CN102225735B - Feedback compensation type brake control scheme with adaptive function - Google Patents
Feedback compensation type brake control scheme with adaptive function Download PDFInfo
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- CN102225735B CN102225735B CN201110108549.9A CN201110108549A CN102225735B CN 102225735 B CN102225735 B CN 102225735B CN 201110108549 A CN201110108549 A CN 201110108549A CN 102225735 B CN102225735 B CN 102225735B
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Abstract
The invention discloses a feedback compensation type brake control scheme with an adaptive function. The scheme comprises: A, when brake is required, a hydraulic control system opens an electric control switch valve at a low-pressure oil-way end, and the current of an electric proportional overflow valve is controlled in a feedback mode, so that the system achieves set low pressure to brake, and an adaptive controller regulates the early brake point and brake pressure of next brake on the basis of a determination result of the previous ramming brake effect so as to realize adaptive control; and B, the hydraulic control system opens a general electric control valve of a brake hydraulic system when the brake is required to be released, the whole oil path achieves high pressure through an overflow valve which is set to be in a high-pressure state, and the brake is completely released. In the feedback compensation type brake control scheme, the hydraulic control system controls the electric proportional overflow valve in a closed loop control mode, the hydraulic system errors generated by temperature changes and component differences can be well compensated, the intelligent degree is high, the universality is achieved, and the operation is easy and convenient.
Description
Technical field
The present invention relates to a kind of brake control scheme, relate in particular to a kind of feedback compensation type brake control scheme with adaptation function that is applied to the free off the hook elevator of dynamic compaction machinery.
Background technology
The mode that common dynamic compaction machinery generally adopts in hammer ram dropping process in the market has two kinds of disconnecting type and free off the hook formulas, wherein disconnecting type is that hammer ram falls separately after departing from hook by trip mechanism in dropping process, which is relatively simple, tamping energy degree of utilization is high, but because needs repeat hook, need to be equipped with more operating personal, too much rely on manpower to cause the whole work efficiency of ramming operation to reduce.Comparatively advanced is a kind of mode of so-called free off the hook, be that in dropping process, hammer ram does not depart from but drives together with whole steel rope and hoisting mechanism with hook and moves, which can be mentioned in the short period of time on carrying out and once rams after hammer ram lands, greatly improve the work efficiency of ramming operation, reduced the outfit quantity of operating personal simultaneously.But which is for control system in practical operation, and particularly the control system of elevator brake is had relatively high expectations: braking too early exists the major hidden danger that aerial braking, fatal crass occur, and crosses braking in evening and has that steel rope is put, the problem of elevator disorder cable more.The normal mode adopting has three kinds at present: (1) operating personal is manually controlled brake based on hammer ram height; (2) the fixing brake point of manufacturer and brake-pressure; (3) electron controls technology based on open loop approach.First kind of way too relies on operating personal individual judgement, and the stability of control is not strong, and the repeatability of operation is not high; First scheme needs producer to demarcate separately for every equipment, and not only work capacity is large but also mode is not had a commonality, and usage is single; The third scheme is based on electron controls technology, in time send brake control signal by calculating hammer ram height of drop, this scheme has higher commonality, can ram height for difference, different hammer ram weight adjusts, but can not provide indemnifying measure targetedly for the hydraulic pressure error that temperature traverse and components and parts difference cause.
Summary of the invention
For the problem of above-mentioned existence, the object of this invention is to provide a kind of feedback compensation type brake control scheme with adaptation function, do not need too many manpower, control stiffness is good, operation is repeatable high, effectively compensate the hydraulic efficiency pressure system error causing due to temperature traverse and components and parts difference, there is commonality.
The object of the invention is to be achieved through the following technical solutions:
There is a feedback compensation type brake control scheme for adaptation function, wherein, comprising:
A, in the time that needs brake, hydraulic control system is opened low pressure oil terminal electric-controlled switch valve, simultaneously with feedback system control electricity proportional pressure control valve size of current, makes low pressure that system reaches setting to realize brake; In advance braking point and the brake-pressure size of adaptive controller based on the front result of determination of once ramming braking effect being adjusted to brake next time, realizes adaptive control;
B, when needs discharge when brake, hydraulic control system is opened brake hydraulic system electronic control main valve, makes whole oil circuit reach high pressure by being set as the by pass valve of high pressure, brake discharges completely.
The above-mentioned feedback compensation type brake control scheme with adaptation function, wherein, described self adaptation feedback system specifically comprises:
Search out that time of the hammer ram kiss the earth of expectation by analyzing elevator angular encoder numerical value, whether the distance of judging braking in advance according to this moment brake system pressure is applicable to: do not reach brake pressure setting value and strengthen lead, reach too early pressure set points and reduce lead; And,
The length that has more rope according to elevator is judged the size of brake pressure setting value: rope stretching amount is crossed and reduced at most brake pressure setting value to improve brake weight, and rope stretching amount is crossed increases brake pressure setting value at least to reduce brake weight.
The above-mentioned feedback compensation type brake control scheme with adaptation function, wherein, in described self adaptation feedback system, described actual pressure is obtained after digital filter feedback by pressure sensor, the difference of itself and described brake pressure setting value is exported after pid algorithm, is used for controlling electric current and regulates electric proportional overflow valve opening.
The above-mentioned feedback compensation type brake control scheme with adaptation function, wherein, described brake pressure setting value is provided by adaptive controller.
The above-mentioned feedback compensation type brake control scheme with adaptation function, wherein, the equipment of realizing this scheme comprises a hydraulic control system, described hydraulic control system adopts high-pressure oil passage and low pressure oil way two-stage pressure oil circuit, described high-pressure oil passage pressure is by by pass valve control, described low pressure oil way pressure is by electric proportional pressure control valve control, before described electric proportional pressure control valve, be provided with electric-controlled switch valve be used for oil circuit control switch, in described hydraulic control system, be also provided with electronic control main valve, be used for opening or close water brake control system, described water brake control system also comprises the pressure sensor being located in water brake oil circuit, described electric-controlled switch valve after connecting with described electric proportional pressure control valve respectively with described electronic control main valve, described by pass valve parallel connection, connect with described pressure sensor more afterwards.
Compared with the prior art, beneficial effect of the present invention is:
(1) in the present invention, hydraulic control system is controlled electric proportional pressure control valve in the mode of closed loop control, not only improve the response time of hydraulic efficiency pressure system, and the hydraulic efficiency pressure system error producing due to temperature traverse and components and parts difference has also been had to good compensating action;
(2) the adaptive control mode proposing in the present invention can be made self adaptation adjustment to the dynamic compaction machinery of extreme environment in the short period of time, and intelligent degree is high, has commonality, easy and simple to handle comfortable.
Brief description of the drawings
Fig. 1 is the self adaptation feedback system schematic diagram of the present invention's feedback compensation type brake control scheme with adaptation function;
Fig. 2 is the structural representation that the present invention has the hydraulic control system of the feedback compensation type brake control scheme of adaptation function.
Detailed description of the invention
Below in conjunction with schematic diagram and concrete operations embodiment, the invention will be further described.
The feedback compensation type brake control scheme that the present invention has adaptation function comprises: A, in the time that needs brake, hydraulic control system is opened low pressure oil terminal electric-controlled switch valve, simultaneously with feedback system control electricity proportional pressure control valve size of current, the low pressure that makes system reach setting is braked to realize, wherein, in advance braking point and the brake-pressure size of adaptive controller based on the front result of determination of once ramming braking effect being adjusted to brake next time, realizes adaptive control; B, when needs discharge when brake, hydraulic control system is opened brake hydraulic system electronic control main valve, makes whole oil circuit reach high pressure by being set as the by pass valve of high pressure, brake discharges completely.Please refer to shown in Fig. 1, self adaptation feedback system specifically comprises: that time that searches out the hammer ram kiss the earth of expectation by analyzing elevator angular encoder numerical value, whether the distance of judging braking in advance according to this moment brake system pressure is applicable to: do not reach brake pressure setting value and strengthen lead, reach too early pressure set points and reduce lead; The length that has more rope according to elevator is judged the size of brake pressure setting value: rope stretching amount is crossed and reduced at most brake pressure setting value to improve brake weight, and rope stretching amount is crossed increases brake pressure setting value at least to reduce brake weight, and whole process is by a controller control.Actual pressure is obtained after digital filter (DF) feedback by pressure sensor, and the difference of itself and brake pressure setting value is exported after pid algorithm, is used for controlling electric current and regulates electric proportional overflow valve opening.
Further, the equipment of realizing this scheme specifically comprises a hydraulic control system, structural representation as shown in Figure 2, hydraulic control system adopts high-pressure oil passage and low pressure oil way two-stage pressure oil circuit, high-pressure oil passage is mainly used in discharging brake process, its pressure is controlled by by pass valve 2, low pressure oil way is mainly used in brake process, its pressure is controlled by electric proportional pressure control valve 4, electricity is provided with electric-controlled switch valve 3 before proportional pressure control valve 4 and is used for oil circuit control and switches, in hydraulic control system, be also provided with electronic control main valve 1, be used for opening or close water brake control system, water brake control system also comprises the pressure sensor 5 being located in water brake oil circuit, electric-controlled switch valve 3 after connecting with electric proportional pressure control valve 4 respectively with electronic control main valve 1, by pass valve 2 parallel connections, connect with pressure sensor 5 more afterwards.
In sum, the feedback compensation type brake control scheme that the present invention has adaptation function regulates system pressure in the mode of closed loop control, effectively compensate the hydraulic efficiency pressure system error causing due to temperature traverse and components and parts difference, control stiffness is good, operation is repeatable high, has commonality.
Above specific embodiments of the invention be have been described in detail, but the present invention is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any equivalent modifications that this feedback compensation type brake control scheme with adaptation function is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the amendment done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (4)
1. a feedback compensation type brake control method with adaptation function, is characterized in that, comprising:
A, in the time that needs brake, hydraulic control system is opened low pressure oil terminal electric-controlled switch valve, simultaneously with feedback system control electricity proportional pressure control valve size of current, makes low pressure that system reaches setting to realize brake; In advance braking point and the brake pressure size of adaptive controller based on the front result of determination of once ramming braking effect being adjusted to brake next time, realizes adaptive control;
B, when needs discharge when brake, hydraulic control system is opened and is controlled hydraulic efficiency pressure system electronic control main valve, makes whole oil circuit reach high pressure by being set as the by pass valve of high pressure, brake discharges completely;
Described feedback system specifically comprises:
Search out that time of the hammer ram kiss the earth of expectation by analyzing elevator angular encoder numerical value, whether the distance of judging brake in advance according to this moment hydraulic control system pressure is applicable to: do not reach brake pressure setting value and strengthen lead, reach too early pressure set points and reduce lead; And,
The length that has more rope according to elevator is judged the size of brake pressure setting value: rope stretching amount is crossed and reduced at most brake pressure setting value to improve brake pressure, and rope stretching amount is crossed increases brake pressure setting value at least to reduce brake pressure.
2. the feedback compensation type brake control method with adaptation function according to claim 1, it is characterized in that, in described feedback system, the actual value of described brake pressure is obtained after digital filter feedback by pressure sensor, the difference of itself and described brake pressure setting value is exported after pid algorithm, is used for controlling electric current and regulates electric proportional overflow valve opening.
3. the feedback compensation type brake control method with adaptation function according to claim 1, is characterized in that, described brake pressure setting value is provided by adaptive controller.
4. the feedback compensation type brake control method with adaptation function according to claim 1, it is characterized in that, the equipment of realizing the method comprises a hydraulic control system, described hydraulic control system adopts high-pressure oil passage and low pressure oil way two-stage pressure oil circuit, described high-pressure oil passage pressure is by by pass valve control, described low pressure oil way pressure is by electric proportional pressure control valve control, before described electric proportional pressure control valve, be provided with electric-controlled switch valve be used for oil circuit control switch, in described hydraulic control system, be also provided with electronic control main valve, be used for opening or close described hydraulic control system, described hydraulic control system also comprises the pressure sensor being located in water brake oil circuit, described electric-controlled switch valve after connecting with described electric proportional pressure control valve respectively with described electronic control main valve, described by pass valve parallel connection, connect with described pressure sensor more afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110108549.9A CN102225735B (en) | 2011-04-28 | 2011-04-28 | Feedback compensation type brake control scheme with adaptive function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110108549.9A CN102225735B (en) | 2011-04-28 | 2011-04-28 | Feedback compensation type brake control scheme with adaptive function |
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| CN102225735A CN102225735A (en) | 2011-10-26 |
| CN102225735B true CN102225735B (en) | 2014-07-23 |
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| CN103423222B (en) * | 2012-05-17 | 2015-12-16 | 徐工集团工程机械股份有限公司 | Ratio pressure combined control valve, hydraulic system and system pressure switching method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3204695A1 (en) * | 1982-02-11 | 1983-08-18 | Siemens AG, 1000 Berlin und 8000 München | Device for the safety braking of hoists, in particular drum-type hoists |
| CN87209876U (en) * | 1987-07-08 | 1988-06-01 | 马炳林 | Hydraulic tamping machine |
| CN2576797Y (en) * | 2002-10-23 | 2003-10-01 | 山东省泰安市装载机厂 | Impact-rammer boosted hydraulic device |
| CN1587644A (en) * | 2004-07-09 | 2005-03-02 | 浙江大学 | Full power self adaptive shield cutter disc driving electrohydraulic control system |
| CN201228693Y (en) * | 2008-05-30 | 2009-04-29 | 浙江大学 | Adaptation type hydraulic system of closed-loop control load for computer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030280B (en) * | 2010-11-08 | 2013-02-27 | 中信重工机械股份有限公司 | Mine-hoist constant deceleration safety braking system and braking method thereof |
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2011
- 2011-04-28 CN CN201110108549.9A patent/CN102225735B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3204695A1 (en) * | 1982-02-11 | 1983-08-18 | Siemens AG, 1000 Berlin und 8000 München | Device for the safety braking of hoists, in particular drum-type hoists |
| CN87209876U (en) * | 1987-07-08 | 1988-06-01 | 马炳林 | Hydraulic tamping machine |
| CN2576797Y (en) * | 2002-10-23 | 2003-10-01 | 山东省泰安市装载机厂 | Impact-rammer boosted hydraulic device |
| CN1587644A (en) * | 2004-07-09 | 2005-03-02 | 浙江大学 | Full power self adaptive shield cutter disc driving electrohydraulic control system |
| CN201228693Y (en) * | 2008-05-30 | 2009-04-29 | 浙江大学 | Adaptation type hydraulic system of closed-loop control load for computer |
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Effective date of registration: 20160219 Address after: Eight in the 313028 Zhejiang city of Huzhou province Cao Zhen Village daily standard factory Auxiliary Building No. 2 Patentee after: Zhejiang Sany Equipment Co., Ltd. Address before: 201202, room 6999, 205 Chuansha Road, Shanghai, Pudong New Area Patentee before: Shanghai Sany Technology Co., Ltd. |
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Granted publication date: 20140723 Termination date: 20160428 |