CN101620431A - Digital control method and system for carrying out real-time compensation for thermal deformation errors - Google Patents
Digital control method and system for carrying out real-time compensation for thermal deformation errors Download PDFInfo
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Abstract
The invention discloses a digital control method and a system for carrying out real-time compensation for thermal deformation errors of working machines. The prior technique of real-time compensation for thermal deformation errors depends on mathematical models and error compensation equations. The invention is not concerned about the mechanism and the process of the generation of thermal deformation errors caused by many nonlinear factors, does not need to establish highly specialized complex mathematical models and error compensation equations, but is only concerned about the comprehensive effect actually generated by the nonlinear factors, namely the distribution of the thermal deformation errors in different temperature ranges. For the thermal deformation errors in the expected temperature range, a plurality of groups of distribution matrices of multidimensional associated data streams with formatted fine structures are generated to carry out real-time comprehensive compensation for many kinds of multiaxial thermal deformation errors. The method is open and restructurable.
Description
Technical field
The invention belongs to advanced control field, relate to the computer numerical control (CNC) technology, specifically relate to digital control method and system that a kind of thermal deformation errors to working machine carries out real-Time Compensation.
Background technology
Accurate, ultraprecise processing is indispensable manufacturing process in the sophisticated technology development, is the forward position in present advanced manufacturing field.Accurate, ultraprecise numerically-controlled machine is to realize the precision machined most important condition, is the important foundation equipment of realizing advanced manufacturing technology.
Certainly lead to many errors in the lathe manufacturing, in the machine tooling process, certainly lead to new error again.In control system these errors being carried out real-Time Compensation is to improve a kind of cost-effective technological means of machine finish, has become one of gordian technique of domestic and international modern precision engineering at present.
Geometric error, thermal deformation errors and cutting force error are three mistake sources accurate, the ultraprecise numerically-controlled machine.Geometric error is meant the error that is caused by the manufacturing of lathe zero, parts and assembling out of true, by manufacturing, assembling, the adjustment accuracy decision of lathe itself.With respect to the process of part, geometric error is a kind of static error.Because of cutting force changes the workpiece error that causes, be referred to as the cutting force error in the process.The cutting force error is a kind of dynamic error that changes with machining load.In precision, ultraprecise numerically-controlled machine, the cutting force error is very important.
In process, outside and interior environment temperature all changes, and each parts of lathe, cutter, workpiece are all because of the generation thermal deformation of being heated.The error that is caused by thermal deformation is referred to as thermal deformation errors.Thermal deformation errors is not only a kind of dynamic error that changes with environment temperature, and is a kind of composition error that had not only related to the single shaft error but also related to interaxis error.A large amount of researchs point out that thermal deformation errors accounts for 40%～70% of total error, are to influence accuracy factors in the modern precision technology.Therefore, thermal deformation error compensation becomes the gordian technique that the modern digital control technology needs to be resolved hurrily.
The certain material and the ad hoc structure of thermal deformation errors and specific lathe are closely related.Along with the precision of pin point technique improves constantly, the influence of thermal deformation errors is more and more big.On the other hand, along with the increase of coordinate axis, the quantity of the geometric error that thermal deformation caused increases with index.Particularly, thermal deformation must influence nonparallelism, the non-perpendicularity of between centers, and existing digital control system can't be carried out error compensation to the nonparallelism of between centers, non-perpendicularity etc.Systematic errors such as the nonparallelism of between centers, non-perpendicularity are the dead angles of existing digital control system.These all cause the complicacy of thermal deformation errors.The problem that need research and solve is intricate, all has bigger difficulty on theory and practice.At present, external thermal deformation errors real-Time Compensation technology does not also reach the commercialization degree.Domestic thermal deformation errors real-Time Compensation technology still is in the initial stage of experiment research and development.
For numerically-controlled machine accurate, ultraprecise processing, generally all be installed in the operating room of constant temperature, the temperature of external environment condition can be thought constant.The dissipativeness heat energy that variation produced of the power consumption of motor, the friction between the kinematic pair, the internal environments such as thermal effect when cutting is the fundamental cause that causes thermal deformation errors in the process.Chinese patent application " based on the numerically-controlled machine real time error compensator of lathe exterior coordinate system biasing " (application number: 200410093428.1, the applying date: on Dec 23rd, 2004) and " the thermal distortion compensation method of numerically-controlled machine main transmission " (application number: 200610021281.4, the applying date: on 06 28th, 2006) disclosed some implementation methods of thermal deformation error compensation.Its method for thermal deformation error compensation all is at first to be measured adding the temperature and the thermal deformation errors that produce man-hour by temperature and displacement transducer, carry out the Modeling Calculation analysis by special purpose computer then, mathematical model according to error compensation is set up error compensation equations, carrying out error compensation calculates, at last offset is imported digital control system, make it to carry out error compensation.
The defective of existing method for thermal deformation error compensation is:
1, existing method for thermal deformation error compensation requires to set up mathematical model again and derive error compensation equations after the distribution that detects thermal deformation errors, then according to the environment temperature that detects in real time, adopt special purpose computer, under the control of real time operating system, carry out error compensation in real time and calculate, finish steps such as error compensation.Thereby existing method for thermal deformation error compensation depends on the complicated error compensation mathematical model and the foundation of error compensation equations, obviously is highly-specialised, thereby is non-opening.
2, thermal deformation errors is a kind of dynamic error, and is both relevant with environment temperature, relevant with the certain material and the ad hoc structure of specific lathe again, has suitable uncertainty; After lathe reconstruct, this uncertainty almost reaches the degree of completely random.Thereby existing method for thermal deformation error compensation does not have reconfigurability.
3, the mathematical model of existing method for thermal deformation error compensation utilization comprises: thermodynamical model, linear regression model (LRM), multivariate regression model, finite element model, neural network model and fuzzy control model.Yet thermal deformation errors depends on the certain material and the ad hoc structure of specific lathe, is a kind of nonlinearity erron of personalization.Because the error identification overlong time of error compensation mathematical model can not be provided personalized service, be difficult to multiaxis is realized the real time comprehensive compensation of multiple error.Thereby existing method for thermal deformation error compensation can only carry out the individual event thermal deformation error compensation of single shaft, for example, compensates at main shaft and axial thermal deformation errors thereof.
4, existing method for thermal deformation error compensation depends on the appropriate mathematical model, and sets up so-called error compensation equations.More than the model, the length of identification time shows the non-linear complexity of thermal deformation errors on theory and practice.On philosophy, to set up by the motor pattern under some equation dominations for the process attempt of non-linear complexity, this is the reflection of newton, the linear world view of einstein.Thereby this method is not that complicated problems is oversimplified, and divides and change it, but complicated problems is bundled, and further non-linear complicated.
The applicant's patented claim formerly " a kind of digital control method and system thereof that geometric error is carried out real-Time Compensation " (Chinese patent application number: 200910107400.1, the applying date: on May 22nd, 2009) adopt the DRC control technology that the geometric error of lathe is carried out real-Time Compensation.Displacement of the lines error, angular displacement error, backlass with axle, and geometric errors such as the nonparallelism of between centers, non-perpendicularity completely are summed up as the textural constant of nonopiate discrete coordinates system, set up a textural constant database for this working machine in the control information manufacturing system.Wherein, the nonparallelism of between centers, non-perpendicularity are referred to as the coordinate system parameter, the macroscopic motion structure of identification axes; The displacement of the lines error of axle, angular displacement error, backlass etc. are referred to as the fine structure constant of axle, the microscopic motion structure of identification axes.Coordinate system parameter according to working machine, control information manufacturing system off-line in nonopiate discrete coordinates is generates the multidimensional associated data stream, and the displacement of the lines error of axle, angular displacement error, backlass etc. are proofreaied and correct according to the fine structure constant of working machine, generate format fine structure multidimensional associated data stream distribution matrix, send to the programmable data stream controller by fieldbus then, export to working machine with the motor-driven work of Control work.The DRC control technology has been removed the real-time oss a series of problems with non-linear complexity that the interpolation iteration control produced of unifying fully, the foundation of nonopiate discrete coordinates system then divides single shaft errors such as the displacement of the lines error of between centers geometric errors such as the nonparallelism of between centers, non-perpendicularity and axle, angular displacement error, backlass and changes it, thereby nonparallelism, the non-perpendicularity of between centers is regarded as the dead angle that the coordinate system parameter has been eliminated existing digital control system.
But a kind of cost-effective compensation method of hard real time the composition error that thermal deformation produced is not proposed in above-mentioned patented claim technology.
Summary of the invention
Technical matters to be solved by this invention is, a kind of digital control method that the thermal deformation errors of working machine is carried out real-Time Compensation is proposed, to the applicant's patented claim formerly " a kind of digital control method and system that geometric error is carried out real-Time Compensation " (Chinese patent application number: 200910107400.1, the applying date: on May 22nd, 2009) further improved, to adapt to the variation of working machine textural constant, for the real-Time Compensation of thermal deformation errors provides a kind of technical method, improve the degree of accuracy and the stability of digital control system.
Basic ideas of the present invention are: thermal deformation errors depends on the non-linear factor of many complexity.Existing digital control system detects the distribution of thermal deformation errors in the different temperatures interval earlier, adopt all mathematical models and set up error compensation equations, by special purpose computer, under the control of real time operating system, carry out error compensation in real time and calculate again, finish thermal deformation error compensation.The present invention does not pay close attention to mechanism and the process that these non-linear factors produce thermal deformation errors, is the distribution of thermal deformation errors in the different temperatures interval and only pay close attention to the comprehensive effect that these non-linear factor reality are produced.According to the coordinate system parameter of lathe in a certain temperature range, control information manufacturing system off-line in nonopiate discrete coordinates is generates the multidimensional associated data stream, and the multidimensional associated data stream is proofreaied and correct in the fine structure constant of this temperature range according to lathe, generate format fine structure multidimensional associated data stream distribution matrix.Exceed given temperature range in case temperature raises, the textural constant of lathe changes, and its fine structure multidimensional associated data stream distribution matrix also can become thereupon.Therefore, interval for the reply temperature raises and surpasss the expectation can be provided with " emergency preplan " in the PC system, that is to say, at the temperature range of some expections, the PC system generates corresponding format fine structure multidimensional associated data stream distribution matrix in advance and is stored in the relevant data file.In lathe when work,, the temperature variation of internal environment is monitored by temperature-detecting device, and temperature-detecting device is the touring Acquisition Instrument of channel wireless radio multi temperature, or is made of the embedded temperature detector on some different parts that are installed in lathe.Temperature-detecting device detects the environment temperature of each parts of lathe, in case environment temperature exceeds current interval, promptly sends interrupt request to the programmable data stream controller, and when this interrupt request is responded, the temperature value that output is detected.Start after the interrupt request of programmable data stream controller response temperature pick-up unit " emergency procedure ", the i.e. residing temperature range of interior environment temperature that detects according to temperature-detecting device, the control information manufacturing system is taken out the corresponding format fine structure multidimensional associated data stream distribution matrix that has generated in advance from the associated data files of " emergency preplan ", the control information that the programmable data stream controller will format in the fine structure multidimensional associated data stream distribution matrix writes the data flow driven device, and sends to topworks's execution.
For this reason, technical scheme of the present invention is, this digital control method that machine tool thermal error is carried out real-Time Compensation may further comprise the steps: 1) control information manufacturing system is set up the textural constant database, stores the textural constant of the individual temperature range of N (N＞1) in described textural constant database; 2) control information manufacturing system generates N group fine structure multidimensional associated data stream according to the textural constant of each temperature range, and the row formatization of going forward side by side generates N group format fine structure multidimensional associated data stream distribution matrix; 3) control information manufacturing system sends to data flow control according to the temperature tactics of setting with one group or N group format fine structure multidimensional associated data stream distribution matrix, correspondingly, the programmable data stream controller loads format fine structure multidimensional associated data stream distribution matrix according to temperature tactics, and exports to working machine with the motor-driven work of Control work.
Preferably, in the above-mentioned digital control method that machine tool thermal error is carried out real-Time Compensation, in the described step 3), the control information manufacturing system sends to the programmable data stream controller with N group format fine structure multidimensional associated data stream distribution matrix, the programmable data stream controller loads the format fine structure multidimensional associated data stream distribution matrix in relevant temperature interval according to the temperature of detected each parts of working machine of temperature-detecting device, and exports to working machine with the motor-driven work of Control work.
Further, in the described step 3), the programmable data stream controller at first loads the format fine structure multidimensional associated data stream distribution matrix in initial temperature interval, and exports to working machine with the motor-driven work of Control work; When the temperature that detects each parts of working machine when temperature-detecting device changes, the programmable data stream controller format fine structure multidimensional associated data stream distribution matrix in relevant temperature interval of reloading again, and export to working machine with the motor-driven work of Control work.
In the described step 3), the programmable data stream controller is reloaded between two procedures and is formatd fine structure multidimensional associated data stream distribution matrix.
The textural constant database of described step 1) comprises coordinate system parameter word bank and fine structure constant word bank, the between centers geometric error of N temperature range of storage in described coordinate system parameter word bank, the single shaft geometric error of a storage corresponding N temperature range in described fine structure constant word bank.
Described step 2) may further comprise the steps: 2.1) control information manufacturing system generates N group multidimensional associated data stream according to the coordinate system parameter of each temperature range; 2.2) the control information manufacturing system revises N group multidimensional associated data stream according to the fine structure constant of each temperature range, generate N group fine structure multidimensional associated data stream, the row formatization of going forward side by side generates format fine structure multidimensional associated data stream distribution matrix.
Preferably, the coordinate system parameter word bank of described step 1) adopts the tabulation mode to store the between centers geometric error of N temperature range.The fine structure constant word bank of described step 1) adopts the tabulation mode to store the single shaft geometric error of N temperature range.
Further, above-mentioned that machine tool thermal error is carried out the digital control method of real-Time Compensation is further comprising the steps of: 4) control information manufacturing system is accepted user instruction the textural constant database is upgraded.
The invention allows for a kind of digital control system that machine tool thermal error is carried out real-Time Compensation that adopts said method, comprise control information manufacturing system, the programmable data stream controller that is connected with the control information manufacturing system, the topworks that is connected with the programmable data stream controller, the temperature-detecting device that is connected with the programmable data stream controller, described control information manufacturing system is provided with the textural constant database, and described textural constant database is used to store the textural constant of the individual temperature range of N (N＞1); Described control information manufacturing system is used for generating N group fine structure multidimensional associated data stream distribution matrix according to the textural constant of each temperature range, and described fine structure multidimensional associated data stream distribution matrix formatd, generate N group format fine structure multidimensional associated data stream distribution matrix; Described programmable data stream controller is used for accepting format fine structure multidimensional associated data stream distribution matrix, each part temperatures that also is used for detecting according to temperature-detecting device is loaded the format fine structure multidimensional associated data stream distribution matrix in relevant temperature interval, and exports to topworks by the form of setting and carry out.
Preferably, described textural constant database adopts the textural constant of N temperature range of forms mode storage.
The present invention is compared with the prior art the beneficial effect that is had:
1, prior art just compensates at the individual event thermal deformation errors of single shaft, for example, compensates at main shaft and the caused axial error of thermal deformation thereof.The present invention then is the real time comprehensive compensation of multiaxis being carried out multiple error.
2, thermal deformation errors has non-linear complexity.Prior art adopts special purpose computer to handle these complicated problems, no matter in theory still all has bigger difficulty in practice.The present invention is the configure dedicated computing machine in addition, complicated problems is divided and changes it in the mode of " emergency preplan ", and cost is low and operability good.
3, the special purpose computer of the other configuration of prior art carries out error compensation calculating under the control of real time operating system, and offset imported digital control system, digital control system also receives offset and finishes error compensation under the control of real time operating system, the real-time of whole process is very strong, particularly for the hard real-time process such as multi-shaft interlocked of accurate, ultraprecise processing, real-time is particularly outstanding.Real-time of the present invention only depends on interrupt response and the Interrupt Process of programmable data stream controller to temperature-detecting device, is hard real time.Therefore, the present invention provides a kind of compensation method of cost-effective hard real time for the thermal deformation errors in accurate, ultraprecise processing multi-shaft interlocked.
4, prior art depends on the complicated error compensation mathematical model and the foundation of error compensation equations, be highly-specialised, thereby is non-opening.The present invention adopts tabular form, as table of trigonometric function, table of logarithm, with detecting the thermal deformation errors that obtains tables of data is made in the distribution of environment temperature, temperature axis and each coordinate axis are made up a multidimensional structure constant data storehouse, need not to set up error compensation mathematical model and error compensation equations.The adjustment of textural constant is simple and convenient, is open.
5, thermal deformation errors is relevant with the certain material and the ad hoc structure of specific lathe, and after lathe reconstruct, prior art need rebulid mathematical model and error compensation equations, adopts new Error Compensation Algorithm in special purpose computer, does not have reconfigurability.For the reconstruct of lathe, the present invention need only readjust multidimensional structure constant data storehouse to temperature axis and the new textural constant of each coordinate axis input, has reconfigurability.
Description of drawings
Fig. 1 is the architectural schematic of the digital control system of embodiment;
Fig. 2 is the process flow diagram of embodiment.
Embodiment
The digital control system of a kind of numerically-controlled machine as shown in Figure 1 comprises the topworks 4 and the temperature-detecting device 5 of control information manufacturing system 1, programmable data stream controller 3, numerically-controlled machine.Control information manufacturing system 1 is connected with programmable data stream controller 3 by fieldbus 2.Topworks 4 is connected with programmable data stream controller 3.Temperature-detecting device 5 is connected with programmable data stream controller 3, and temperature-detecting device 5 is used to monitor the temperature variation of each parts of lathe, and the temperature of detected each parts of lathe is passed to data flow control 3.
The hardware platform of control information manufacturing system 1 is general PC system, and software platform is graphical interfaces operating system, communication system etc.Control information manufacturing system 1 generates the format multidimensional associated data stream distribution matrix of multiaxis multiparameter interlock and sends programmable data stream controller 3 to, the real-time distribution of being finished the multidimensional associated data stream by programmable data stream controller 3 sends, the topworks 4 of numerically-controlled machine comprises switching system and servo-drive system, and wherein servo-drive system receives and carry out the multidimensional associated data stream.Temperature-detecting device is used to monitor the temperature variation of each parts of lathe.
As shown in Figure 2, the thermal deformation errors that utilizes said system that numerically-controlled machine is produced in the process technical method that carries out real-Time Compensation may further comprise the steps.
1, detects the geometric error of lathe.Start numerically-controlled machine exemplar is processed, for the variation of interior environment temperature, temperature-detecting device detects the geometric error that thermal deformation produced of lathe; The lathe interior environment temperature is divided into some intervals, and these intervals needn't be isometric.To each temperature range, according to the distribution of thermal deformation errors in this interval, determine the geometric errors such as displacement of the lines error, angular displacement error, backlass, nonparallelism, non-perpendicularity of axle, for example, with the mean value of error in this interval as the true value in this interval.
2, control information manufacturing system with these true value as the textural constant of this lathe and set up a multidimensional structure constant data storehouse.This multidimensional structure constant data storehouse comprises and is used to store the coordinate system parameter word bank of between centers geometric error and is used to store the fine structure constant word bank of single shaft geometric error.For each temperature range, coordinate system parameter word bank identifies between centers geometric errors such as the interior between centers nonparallelism of this temperature range, non-perpendicularity; Correspondingly, to each temperature range, the fine structure constant word bank identifies in this temperature range single shaft geometric errors such as the displacement of the lines error, angular displacement error, backlass of each.
In general, thermal deformation errors has two kinds of describing modes, i.e. function and tabulation.Existing method for thermal deformation error compensation adopts functional form, just according to the thermal deformation errors that detects acquisition mathematical model is set up in the distribution of environment temperature and is derived error compensation equations again.Adopt tabular form in this method.So-called tabular form is exactly as table of trigonometric function, table of logarithm, with detecting the thermal deformation errors that obtains tables of data is made in the distribution of environment temperature, directly is stored in the textural constant database.
3, according to the applicant's patented claim formerly " a kind of digital control method and system that geometric error is carried out real-Time Compensation " (Chinese patent application number: 200910107400.1, the applying date: the technology on May 22nd, 2009) generates different fine structure multidimensional associated data streams to each temperature range.The control information manufacturing system at first generates one group of multidimensional associated data stream according to the pairing coordinate system parameter of a certain temperature range; According to the pairing fine structure constant of this temperature range this group multidimensional associated data stream is revised, generated fine structure multidimensional associated data stream, the row formatization of going forward side by side generates format fine structure multidimensional associated data stream distribution matrix.
4, control information manufacturing system will be organized format fine structure multidimensional associated data stream distribution matrix more and send to the programmable data stream controller.According to another temperature tactics, also can only send one group of format fine structure multidimensional associated data stream distribution matrix for the first time, if find that in following step 6 the machine tool component temperature rises, the control information manufacturing system sends the format fine structure multidimensional associated data stream distribution matrix in another higher temperature interval again to the programmable data stream controller.
5, because numerically-controlled machine accurate, ultraprecise processing all is installed in the operating room of constant temperature, and can establish a certain temperature range is initial temperature, the programmable data stream controller loads the format fine structure multidimensional associated data stream distribution matrix in this initial temperature interval.The programmable data stream controller starts timer, and fine structure multidimensional associated data stream is sent to lathe topworks, with the mechanical motion of control lathe.
6. temperature-detecting device detects the temperature variation of machine tool component, and when variation of temperature exceeded the temperature range of data stream correspondence of current loading, temperature-detecting device promptly sent interrupt request to the programmable data stream controller.
7, the interrupt request of programmable data stream controller response temperature pick-up unit, the temperature that detects according to temperature-detecting device redefines temperature range, load the format fine structure multidimensional associated data stream distribution matrix in relevant temperature interval, and send to topworks's realization, thereby finish real-Time Compensation to thermal deformation errors with control function.
With respect to the process of a part, the temperature variation of internal environment is the slow process of a gradual change, rather than paroxysmal saltus step.Form a temperature field that slowly changes thereby interior environment temperature is a slow variable, thereby the variation of textural constant is not paroxysmal, but slowly, expected.For given temperature range, the textural constant of lathe thereby can think constant.This just means, for the process of miniature parts, the adjustment of textural constant is that the reload step of format fine structure multidimensional associated data stream distribution matrix of programmable data stream controller can be carried out in the clamping process of next part; For the processing of big-and-middle-sized part,, can between operation, carry out though textural constant may need to adjust in process.Textural constant will change in the process of a part if be expected at, the control information manufacturing system then in " emergency preplan " processing technology to this part plan, comprise the planning that operation is suited, the compensation that makes thermal deformation errors just being enabled between the two procedures of " emergency procedure " is carried out, to improve crudy; Fine structure multidimensional associated data stream distribution matrix to the per pass operation is identified simultaneously, to improve the real-time of " emergency procedure ".
When machine body reconstruct, its geometric error changes, the user makes amendment to the textural constant database, and the control information manufacturing system will generate fine structure multidimensional associated data stream distribution matrix according to amended geometric error in new nonopiate discrete coordinates is, and will control lathe according to this.
The present invention is applicable to the mechanical motion of Control work machine, and the thermal deformation errors of working machine is carried out real-Time Compensation, to improve the precision of mechanical motion.Above-mentioned embodiment be with the numerically-controlled machine in advanced person's manufacturing field as working machine, to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. digital control method that the thermal deformation errors of working machine is carried out real-Time Compensation, may further comprise the steps: 1) control information manufacturing system is set up the textural constant database, stores the textural constant of the individual temperature range of N (N＞1) in described textural constant database; 2) control information manufacturing system generates N group fine structure multidimensional associated data stream according to the textural constant of each temperature range, and the row formatization of going forward side by side generates N group format fine structure multidimensional associated data stream distribution matrix; 3) control information manufacturing system sends to the programmable data stream controller according to the temperature tactics of setting with one group or N group format fine structure multidimensional associated data stream distribution matrix, correspondingly, the programmable data stream controller loads format fine structure multidimensional associated data stream distribution matrix according to temperature tactics, and exports to working machine with the motor-driven work of Control work.
2. the digital control method that the thermal deformation errors of working machine is carried out real-Time Compensation as claimed in claim 1, it is characterized in that: in the described step 3), the control information manufacturing system sends to the programmable data stream controller with N group format fine structure multidimensional associated data stream distribution matrix, the programmable data stream controller loads the format fine structure multidimensional associated data stream distribution matrix in relevant temperature interval according to the temperature of detected each parts of working machine of temperature-detecting device, and exports to working machine with the motor-driven work of Control work.
3. the digital control method that the thermal deformation errors of working machine is carried out real-Time Compensation as claimed in claim 2, it is characterized in that, in the described step 3), the programmable data stream controller at first loads the format fine structure multidimensional associated data stream distribution matrix in initial temperature interval, and exports to working machine with the motor-driven work of Control work; When the temperature that detects each parts of working machine when temperature-detecting device changes, the programmable data stream controller format fine structure multidimensional associated data stream distribution matrix in relevant temperature interval of reloading again, and export to working machine with the motor-driven work of Control work.
4. the digital control method that the thermal deformation errors of working machine is carried out real-Time Compensation as claimed in claim 3, it is characterized in that, in the described step 3), the programmable data stream controller is reloaded between two procedures and is formatd fine structure multidimensional associated data stream distribution matrix.
5. the digital control method that the thermal deformation errors of working machine is carried out real-Time Compensation as claimed in claim 4, it is characterized in that, the textural constant database of described step 1) comprises coordinate system parameter word bank and fine structure constant word bank, the between centers geometric error of N temperature range of storage in described coordinate system parameter word bank, the single shaft geometric error of a storage corresponding N temperature range in described fine structure constant word bank.
6. the digital control method that the thermal deformation errors of working machine is carried out real-Time Compensation as claimed in claim 5, it is characterized in that described step 2) may further comprise the steps: 2.1) control information manufacturing system generates N group multidimensional associated data stream according to the coordinate system parameter of each temperature range; 2.2) the control information manufacturing system revises N group multidimensional associated data stream according to the fine structure constant of each temperature range, generate N group fine structure multidimensional associated data stream, the row formatization of going forward side by side generates N group format fine structure multidimensional associated data stream distribution matrix.
7. as claimed in claim 5 the thermal deformation errors of working machine is carried out the digital control method of real-Time Compensation, it is characterized in that: the coordinate system parameter word bank of described step 1) adopts the tabulation mode to store the between centers geometric error of N temperature range.
8. as claimed in claim 5 the thermal deformation errors of working machine is carried out the digital control method of real-Time Compensation, it is characterized in that: the fine structure constant word bank of described step 1) adopts the tabulation mode to store the single shaft geometric error of N temperature range.
9. digital control system that the thermal deformation errors of working machine is carried out real-Time Compensation, comprise control information manufacturing system, the programmable data stream controller that is connected with the control information manufacturing system, the topworks that is connected with the programmable data stream controller, be installed on topworks's parts and the temperature-detecting device that is connected with the programmable data stream controller, it is characterized in that:
Described control information manufacturing system is provided with the textural constant database, and described textural constant database is used to store the textural constant of N (N＞1) temperature range;
Described control information manufacturing system is used for generating N group fine structure multidimensional associated data stream according to the textural constant of each temperature range, and described fine structure multidimensional associated data stream formatd, generate N group format fine structure multidimensional associated data stream distribution matrix;
Described programmable data stream controller is used for accepting format fine structure multidimensional associated data stream distribution matrix, also be used for loading the format fine structure multidimensional associated data stream distribution matrix in relevant temperature interval, and export to topworks by the form of setting and carry out according to the temperature of detected each parts of lathe of temperature-detecting device.
10. as claimed in claim 9 the thermal deformation errors of working machine is carried out the digital control system of real-Time Compensation, it is characterized in that: described textural constant database adopts the textural constant of N temperature range of forms mode storage.
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