CN103485914A - Diesel-locomotive diesel engine rotation speed given signal calibration system and control method thereof - Google Patents
Diesel-locomotive diesel engine rotation speed given signal calibration system and control method thereof Download PDFInfo
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- CN103485914A CN103485914A CN201310442423.4A CN201310442423A CN103485914A CN 103485914 A CN103485914 A CN 103485914A CN 201310442423 A CN201310442423 A CN 201310442423A CN 103485914 A CN103485914 A CN 103485914A
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Abstract
The invention relates to the technical field of electric drive systems of diesel locomotives, in particular to a diesel-locomotive diesel engine rotation speed given signal calibration system. The system comprises a diesel engine rotation speed given signal calibration switch, a clutch gear lever, an on-board microcomputer, a diesel engine speed regulating panel, an electronic injection controller and a diesel engine rotation speed detection module. The on-board microcomputer taken as a control core is communicated with the diesel engine speed regulating panel through a bus, the diesel engine speed regulating panel is externally connected with the electronic injection controller, and the on-board microcomputer is communicated with each of the clutch gear lever and the diesel engine rotation speed detection module through a hard wire and additionally connected with the diesel engine rotation speed given signal calibration switch through a hard wire. Through the system, the defects that a conventional mode is low in control precision, large in accumulated error, susceptible to aging of components and the like can be made up, and rotation speed overshoot of no-load operation of a diesel engine in a closed-loop mode is avoided. On the basis of accurate speed reduction of the diesel engine of a diesel locomotive, requirements of locomotive operators are met to the utmost extent.
Description
Technical field
The present invention relates to internal combustion locomotive electric drive system technical field, especially a kind of diesel engine of diesel locomotive rotational speed setup signal scaling system and controlling method thereof.
Background technique
In internal combustion locomotive control system at dress with the EFI controller, the very common given signal form of a kind of diesel engine speed is PWM ripple (Pulse-Width Modulation).The EFI controller according to upper-position unit, send pwm signal pulse-width regulated diesel engine speed.Upper-position unit has two kinds of modes to the adjusting of pwm signal:
(1) normal mode
Cardinal principle is: vehicle-mounted microcomputer is implemented conventional control to the EFI controller.Vehicle-mounted microcomputer sends the pwm signal of certain pulsewidth to the EFI controller, its pulsewidth is corresponding with the main handle gear.Under same gear, the PWM pulsewidth is certain.This is in fact a kind of open loop control mode.
(2) closed loop mode
Cardinal principle is: vehicle-mounted microcomputer be take the actual diesel engine rotating speed as feedback formation Control loop, and the EFI controller is implemented to closed loop control.Under any circumstance, the pwm signal in this Control loop is all dynamic, and its pulsewidth depends on the output of PID regulator.
Two kinds of above-mentioned patterns, " normal mode " exists that control accuracy is low, cumulative error is large, be subject to the shortcoming such as device aging impact; " closed loop mode " can make up the shortcoming of " normal mode ", but easily forms speed overshoot when one-way throttle moves.In addition, because " closed loop mode " control algorithm is comparatively complicated, " normal mode " is relatively simple and clear, locomotive operation personnel are more favor " normal mode " often.
Summary of the invention
In order to overcome the deficiency of existing technology, the invention provides a kind of diesel engine of diesel locomotive rotational speed setup signal scaling system and controlling method thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of diesel engine of diesel locomotive rotational speed setup signal scaling system, by the given signal scaling switch of diesel engine speed, minister of public works in ancient china device gear handle, vehicle-mounted microcomputer, the diesel engine speed regulation plate, the EFI controller, the diesel engine speed testing module forms, take vehicle-mounted microcomputer as control core, vehicle-mounted microcomputer is communicated with the diesel engine speed regulation plate by bus, and this diesel engine speed regulation plate is circumscribed with the EFI controller, vehicle-mounted microcomputer by rigid line respectively with minister of public works in ancient china device gear handle, the diesel engine speed testing module is communicated with, described vehicle-mounted microcomputer separately is connected with the given signal scaling switch of diesel engine speed by rigid line.
A kind of controlling method of diesel engine of diesel locomotive rotational speed setup signal scaling system, its process is as follows:
A. system power-up initializing;
B. check and whether have gear-the pulsewidth relation table, if do not exist, enter process c; If have gear-pulsewidth relation table, directly enter process d;
C. generate gear-pulsewidth relation table, gear-pulsewidth relation table is stored in the EPROM of vehicle-mounted microcomputer;
D. gather the diesel engine speed signal, gather given signal scaling switch 1 contact signal of diesel engine speed and controller gear handle 2 contact signals;
E. gear judgement;
F. table look-up and judge the calibration switch position;
G. whether enter Control loop according to the determining positions of the given signal scaling switch of diesel engine speed, if do not enter Control loop, System Implementation is conventional controls, and enters process h; If enter Control loop, enter process j;
H. system is written into gear-pulsewidth relation table;
I. according to the PWM pulsewidth that gear-pulsewidth relation table computation of table lookup gear is corresponding, enter process o;
J. after entering Control loop, take the diesel engine rotating speed of target as setting value, the current rotating speed of the diesel engine of take carries out closed loop PID calculating as value of feedback;
K. determine whether implement to demarcate according to the given signal scaling of the diesel engine speed switching position, when switch is positioned at " demarcation " position, system enters " calibration mode ";
L. calculate diesel engine speed signal discrete degree, judge that whether it is stable;
If m. stable enforcement of diesel engine speed demarcated, otherwise do not implement to demarcate;
N. calculate the average of nearest ten PWM output pulse widths, take this average as the corresponding pulsewidth of gear, upgrade the corresponding table of gear-pulsewidth to complete demarcation;
O. export the PWM ripple of corresponding pulsewidth according to the result of calculation of routine control or closed loop control.
The invention has the beneficial effects as follows, by introducing " calibration mode ", the control accuracy that makes up " normal mode " is low, cumulative error large, be subject to the shortcoming such as device aging impact, the speed overshoot of simultaneously avoiding the one-way throttle " closed loop mode " under to move.Meet to greatest extent the locomotive operation personnel demand on the basis of realizing the accurate speed governing of combustion motor car diesel engine.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of system of the present invention;
Fig. 2 is each connection diagram between electric of the present invention;
Fig. 3 is program flow diagram of the present invention;
In figure 1, the given signal scaling switch of diesel engine speed, 2, minister of public works in ancient china device gear handle, 3, vehicle-mounted microcomputer, 4, the diesel engine speed regulation plate, 5, the EFI controller, 6, the diesel engine speed testing module, 7, diesel engine, 11, contact one, 12, contact two.
Embodiment
As Fig. 1 is structural representation of the present invention, a kind of diesel engine of diesel locomotive rotational speed setup signal scaling system, by the given signal scaling switch 1 of diesel engine speed, minister of public works in ancient china device gear handle 2, vehicle-mounted microcomputer 3, diesel engine speed regulation plate 4, EFI controller 5, diesel engine speed testing module 6 forms, take vehicle-mounted microcomputer 3 as control core, vehicle-mounted microcomputer 3 is communicated with diesel engine speed regulation plate 4 by bus, and this diesel engine speed regulation plate 4 is circumscribed with EFI controller 5, vehicle-mounted microcomputer 3 by rigid line respectively with minister of public works in ancient china device gear handle 2, diesel engine speed testing module 6 is communicated with, described vehicle-mounted microcomputer 3 separately is connected with the given signal scaling switch 1 of diesel engine speed by rigid line.Described " the given signal scaling switch of diesel engine speed " is exactly in fact that ten thousand turn-ofves close, and this switch has two groups of contacts, 4 kinds of on-off states that can be as shown in table 1 to the microcomputer import and export.Vehicle-mounted microcomputer judges the position of this switch, controls whole system and switches between " normal mode ", " closed loop mode ", " calibration mode ".
Conventional control of " normal mode " lower System Implementation." closed loop mode " and " calibration mode " system all will enter Control loop, and difference is that the former has increased the process of automatic renewal " the corresponding table of gear-pulsewidth ", process l, m, n are arranged, and the latter has skipped these processes.
The groundwork principle of each parts is as follows: controller gear handle 2 is for given diesel engine target gear.Vehicle-mounted microcomputer 3 is for coordinating the work of whole system, it detects the information such as given signal scaling switch 1 state of diesel engine speed, controller handle 1 signal condition, the current PWM ripple of diesel engine speed regulation plate 4 output state, diesel engine 7 current actual speed, realizes the conversion of system between " normal mode ", " closed loop mode ", " calibration mode ".Diesel engine speed regulation plate 4, according to the pulsewidth instruction of vehicle-mounted microcomputer, is exported the PWM ripple.The effect of EFI controller 5 is after receiving the PWM ripple that the diesel engine speed regulation plate sends, and adjusts diesel engine to corresponding rotating speed.Diesel engine speed testing module 6 is for providing the feedback quantity of closed loop control to vehicle-mounted microcomputer.The degree of accuracy (precision) of 1 pair of given signal of diesel engine speed of the given signal scaling switch of diesel engine speed is detected whether meet standard.
In Fig. 2, the given signal scaling switch 1 of module diesel engine speed has contact 1 and contact, 2 12 two of contacts, can export 4 kinds of states i.e. " 0 ", " routine ", " closed loop ", " demarcation ".Its corresponding relation can be in Table the given signal scaling switch of 1 diesel engine speed close timepiece.
The given signal scaling switch of table 1 diesel engine speed close timepiece
(annotate: 0 represents that contact disconnects, and 1 represents make contact)
When line maintenance and plant maintenance, switch is in " 0 " position, and now contact 1, contact 2 all disconnect.
When locomotive normally uses, the driver should select " routine " position.When the given signal scaling switch 1 of diesel engine speed in " routine " when position, contact 1 closure, contact 2 disconnects, now system is in " normal mode ", 3 pairs of diesel engine EFI controllers of vehicle-mounted microcomputer 5 are implemented conventional control, i.e. open loop is controlled.Vehicle-mounted microcomputer 3 sends the pwm signal of certain pulsewidth to EFI controller 5 according to gear-pulsewidth corresponding relation, its pulsewidth is corresponding with the current gear of controller.
If have relatively large deviation between the diesel engine speed desired value under " normal mode " lower diesel engine speed and this gear, operator need to implement to demarcate to the given signal of diesel engine speed, now the given signal scaling switch 1 of diesel engine speed is pushed to " demarcation " position, contact 1, contact 2 be closure all, and system is in " calibration mode ".Calibration process is as follows: 3 pairs of diesel engine EFI controllers of vehicle-mounted microcomputer 5 are implemented closed loop control, and the result of calculating according to closed loop PID is exported the PWM ripples to EFI controller 5, and judges diesel engine speed simultaneously.After diesel engine speed is stable, vehicle-mounted microcomputer 3 calculates the now PWM pulsewidth of actual output, and upgrades gear-pulsewidth relation, generates the corresponding table of new gear-pulsewidth and uses for " normal mode ".After completing demarcation, switch can be reversed to " routine " position, vehicle-mounted microcomputer 3 will send the PWM ripple with the corresponding pulsewidth of the current gear of controller to EFI controller 5 according to new gear-pulsewidth mapping table.After carrying out calibration process like this, can be calibrated the given signal of diesel engine speed, and then be improved the control accuracy under " normal mode ".
" closed loop " position is between " routine " position and " demarcation " position.When switch, in " closed loop " when position, contact 1 disconnects, contact 2 closures, and now system is in " closed loop mode ", and 3 pairs of diesel engine EFI controllers of vehicle-mounted microcomputer 5 are implemented closed loop controls, but do not implement to demarcate.
Under normal conditions, to the control of diesel engine, can adopt " normal mode ", this pattern control accuracy is low, cumulative error large, be subject to the device aging impact, but does not have speed overshoot; Control to diesel engine also can adopt " closed loop mode ", and this pattern precision is high, but there is speed overshoot exactly in corresponding shortcoming." calibration mode " combines both advantages.For the locomotive that has adopted patent of the present invention, the mode of operation of recommending is " normal mode ", if have relatively large deviation between the actual speed of driver when " normal mode " lower discovery diesel engine stable operation and the rotating speed of target under current gear, the driver stirs " the given signal scaling switch of diesel engine speed " and arrives " demarcating position ", system result of calculation according to Control loop under " calibration mode " is upgraded " the corresponding table of gear-pulsewidth " automatically, then the driver can reverse switch " conventional position ", system will be implemented open loop to diesel engine speed according to new " the corresponding table of gear-pulsewidth " and control, note, the driver can frequently not implement this operation.Certainly, also not forbidding that the driver pushes switch " closed loop position ", will be now pure closed loop control to the control of system, although there is overshoot in control now, for the driver, save trouble most.
As Fig. 3, its running is as follows:
A. system power-up initializing.
If b. system was never implemented demarcation, there do not is gear-pulsewidth relation table, need enter process c; Otherwise skip process c, directly enter process d.
C. generate gear as shown in table 2-pulsewidth relation table.This relation table is stored in the EPROM of vehicle-mounted microcomputer, can power down keep.
The corresponding table of the initial gear of table 2-pulsewidth
D. gather the diesel engine speed signal; Gather diesel engine speed given signal scaling switch contact signal and controller gear handle contact signal.
E. judge diesel engine target gear according to the gear handle make contact table shown in table 3, and calculate the diesel engine rotating speed of target that current gear is corresponding.
Table 3 gear handle make contact table
Annotate: 0 represents that contact disconnects, and 1 represents make contact
F. according to the given signal scaling switch of the diesel engine speed shown in table 1 close timepiece judgement calibration switch position.
G. whether enter Control loop according to the determining positions of the given signal scaling switch of diesel engine speed: when switch is positioned at " 0 " position or " routine " position, System Implementation is conventional to be controlled, and enters process h; When switch is positioned at " closed loop " position or " demarcation " position, system enters Control loop, enters process j.
While h. implementing conventional control, vehicle-mounted microcomputer is written into the gear that obtained by process c or process n-pulsewidth relation table.
I. according to the PWM pulsewidth that gear-pulsewidth relation table computation of table lookup gear is corresponding, enter process o.
J. after system enters Control loop, take the diesel engine rotating speed of target as setting value, the current rotating speed of the diesel engine of take carries out closed loop PID calculating as value of feedback.
K. determine whether implement to demarcate according to the given signal scaling of the diesel engine speed switching position, when switch is positioned at " closed loop " position, skip process l, m, n, directly enter process o; When switch is positioned at " demarcation " position, system enters " calibration mode ", enters process l.
L. calculate diesel engine speed signal discrete degree, judge that whether it is stable.
If m. stable enforcement of diesel engine speed demarcated, otherwise do not implement to demarcate.
N. calculate the average of nearest ten PWM output pulse widths, take this average as the corresponding pulsewidth of gear, upgrade the corresponding table of gear-pulsewidth to complete demarcation.
O. export the PWM ripple of corresponding pulsewidth according to the result of calculation of routine control or closed loop control.
After carrying out calibration process like this, can be calibrated the given signal of diesel engine speed, and then be improved the control accuracy under " normal mode ".
The present invention is by introducing " calibration mode ", the control accuracy that can make up on the one hand " normal mode " is low, cumulative error large, be subject to the shortcoming such as device aging impact, the speed overshoot that can simultaneously avoid on the other hand the one-way throttle " closed loop mode " under to move.Meet to greatest extent the locomotive operation personnel demand on the basis of realizing the accurate speed governing of combustion motor car diesel engine.
Claims (3)
1. a diesel engine of diesel locomotive rotational speed setup signal scaling system, by the given signal scaling switch of diesel engine speed (1), minister of public works in ancient china device gear handle (2), vehicle-mounted microcomputer (3), diesel engine speed regulation plate (4), EFI controller (5), diesel engine speed testing module (6) forms, the vehicle-mounted microcomputer (3) of take is control core, vehicle-mounted microcomputer (3) is communicated with diesel engine speed regulation plate (4) by bus, and this diesel engine speed regulation plate (4) is circumscribed with EFI controller (5), vehicle-mounted microcomputer (3) by rigid line respectively with minister of public works in ancient china device gear handle (2), diesel engine speed testing module (6) is communicated with, it is characterized in that, described vehicle-mounted microcomputer (3) separately is connected with the given signal scaling switch of diesel engine speed (1) by rigid line.
2. a diesel engine of diesel locomotive rotational speed setup signal scaling system, is characterized in that, the given signal scaling switch of described diesel engine speed (1) is provided with contact one (11), contact, two (12) two of contacts.
3. the controlling method of diesel engine of diesel locomotive rotational speed setup signal scaling system according to claim 1, is characterized in that, its process is as follows:
A. system power-up initializing;
B. check and whether have gear-the pulsewidth relation table, if do not exist, enter process c; If exist, directly enter process d;
C. generate gear-pulsewidth relation table, gear-pulsewidth relation table is stored in the EPROM of vehicle-mounted microcomputer;
D. gather the diesel engine speed signal, gather given signal scaling switch (1) contact signal of diesel engine speed and controller gear handle (2) contact signal;
E. gear judgement;
F. table look-up and judge the calibration switch position;
G. whether enter Control loop according to the determining positions of the given signal scaling switch of diesel engine speed, if do not enter Control loop, System Implementation is conventional controls, and enters process h; If enter Control loop, enter process j;
H. system is written into gear-pulsewidth relation table;
I. according to the PWM pulsewidth that gear-pulsewidth relation table computation of table lookup gear is corresponding, enter process o;
J. after entering Control loop, take the diesel engine rotating speed of target as setting value, the current rotating speed of the diesel engine of take carries out closed loop PID calculating as value of feedback;
K. determine whether implement to demarcate according to the given signal scaling of the diesel engine speed switching position (1), when switch is positioned at " demarcation " position, system enters " calibration mode ";
L. calculate diesel engine speed signal discrete degree, judge that whether it is stable;
If m. stable enforcement of diesel engine speed demarcated, otherwise do not implement to demarcate;
N. calculate the average of nearest ten PWM output pulse widths, take this average as the corresponding pulsewidth of gear, upgrade the corresponding table of gear-pulsewidth to complete demarcation;
O. export the PWM ripple of corresponding pulsewidth according to the result of calculation of routine control or closed loop control.
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| CN107387250A (en) * | 2017-08-08 | 2017-11-24 | 中车大连机车车辆有限公司 | The machine of diesel locomotive three joins diesel speed control method again |
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