamping device is connected with return mechanism, and described return mechanism is used for providing restoring force, and balance eliminates the nonlinear normal modes of guide rail.
Described Workpiece clamping device comprises worktable and clamping and positioning device, and worktable is used for fixed clamp locating device, and clamping and positioning device is used for workpiece location on the table, will complete the work piece of location on the table.
Described position transducer module comprises grating scale displacement sensor and laser displacement sensor,
Grating scale displacement sensor, for gathering the displacement signal during linear electric motors operating mode of the wideband vibrator of mode wideband vibratory stress reliefing equipment;
Laser displacement sensor, the displacement signal of the workpiece that gripping unit is fixed during for gathering the linear electric motors operating mode of the wideband vibrator of mode wideband vibratory stress reliefing equipment.
Described Real Time Drive control module comprises digital signal processor and programmable gate array, is connected between digital signal processor with programmable gate array by data bus;
Digital signal processor, for completing the real-time computation process of modal analysis, generating vibration data and being sent to programmable gate array; Receive the floor data of the wideband vibrator that programmable gate array transmits, complete the real-time control to wideband vibrator;
Programmable gate array, driving data for the wideband vibrator by generation is converted to the actuate signal of wideband vibrator linear electric motors, the working condition signal of wideband vibrator is converted to floor data, driving data and floor data is pressed respective communication protocol encapsulation, sends respective communications port.
Described integrative display processing module comprises flush bonding processor, for the duty parameter of wideband vibrator and different system are carried out data exchange, generates human-machine interaction data.
Carry out the control method of secular vibration according to above-mentioned mode wideband vibratory stress reliefing equipment, comprise the following steps:
Initialization control circuit, inputs the initialization data for workpiece by the human-computer interaction interface of integrative display processing module, and adjustment ageing treatment model working parameter, by flush bonding processor formation control data;
Digital signal processor in Real Time Drive control module receives control data and carries out vibration data calculating generation driving data, driving data is converted to actuate signal and exports by programmable gate array, and the wideband vibrator of mode wideband vibratory stress reliefing equipment carries out corresponding vibration;
Grating scale displacement sensor gathers displacement signal during vibration processes cathetus motor operating mode, the displacement signal of the workpiece that gripping unit is fixed when laser displacement sensor gathers the linear electric motors operating mode of mode wideband vibratory stress reliefing equipment, Real Time Drive control module, by programmable gate array real-time reception displacement signal, is sent to digital signal processor correction vibration data and calculates generative process.
Utilize the signal processing method of above-mentioned mode wideband vibratory stress reliefing equipment control circuit, it is characterized in that comprising the following steps:
Initialization control circuit and linear electric motors;
Pilot circuit passes through the time-domain signal of sensor detection of straight lines motor and workpiece;
Pilot circuit sends the first swept-frequency signal and controls the to-and-fro movement of linear electric motors output shaft, gathers the time-domain signal of workpiece simultaneously;
The time-domain signal of collection is converted to the modal parameter of frequency domain by pilot circuit, carries out modal analysis by upper computer;
The frequency data that pilot circuit is formed according to upper computer, form the second swept-frequency signal, control linear electric motors and complete vibration stress relief treatment.
Mode wideband vibratory stress reliefing equipment of the present invention controls wideband vibrator linear electric motors output shaft according to the frequency of specifying and amplitude to-and-fro movement by pilot circuit, just directly can control vibrational frequency and the amplitude of Workpiece clamping device, thus vibrational frequency and the amplitude of the workpiece fixedly mounted thereon can be controlled accurately, improve the effect of vibration stress relief of middle-size and small-size workpiece.In pilot circuit, the control process that the control signal vibrated by exciting source generates computation process, drives exciting source, separate from system, control circuit, form the Real Time Drive control module for data processing and signal control arranged side by side, for the integrative display processing module of man-machine interaction and data corresponding.Real Time Drive control module meets the generation of the big data quantity vibration data of needs real-time response in wider frequency range, complete the Real-time Collection of mode wideband vibratory stress reliefing equipment working condition parameter simultaneously, the generating process process of real-time correction vibration data, the vibration data of generation and the duty parameter of collection are further processed by integrative display processing module, complete and data exchange between different system, abundant human-computer interaction interface is provided simultaneously, the bottom data of graphical display Real Time Drive control module directly perceived, and the ageing treatment model adjustment parameter of complexity.Both can meet the real-time of oscillating aging many vibration shape vibration data, meet again and data exchange efficiency between other system.Utilize pilot circuit to carry out signal processing and can carry out precise acquisition by the time domain steady state data under the different frequent points of centering miniature workpiece, utilize the processing capability in real time of pilot circuit to form the matched curve of frequency domain steady state data for the process of upper computer formation secular vibration, effectively improve the effect of centering miniature workpiece ageing treatment.
Below in conjunction with accompanying drawing, embodiments of the invention are described further.
Accompanying drawing explanation
Fig. 1 is the stereographic map of mode wideband vibratory stress reliefing equipment of the present invention;
Fig. 2 is the front view of mode wideband vibratory stress reliefing equipment of the present invention;
Fig. 3 is the vertical view of mode wideband vibratory stress reliefing equipment of the present invention;
Fig. 4 is the using state figure of mode wideband vibratory stress reliefing equipment of the present invention;
Fig. 5 is the structural representation of mode wideband vibratory stress reliefing equipment control circuit of the present invention;
Fig. 6 is the structural representation of mode wideband vibratory stress reliefing equipment control circuit embodiment Position Sensor module of the present invention;
Fig. 7 is the structural representation of Real Time Drive control module in mode wideband vibratory stress reliefing equipment control circuit embodiment of the present invention;
Fig. 8 is the structural representation of integrative display processing module in mode wideband vibratory stress reliefing equipment control circuit embodiment of the present invention;
Fig. 9 is the workflow schematic diagram of the signal processing method of mode wideband vibratory stress reliefing equipment of the present invention;
Figure 10 is the time-domain signal schematic diagram that in the signal processing method of mode wideband vibratory stress reliefing equipment of the present invention, first sine sweep signal control linear electric motors to-and-fro movement produces.
Embodiment
It is little that mode wideband vibratory stress reliefing equipment of the present invention takes full advantage of linear electric motors movement inertia, the feature that dynamic response is rapid and positioning precision is high, the wideband vibrator formed, Binding number word control circuit on its linear electric motors basic structure basis, completes applicable line motor carries out vibration stress relief treatment technical scheme to Small Workpieces.
As shown in Figure 1, mode wideband vibratory stress reliefing equipment of the present invention comprises base 1, linear electric motors 2, Workpiece clamping device 3 and guide rail 4.Base 1 comprises base plate 11, fore-stock 12 and after poppet 13, and base plate 11 is a rectangular flat, and the front and back sides of the right-hand member of base plate 11 is bolted installing front support 12 and after poppet 13.Linear electric motors 2 and guide rail 4 are all fixedly mounted on the base plate 11 of base 1, and linear electric motors 2 are positioned at the left side of guide rail, and guide rail 4 is line slideway, adopt intersection circular cone roller linear guide rail in the present embodiment.The retaining element 41 of guide rail 4 is fixedly mounted on base 1 by backing plate 14, and the moving meter 42 of guide rail 4 is fixedly connected with Workpiece clamping device 3.The axis of the output shaft of linear electric motors 2 is parallel with guide rail 4, and guide rail 4 and Workpiece clamping device 3 are all between fore-stock 12 and after poppet 13.
Shown in composition graphs 2, Workpiece clamping device 3 comprises worktable 31, as the first fixture block 32 of clamping and positioning device, second fixture block 33 and the 3rd fixture block 34, first fixture block 32 and the second fixture block 33 are mounted by means of bolts on worktable 31, first fixture block 32 and the second fixture block 33 symmetrical, 3rd fixture block 34 is arranged between the first fixture block 32 and the second fixture block 33, the right flank of the 3rd fixture block 34 and the left surface of the second fixture block 33 fit, this binding face is tilted to the left from top to bottom, 3rd fixture block 34 upper surface offers bolt hole, worktable 31 also offers bolt hole, 3rd fixture block 34 is mounted by means of bolts on worktable 31, bolt hole on worktable 31 is slightly larger than the diameter of bolt, to adapt to the change of bolt position during fastening 3rd fixture block 34.By binding face being set to the inclined-plane with certain angle, can being the clamping force of left and right directions by the goes through torque conversion of bolt, more effectively can transmitting clamping force.Cushion block 36 can also be set between the first fixture block 32 and the 3rd fixture block 34, for the clamping of the workpiece of different thickness.Shown in composition graphs 3, worktable 31, first fixture block 32, second fixture block 33, the 3rd fixture block 34 and cushion block 36 all offer lightening hole.
As shown in Figure 3, the fore-stock 12 and after poppet 13 of base 1 are all installed with a spring 5 as return mechanism, the both sides being arranged on guide rail 4 of two spring 5 symmetries, every root spring 5 is all parallel with guide rail 4, and the two ends, left and right of two springs 5 are all fixedly mounted on the leading flank of fore-stock 12 and the trailing flank of after poppet 13 respectively by fixed supporting leg 6.Shown in composition graphs 2, the forward and backward side of the worktable 31 of Workpiece clamping device 3 is installed with Change-over frame 35 with bolt respectively, and Change-over frame 35 is in T shape.Be installed with a connection leg 7, two connection legs 7 respectively in the lower end of the front and rear sides of two Change-over frames 35 between two springs 5, all connection legs 7, fixed supporting leg 6 are all in same level.Two connection legs 7 are fixedly connected with the middle part of two springs 5 respectively, to eliminate the nonlinear normal modes of guide rail 4.
This device also only can use a spring 5, and mounting means is the same with the mounting means of above-described embodiment, overcomes the nonlinear normal modes of guide rail.Also can use two springs, two springs are arranged on the both sides, front and back of Workpiece clamping device, and one end of spring is fixedly connected with base, and the other end of spring is fixed on Workpiece clamping device, can overcome the nonlinear normal modes of guide rail equally.
This device in use, as shown in Figure 4, be first fixedly mounted on Workpiece clamping device 3 by workpiece 8, the output shaft then controlling linear electric motors 2 moves back and forth with the frequency of setting, thus drive the workpiece 8 be fixedly mounted on Workpiece clamping device 3 to vibrate, realize the vibration stress relief treatment of workpiece 8.
This apparatus structure is compact, the mode that is installed is flexible, high frequency, very high frequency(VHF) exciting force is produced by the microscopic deformation of material in straight reciprocating motion, physical construction has been abandoned traditional rotating eccentricity mechanism, while reduction noise pollution and overall power, significantly improve the Reliability & Maintainability of equipment.This device is suitable for long-time running, easy to maintenance, and exciting force can on-line control.
The exciting force of mode wideband vibratory stress reliefing equipment of the present invention can realize the on-line control between zero to the maximum value of Whole frequency band inherence, on-line control can be carried out for different vibration strains and unrelieved stress size to be processed, improve efficiency and the effect of oscillating aging; Cross peak problem when solving motor continuous frequency conversion in vibration processes simultaneously---the range of decrease crosses over the vibrator or workpiece breakage that system resonance frequency causes to avoid resonating fast.And traditional vibrator large eccentricity rotating speed by metal works resonance zone time, such as 100HZ, corresponding motor speed 6000rpm, motor and workpiece produce and resonate, cause electric machine operation state unstability, electric current and amplitude sharply become large, exceed motor tolerance range, system outage, and there is not this phenomenon in linear electric motors vibrator.
Because mode wideband vibratory stress reliefing equipment exports the broadband properties (0Hz ~ 3KHz of exciting force, tradition vibrator frequency range: 0 ~ 167HZ), HF oscillation can be realized, and (vibration kenel can realize: distortion, bending, bending combination etc. to realize the vibration of many vibration shape at multiple Frequency point, and traditional vibrator generally only has a kind of vibration kenel, limited to unrelieved stress eradicating efficacy, and unrelieved stress becomes distributed in three dimensions in metal inside, only has many vibration shape effect better.), be specially adapted to the spectrum harmonics ageing treatment of high rigidity (as high strength alumin ium alloy, titanium alloy etc.) or baroque middle-size and small-size test specimen, also can be applicable to the rapidly and efficiently rate spectrum harmonics ageing treatment of general test specimen, therefore, this device is comparatively suitable for the high-strength material of weapon industry or aerospace field and the destressing ageing treatment of abnormally-structured middle-size and small-size test specimen.The broadband of mode wideband vibratory stress reliefing equipment of the present invention and exciting force is adjustable can also be applied in the clear and definite crisp rigid test specimen in counter stress concentration zones, or cracky, yielding test specimen spectrum harmonics timeliness in.Such workpiece, due to crisp rigid or yielding, has more harsh requirement to the control of amplitude of exciting force and vibrational frequency.
The existing pilot circuit of the wideband vibrator linear electric motors that mode wideband vibratory stress reliefing equipment comprises is the necessary component realizing the control of wideband vibrator.
As shown in Figure 5, mode wideband vibratory stress reliefing equipment control circuit of the present invention is made up of the pilot circuit of position transducer module 100, Real Time Drive control module 200, integrative display processing module 300 and wideband vibrator 50 linear electric motors,
Position transducer module 100, the status signal of moving parts during for gathering wideband vibrator 50 operating mode, the status signal that conditioning gathers;
Real Time Drive control module 200, for the initialization data according to the ageing treatment model stored and pending workpiece, carry out vibration data calculating, generate the control data of wideband vibrator 50, be converted to the linear motor control circuit that actuate signal exports wideband vibrator 50 to;
The floor data of the wideband vibrator 50 that receiving sensor gathers, participates in the calculating of vibration data, forms the control data revised;
Transmit the floor data of wideband vibrator 50 to integrative display processing module 300;
Receive the controling parameters of the vibration data computation process that integrative display processing module 300 transmits;
Integrative display processing module 300, for providing data communication port between system and human-computer interaction interface, receive and store the floor data of wideband vibrator 50 that Real Time Drive control module 200 sends, generating and sending mode wideband vibratory stress reliefing controling parameters.
Wideband vibrator pilot circuit of the present invention also comprises power supply 60, for providing 150V working power for the linear electric motors of wideband vibrator 50, for Real Time Drive control module 200 provides 24V working power, for integrative display processing module 300 provides 220V working power.
As shown in Figure 6, position transducer module 100 comprises grating scale displacement sensor 110 and laser displacement sensor 120,
Grating scale displacement sensor 110, for gathering the displacement signal during linear electric motors operating mode of wideband vibrator 50;
Laser displacement sensor 120, the displacement signal of the workpiece that gripping unit is fixed during for gathering the linear electric motors operating mode of wideband vibrator 50;
As shown in Figure 7, Real Time Drive control module 200 comprises digital signal processor (DSP) 210, programmable gate array (FPGA) 220, be connected by data bus between digital signal processor 210 with programmable gate array 220, also comprise the first operand store 211 and the first static memory 212 be connected by data bus with digital signal processor 210, also comprise the second operand store 221 be connected by data bus with programmable gate array 220, second static memory 222, first ethernet port 223, serial input voltage exports digital to analog converter 224, first photoelectric coupling input/output port 225 and the first analog to digital converter 226,
Digital signal processor 210, for completing the real-time computation process of modal analysis, generating vibration data and being sent to programmable gate array 220; Receive the floor data of the wideband vibrator 50 that programmable gate array 220 transmits, complete the real-time control to wideband vibrator 50;
First operand store 211, for having stored the intermediate data in vibration data computation process;
First static memory 212, for storing the initialization data of ageing treatment model and pending workpiece;
Programmable gate array 220, driving data for the wideband vibrator 50 by generation is converted to the actuate signal of wideband vibrator 50 linear electric motors, the working condition signal of wideband vibrator 50 is converted to floor data, driving data and floor data are pressed respective communication protocol encapsulation, sends respective communications port;
Second operand store 221, for storing the intermediate data of data-switching;
Second static memory 222, for storing Data Translation model and protocol conversion model;
First ethernet port 223, for connecting the inline ethernet port 317 of integrative display processing module 300, completes the data corresponding in pilot circuit;
Serial input voltage exports digital to analog converter 224, for receiving the displacement signal that grating scale displacement sensor 110 gathers, sends the actuate signal of wideband vibrator 50 linear electric motors;
First photoelectric coupling input/output port 225, for receiving the displacement signal that laser displacement sensor 120 gathers;
First analog to digital converter 226, for receiving corresponding state simulation parameter during wideband vibrator 50 operating mode;
Utilize programmable gate array can complete at a high speed the collection of floor data, improve the signals collecting efficiency in the unit time, reduce the performance requriements of digital signal processor, make digital signal processor can give full play to the speciality of high-speed data process, be absorbed in mode wideband vibration data treating processes, form accurate wideband vibrator driving data, complete generating date with programmable gate array and synchronous while, complete asynchronous communication with human-computer interaction interface, complete data interaction.
As shown in Figure 8, integrative display processing module 300 comprises flush bonding processor 310, and the first serial port 311, second serial port 312, video dac 313, second photoelectric coupling input/output port 314, second analog to digital converter 315, USB port 316, the inline ethernet port 317 to be connected by data bus with flush bonding processor 310, outreach ethernet port 318, the 3rd operand store 319 and the 3rd static memory 320
Flush bonding processor 310, for the duty parameter of wideband vibrator 50 and different system are carried out data exchange, generates human-machine interaction data;
First serial port 311, for providing RS232 communication port;
Second serial port 312, for providing RS485 communication port;
Video dac 313, for being converted to vision signal by display data in human-computer interaction interface;
Second photoelectric coupling input/output port 314, the isolation for completing electrical signal receives and sends;
Second analog to digital converter 315, for the simulation parameter of reception control circuit periphery;
USB port 316, for the input signal in recipient's machine interactive interface;
Inline ethernet port 317, for connecting the first ethernet port 223 of Real Time Drive control module 200, completes the data corresponding in pilot circuit;
Outreaching ethernet port 318, for connecting the corresponding ethernet port of other system, completing the data corresponding of pilot circuit and other system;
3rd operand store 319, for storing the intermediate data in data exchange process;
3rd static memory 320, for storing standard agreement and the reference data of data exchange;
Utilize the universal of flush bonding processor, interactive process and mode wideband vibration data treating processes are separated, the interface quantity of pilot circuit and type can be made to enrich, be conducive to being connected of pilot circuit and Upper system, make mode wideband vibration data treating processes can be subject to the real-time monitoring of Upper system, utilize the data analysis capabilities of Upper system, data processing corrected parameter can be fed back in time mode wideband vibration data treating processes, improve secular vibration treatment effect.Integrative display processing module 300 is by prefabricated flow control model, or the floor data that modal analysis transaction module transmits in conjunction with Real Time Drive control module 200, can be formed digital signal processor 210 effective control parameter, the treating processes between digital signal processor 210 and programmable gate array 220 can be revised in time when closed-loop control comes to an end.
In the present embodiment, flush bonding processor 310 adopts LPC3250 family chip, 3rd operand store 319 adopts IS42S16160 family chip, 3rd static memory 320 adopts K9F2G08 family chip, inline ethernet port 317 and outreach ethernet port 318 and adopt KSZ8041 family chip, digital signal processor 210 adopts ADSP-BF518F family chip, programmable gate array 220 adopts match SEL Sparta six family chip, first operand store 211 adopts MT48LC32M16A2TG family chip, first static memory 212 adopts M29W320Eb70N family chip family chip, second operand store 221 adopts MT46H32M16LFBF family chip, second static memory 222 adopts N25Q128A13BSF40F family chip, first ethernet port 223 adopts DP83848K family chip, first serial port 311 and the second serial port 312 adopt MAX3232ID family chip, video dac 313 adopts ADV7125KSTZ140 family chip, first photoelectric coupling input/output port 225 and the second photoelectric coupling input/output port 314 adopt HCPL181 family chip, first analog to digital converter 226 and the second analog to digital converter 315 adopt AD7606 family chip, USB port 316 adopts TUSB2046BIVF family chip, serial input voltage exports digital to analog converter 224 and adopts AD5752R family chip.
The existing pilot circuit of above-mentioned hardware configuration and linear electric motors is utilized to carry out communication control and data gathering, the the first analog signal output pin and the second analog signal output pin that export digital to analog converter 224 by serial input voltage are connected two control signal input terminuss of linear motor control circuit respectively, output difference dividing control signal, controls operating frequency and the working current of linear electric motors.Adopt differential signal transmission effectively can overcome the dynamoelectric signal produced when linear electric motors are in high-frequency work state, to the common mode interference of the control signal of synchronous transmission, improve the immunity from interference of control signal, the error of control signal is significantly reduced.
The enable signal output terminal of the first photoelectric coupling input/output port 225 connects the enable input terminus of linear motor control circuit, the faint high frequency electrical signal produced when isolation Real Time Drive control module 200 high speed process chip and peripheral circuit work, ensure that enable signal is accurately reliable, make the working order of linear electric motors be subject to the control of difference control signal and enable signal, and the interference of adjacent circuit is all avoided in the transmission of two paths of signals simultaneously.Time so in working order, the various working parameters of linear electric motors just have the reliability of height, and the status data quality of collection is just guaranteed.
Displacement signal, frequency signal and amplitude signal when first analog to digital converter 226 gathers linear electric motors operating mode respectively by three groups of pins, often organize two pins that pin comprises the differential signal of reception one type working condition signal.Differential signal is converted to corresponding single-ended signal formation image data and is sent to programmable gate array 220 by the first analog to digital converter 226.Ensure that linear electric motors accurately can perform control signal by above circuit structure, Real Time Drive control module 200 can precise acquisition working condition signal.
The method utilizing mode wideband vibratory stress reliefing equipment control circuit of the present invention to control wideband exciting force of exciter, comprises the following steps:
Initialization control circuit, inputs the initialization data for workpiece by the human-computer interaction interface of integrative display processing module 300, and adjustment ageing treatment model working parameter, by flush bonding processor 310 formation control data;
Digital signal processor 210 in Real Time Drive control module 200 receives control data and carries out vibration data calculating generation driving data, and driving data is converted to actuate signal and exports by programmable gate array 220, and wideband vibrator 50 carries out corresponding vibration;
Grating scale displacement sensor 110 gathers displacement signal during vibration processes cathetus motor operating mode, the displacement signal of the workpiece that gripping unit is fixed when laser displacement sensor 120 gathers the linear electric motors operating mode of wideband vibrator 50, Real Time Drive control module 200, by each working condition signal of programmable gate array 220 real-time reception, is sent to digital signal processor 210 and revises vibration calculating generative process; Generate vibration data;
Driving data is converted to actuate signal and exports by programmable gate array 220, and wideband vibrator 50 carries out corresponding vibration.
In actual applications, pilot circuit driven-mode wideband vibratory stress reliefing equipment upper sensor and linear electric motors driving circuit, export sine sweep signal, gather the steady state data of workpiece and carry out time-frequency domain conversion, form upper computer steady-state analysis data basis, and form the sine sweep signal driving linear electric motors to carry out secular vibration according to the steady-state analysis result received.The signal processing method key step of mode wideband vibratory stress reliefing equipment control circuit comprises:
Initialization control circuit and linear electric motors;
Pilot circuit passes through the time-domain signal of sensor detection of straight lines motor and workpiece;
Pilot circuit sends the first swept-frequency signal and controls the to-and-fro movement of linear electric motors output shaft, gathers the time-domain signal of workpiece simultaneously;
The time-domain signal of collection is converted to the modal parameter of frequency domain by pilot circuit, carries out modal analysis by upper computer;
The frequency data that pilot circuit is formed according to upper computer, form the second swept-frequency signal, control linear electric motors and complete vibration stress relief treatment.
As shown in Figure 9, the workflow of the signal processing method of mode wideband vibratory stress reliefing equipment of the present invention is as follows:
S100, wideband vibrator, pilot circuit bootloader;
S200, pilot circuit, by time domain shift signal during displacement sensor detection of straight lines motor operating mode, detects the time domain shift signal of workpiece;
S300, pilot circuit sends the first sine sweep signal to linear electric motors, controls linear electric motors with high-frequency signal to-and-fro movement;
S400, pilot circuit gathers the time-domain signal that in linear electric motors moving process, workpiece produces;
S500, according to displacement signal, pilot circuit judges that whether linear electric motors working order is normal, complete the transmission of high-frequency controling signal when working order is normal;
S600, setting point is sweep limit frequently, according to the some sweep limit frequently of setting, repeats s300 ~ s500;
S700, the signal procesing in time domain of collection is the modal information of frequency domain by pilot circuit, uploads upper computer and carries out modal analysis;
S800, pilot circuit receives the model frequency processing data that upper computer sends, and forms the second sine sweep signal;
S900, pilot circuit sends the second sine sweep signal to linear electric motors, controls linear electric motors and completes vibration stress relief treatment.
The time-domain signal collection to Small Workpieces vibration can be completed according to above signal processing method, the formation of state simulation of frequency region information and analysis, form the model frequency data overcoming Small Workpieces internal stress, be converted to the sine sweep signal controlling oscillating aging, effectively utilize the frequency response characteristic of mode wideband vibratory stress reliefing equipment.
As shown in Figure 10, change in time in the time domain, the also dynamic change of sinusoidal wave amplitude.
In s300, the first sine sweep signal sets that pilot circuit sends is as follows:
u(t)=Acos(ωt)； 1－1
A is the amplitude controlling to export;
When set original state as zero time, wherein
ω=2πf
curr； 1－2
Wherein: f
currfor the oscillation frequency of current excitation signal;
F
iSRfor DSP sample frequency, such as, be 16kHz;
The the first sine sweep signal can releasing arbitrary frequency according to formula 1-1,1-2,1-3 is as follows:
i=1,...,N N=16k 1－4
Can time domain speed signal v (i) be formed according to time domain shift signal y (i) detected in s200:
v(i)=(y(i)-y(i-1))/f
ISRy(0)=0i=1,...,N 1－5
According to lineary system theory:
i=1,...,N 1－6
G
0(e
jw) be the transport function after System Discrimination;
Transient is transient error;
Do not consider Transient State Influence, noise jamming item n (i) removed on formula 1-6 summation and can obtain the impact of calculation result:
Wherein N is the sampling number under the actuation signal of designated frequency;
Ic(N) be the S territory real part of output frequency composition;
Is(N) be the S territory imaginary part of output frequency composition;
And then workpiece amplitude signal steady-state performance on that frequency can be calculated be:
Phase angle signal steady-state performance is:
In s400, the time-domain signal of collection comprises the time-domain position signal of workpiece, time domain speed signal and time domain acceleration signal.
Use the signal processing method of mode wideband vibratory stress reliefing equipment of the present invention can make pilot circuit between a frequency swept frequency range f0 to ft, with certain frequency interval stepping, each frequency completes N u'(i altogether) export and v (i) sampling, make pilot circuit real time computation system in the steady-state performance (amplitude and phase place) of this frequency, for forming the modal information of frequency domain, uploading upper computer and carrying out modal analysis accurate real time data is provided.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (9)
1. a mode wideband vibratory stress reliefing equipment, comprises the vibration source part driving workpiece to produce secular vibration, and the pilot circuit part gathering vibration source working condition signal, drive vibration source to vibrate, and it is characterized in that:
Described vibration source comprises linear electric motors, is driven the Workpiece vibration of Workpiece clamping device clamping by the output shaft of linear electric motors;
Described pilot circuit comprises position transducer module, Real Time Drive control module, integrative display processing module, and position transducer module is for gathering the time domain working condition signal of vibration source; Real Time Drive control module, for receiving described time domain working condition signal, has been implemented modal analysis and vibration data calculating, the frequency domain vibration data of corresponding calculation result has been converted to the pilot circuit that actuate signal exports the linear electric motors of vibration source to; Integrative display processing module is for providing data communication port between system and human-computer interaction interface;
Described position transducer module (100) comprises grating scale displacement sensor (110) and laser displacement sensor (120),
Grating scale displacement sensor (110), for gathering the displacement signal during linear electric motors operating mode of the wideband vibrator (50) of mode wideband vibratory stress reliefing equipment;
Laser displacement sensor (120), the displacement signal of the workpiece that gripping unit is fixed during for gathering the linear electric motors operating mode of the wideband vibrator (50) of mode wideband vibratory stress reliefing equipment.
2. mode wideband vibratory stress reliefing equipment according to claim 1, it is characterized in that: described vibration source also comprises base (1), Workpiece clamping device (3) and guide rail (4), described linear electric motors (2) are fixedly mounted on base (1), described Workpiece clamping device (3) is arranged on base (1) by guide rail (4), the output shaft of described linear electric motors (2) is fixedly connected on Workpiece clamping device (3), and the axis of the output shaft of described linear electric motors (2) is parallel with guide rail (4).
3. mode wideband vibratory stress reliefing equipment according to claim 2, it is characterized in that: described guide rail (4) is line slideway, the retaining element of guide rail (4) is fixedly mounted on base (1), and the moving meter of guide rail (4) is fixedly connected with Workpiece clamping device (3).
4. mode wideband vibratory stress reliefing equipment according to claim 3, it is characterized in that: (1) is installed with return mechanism to described base, described Workpiece clamping device (3) is connected with return mechanism, described return mechanism is used for providing restoring force, and balance eliminates the nonlinear normal modes of guide rail (4).
5. mode wideband vibratory stress reliefing equipment according to claim 4, it is characterized in that: described Workpiece clamping device (3) comprises worktable and clamping and positioning device, worktable is used for fixed clamp locating device, clamping and positioning device is used for workpiece location on the table, will complete the work piece of location on the table.
6. according to the arbitrary described mode wideband vibratory stress reliefing equipment of claim 1 to 5, it is characterized in that: described Real Time Drive control module (200) comprises digital signal processor (210) and programmable gate array (220), is connected between digital signal processor (210) with programmable gate array (220) by data bus;
Digital signal processor (210), for completing the real-time computation process of modal analysis, generating vibration data and being sent to programmable gate array (220); Receive the floor data of the wideband vibrator (50) that programmable gate array (220) transmits, complete the real-time control to wideband vibrator (50);
Programmable gate array (220), for the driving data of the wideband vibrator (50) generated being converted to the actuate signal of wideband vibrator (50) linear electric motors, the working condition signal of wideband vibrator (50) is converted to floor data, driving data and floor data are pressed respective communication protocol encapsulation, sends respective communications port.
7. mode wideband vibratory stress reliefing equipment according to claim 6, it is characterized in that: described integrative display processing module (300) comprises flush bonding processor (310), for the duty parameter of wideband vibrator (50) and different system are carried out data exchange, generate human-machine interaction data.
8. carry out the control method of secular vibration according to the arbitrary described mode wideband vibratory stress reliefing equipment of claim 1 to 7, it is characterized in that comprising the following steps:
Initialization control circuit, inputs the initialization data for workpiece by the human-computer interaction interface of integrative display processing module (300), and adjustment ageing treatment model working parameter, by flush bonding processor (310) formation control data;
Digital signal processor (210) in Real Time Drive control module (200) receives control data and carries out vibration data calculating generation driving data, driving data is converted to actuate signal and exports by programmable gate array (220), and the wideband vibrator (50) of mode wideband vibratory stress reliefing equipment carries out corresponding vibration;
Grating scale displacement sensor (110) gathers displacement signal during vibration processes cathetus motor operating mode, the displacement signal of workpiece that when laser displacement sensor (120) gathers the linear electric motors operating mode of wideband vibrator (50), gripping unit is fixed, Real Time Drive control module (200), by programmable gate array (220) real-time reception displacement signal, is sent to digital signal processor (210) and revises vibration data calculating generative process.
9. utilize the arbitrary described mode wideband vibratory stress reliefing equipment control circuit of claim 1 to 7 to carry out the method for signal processing, it is characterized in that comprising the following steps:
Initialization control circuit and linear electric motors;
Pilot circuit passes through the time-domain signal of sensor detection of straight lines motor and workpiece;
Pilot circuit sends the first swept-frequency signal and controls the to-and-fro movement of linear electric motors output shaft, gathers the time-domain signal of workpiece simultaneously;
The time-domain signal of collection is converted to the modal parameter of frequency domain by pilot circuit, carries out modal analysis by upper computer;
The frequency data that pilot circuit is formed according to upper computer, form the second swept-frequency signal, control linear electric motors and complete vibration stress relief treatment.
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| CN1298771A (en) * | 2000-12-22 | 2001-06-13 | 甘肃天星稀土功能材料有限公司 | Vibration generator and method for eliminating residual stress of metal parts with it |
| CN101225466A (en) * | 2008-01-24 | 2008-07-23 | 郝俊山 | Novel vibration aging method |
| CN202022962U (en) * | 2010-12-31 | 2011-11-02 | 北京翔博科技有限责任公司 | Device for controlling frequency-spectrum harmonic vibration stress relief |
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| CN1298771A (en) * | 2000-12-22 | 2001-06-13 | 甘肃天星稀土功能材料有限公司 | Vibration generator and method for eliminating residual stress of metal parts with it |
| CN101225466A (en) * | 2008-01-24 | 2008-07-23 | 郝俊山 | Novel vibration aging method |
| CN202022962U (en) * | 2010-12-31 | 2011-11-02 | 北京翔博科技有限责任公司 | Device for controlling frequency-spectrum harmonic vibration stress relief |
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