CN102167027A - Fault-tolerant control system based on line control brake - Google Patents
Fault-tolerant control system based on line control brake Download PDFInfo
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- CN102167027A CN102167027A CN201010609022XA CN201010609022A CN102167027A CN 102167027 A CN102167027 A CN 102167027A CN 201010609022X A CN201010609022X A CN 201010609022XA CN 201010609022 A CN201010609022 A CN 201010609022A CN 102167027 A CN102167027 A CN 102167027A
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Abstract
The invention relates to a fault-tolerant control system which comprises a main MCU (Microprogrammed Control Unit), a slave MCU and a switching control device, wherein the main MCU is connected with the switching control device, the slave MCU is connected with the switching control device, and the switching control device is used for switching a power supply between the main MCU and the slave MCU when the main MCU has a fault. When the main MCU has a fault, the power supply is switched to the slave MCU, and the slave MCU is used for controlling a vehicle brake system, therefore, the fault-tolerant function of a linear control brake system is realized and the safety, and the reliability of vehicles are improved.
Description
Technical field
The present invention relates to the brake-by-wire technical field, relate in particular to a kind of fault-tolerant control system based on brake-by-wire
Background technology
The brake piping length of traditional braking system, complicated in mechanical structure, valve are of a great variety, especially long or have for the vehicle of trailer for wheelbase, it has long braking transmission route, in braking maneuver, often produce braking retardation phenomenons such as delay of response, reduced the safety performance of vehicle, and the cost of brake system is higher.
Along with the raising that vehicle braking performances is required, joint line control techniques and brake system have formed line control brake system (Brake-By-Wire), line control brake system is by EMB (Electromechanical Brake, the electric mechanical braking device) vehicle is braked, adopt direct motor drive to substitute traditional hydraulic-driven or compressed air-driven part in the concrete EMB system, and the EMB system is controlled by electronic control unit.
For traditional brake system, the EMB system has improved the speed of response of braking, has increased brake efficiency, has simplified the structure, reduced simultaneously the difficulty of I﹠ M greatly.
The contriver is in realizing process of the present invention, find that there is following defective in prior art: in the moving system of On-line Control, ECU controls by control chip, because the working environment complexity of brake system, in case ECU breaks down, ECU can't brake vehicle, and the safety and the reliability of vehicle lose guarantee.
Summary of the invention
The object of the present invention is to provide a kind of fault-tolerant control system based on brake-by-wire, when main MCU breaks down, switch to from MCU, and by from MCU motor vehicle braking system being controlled, realize the fault tolerance of line control brake system, improved the safety and the reliability of vehicle.
In order to achieve the above object, the present invention proposes a kind of fault-tolerant control system, comprise main MCU, from MCU and switching control, described main MCU is connected with described switching control, describedly be connected with described switching control from MCU, described switching control is used for when main MCU breaks down, and switches main MCU and from the power supply between the MCU.
Further, described switching control is a relay.
Further, described relay is a time relay.
Further, described relay comprises open contact and normally closed contact, and normally closed contact is connected with described main MCU, and open contact is connected from MCU with described.
Whether further, also comprise detection module, described detection is connected with described main MCU, be used to detect described main MCU and break down.
Further, described detection module is a watchdog circuit.
Further, also comprise processing module, it is connected with described detection module with described relay, is used for when described detection module detects described main MCU and breaks down, and controls described relay normally closed contact and disconnects, and controls described relay normally open contact closure.
Further, also comprise alarm module, it is connected with described processing module, is used for sending corresponding warning information when described main MCU breaks down.
Further, main MCU and be the MCU of same alike result from MCU perhaps is the MCU of different attribute.
Compared with prior art, when the present invention was broken down at main MCU, brake system had realized the fault tolerance of line control brake system still can realize vehicle braked under the control of MCU, had improved the safety and the reliability of vehicle.
Description of drawings
Fig. 1 is the structural representation of a kind of fault-tolerant control system of the present invention's proposition.
Fig. 2 is the circuit connection diagram of a kind of fault-tolerant control system of the present invention's proposition.
The specific embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
With reference to Fig. 1,2, present embodiment has proposed a kind of fault-tolerant control system, and described system comprises main MCU, from MCU and relay, and described relay is connected from MCU with described with described main MCU respectively.The normally closed contact of described relay is connected with described main MCU, and the open contact of described relay is connected from MCU with described.At this moment, main MCU is in mode of operation, is in dormant state from MCU.Whether described system also comprises detection module, and described detection module is connected with described main MCU, be used to detect described main MCU and break down.Described detection module is a watchdog circuit.
Described system also comprises processing module, described processing module is connected with described detection module with described relay, be used for when described detection module detects described main MCU and breaks down, control described relay normally closed contact and disconnect, control described relay normally open contact closure.At this moment, main MCU is in dormant state, is in mode of operation from MCU.
Described relay is a time relay.
Described system also comprises alarm module, and described alarm module is connected with described detection module, is used for sending corresponding warning information when described detection module detects described main MCU and breaks down.
Need to prove, in the real-time example of present embodiment, described main MCU with described be identical MCU from MCU, perhaps be different MCU.
When described main MCU with described when MCU is identical MCU, when main MCU breaks down, can realize the repertoire of main MCU from MCU; Perhaps in order to save cost, when main MCU breaks down, when MCU controls as Auxiliary Control Element, can be provided with from the MCU grade and be lower than main MCU, realize the partial function of main MCU.
As Fig. 1, shown in 2, main MCU be connected with relay from MCU, concrete, main MCU is connected the normally closed contact 1,2 of relay, is connected the open contact 3,4 of relay from MCU.Under system's normal operation, the main MCU under normally closed contact 1,2 connects is in mode of operation, and open contact 3,4 not electric, promptly be in dormant state from MCU.Watchdog circuit is connected with main MCU, and be used to detect main MCU and whether break down,
Described processing module specifically is used for, when described main MCU breaks down, control main MCU output high level signal to relay coil, relay coil obtains conducting, and relay normally closed contact 1,2 disconnects open contact 3,4 closures, at this moment, main MCU and control system disconnect, and are connected to control system from MCU, have realized main MCU and from the switching between the MCU.In the present embodiment, in the process of switching, fail supply regular power from MCU when main MCU outage between principal and subordinate MCU, therefore, described relay adopts time relay, makes to be connected the system from MCU under situation about not starting from MCU.In main MCU outage and when MCU failed supply regular power, relay kept normal 3, the 4 closed a period of times of making war, time relay makes and is connected the system from MCU.After starting, to relay coil, guarantee the closure of normal battle 3,4 from MCU output high level signal from MCU.In addition, when main MCU broke down, the control light-emitting diode was lighted, and carries out warning function.The fault-tolerant control system of present embodiment when main MCU breaks down, switches to from MCU, and by from MCU motor vehicle braking system being controlled, has realized the fault tolerance of line control brake system, has improved the safety and the reliability of vehicle.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (10)
1. the fault-tolerant control system based on brake-by-wire is characterized in that, comprises main MCU, from MCU and relay, described main MCU connects described relay, describedly connects described relay from MCU, described relay is used for when main MCU fault, switches main MCU and from the power supply between the MCU.
2. the fault-tolerant control system based on brake-by-wire as claimed in claim 1 is characterized in that, described main MCU be connected from MCU and the control brake system, described relay is a time relay.
3. the fault-tolerant control system based on brake-by-wire as claimed in claim 1 or 2 is characterized in that described relay comprises open contact and normally closed contact, and normally closed contact is connected with described main MCU, and open contact is connected from MCU with described.
4. as each described fault-tolerant control system among the claim 1-3, it is characterized in that also comprise a detection module, it is connected with described main MCU, is used to detect described main MCU and whether breaks down based on brake-by-wire.
5. the fault-tolerant control system based on brake-by-wire as claimed in claim 4 is characterized in that, described detection module is a watchdog circuit.
6. as each described fault-tolerant control system among the claim 1-5 based on brake-by-wire, it is characterized in that, also comprise processing module, it is connected with described detection module with described relay, be used for when described detection module detects described main MCU and breaks down, control described relay normally closed contact and disconnect, control described relay normally open contact closure.
7. as each described fault-tolerant control system among the claim 1-6 based on brake-by-wire, it is characterized in that, also comprise alarm module, it is connected with described detection module, be used for when described detection module detects described main MCU and breaks down, sending corresponding warning information.
8. as each described fault-tolerant control system among the claim 1-7, it is characterized in that based on brake-by-wire, main MCU be identical MCU from MCU, perhaps be different MCU.
9. as the control method of fault-tolerant control system as described in the claim 1-8, it is characterized in that, adopt following steps:
When (1) described main MCU broke down, processing module was controlled main MCU output high level signal to relay coil;
(2) relay coil conducting;
(3) the relay normally closed contact disconnects, the open contact closure;
(4) main MCU and control system disconnect, and are connected to control system from MCU, realize main MCU and from the switching between the MCU.
10. as the control method of fault-tolerant control system as described in the claim 9, it is characterized in that further, when main MCU broke down, the control light-emitting diode was lighted, and carries out warning function in the step (1); Step (2), (3) in further, main MCU outage and when MCU fails supply regular power, relay keeps normal and makes war closed a period of time, time relay makes and is connected the system from MCU, after starting, to relay coil, guarantee normal closure of making war from MCU output high level signal from MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010609022XA CN102167027A (en) | 2010-12-28 | 2010-12-28 | Fault-tolerant control system based on line control brake |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010609022XA CN102167027A (en) | 2010-12-28 | 2010-12-28 | Fault-tolerant control system based on line control brake |
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| CN102167027A true CN102167027A (en) | 2011-08-31 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103072566A (en) * | 2011-10-26 | 2013-05-01 | 现代摩比斯株式会社 | Vehicle brake system failure protection method |
| CN103332185A (en) * | 2013-07-11 | 2013-10-02 | 上海理工大学 | Safety car line control brake system and control method thereof |
| CN104049530A (en) * | 2013-03-14 | 2014-09-17 | 通用汽车环球科技运作有限责任公司 | Fault tolerant control system |
| CN106671903A (en) * | 2016-12-21 | 2017-05-17 | 雷沃重工股份有限公司 | High-safety-performance ECU control system and method |
| CN111090235A (en) * | 2018-10-23 | 2020-05-01 | 株洲中车时代电气股份有限公司 | Control system switching device and method |
| CN111301393A (en) * | 2020-03-26 | 2020-06-19 | 东风柳州汽车有限公司 | Automobile man-machine driving mode-shared braking control system and control method |
| CN113085815A (en) * | 2021-03-31 | 2021-07-09 | 南京航空航天大学 | Digital twin-based line control brake system and dynamic optimization control method thereof |
| CN113110238A (en) * | 2021-05-12 | 2021-07-13 | 中国第一汽车股份有限公司 | EMB redundancy control system and method |
| CN114333282A (en) * | 2022-02-10 | 2022-04-12 | 上海集嘉同速汽车科技有限公司 | Pedal signal redundancy transmission device and control method |
| CN116022116A (en) * | 2022-10-30 | 2023-04-28 | 重庆长安汽车股份有限公司 | Vehicle brake control method and device, vehicle, electronic equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103072566A (en) * | 2011-10-26 | 2013-05-01 | 现代摩比斯株式会社 | Vehicle brake system failure protection method |
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| CN103332185B (en) * | 2013-07-11 | 2015-08-26 | 上海理工大学 | Safety automobile line control brake system and control method thereof |
| CN106671903A (en) * | 2016-12-21 | 2017-05-17 | 雷沃重工股份有限公司 | High-safety-performance ECU control system and method |
| CN111090235A (en) * | 2018-10-23 | 2020-05-01 | 株洲中车时代电气股份有限公司 | Control system switching device and method |
| CN111301393A (en) * | 2020-03-26 | 2020-06-19 | 东风柳州汽车有限公司 | Automobile man-machine driving mode-shared braking control system and control method |
| CN113085815A (en) * | 2021-03-31 | 2021-07-09 | 南京航空航天大学 | Digital twin-based line control brake system and dynamic optimization control method thereof |
| CN113085815B (en) * | 2021-03-31 | 2022-04-08 | 南京航空航天大学 | Digital twin-based line control brake system and dynamic optimization control method thereof |
| CN113110238A (en) * | 2021-05-12 | 2021-07-13 | 中国第一汽车股份有限公司 | EMB redundancy control system and method |
| CN114333282A (en) * | 2022-02-10 | 2022-04-12 | 上海集嘉同速汽车科技有限公司 | Pedal signal redundancy transmission device and control method |
| CN116022116A (en) * | 2022-10-30 | 2023-04-28 | 重庆长安汽车股份有限公司 | Vehicle brake control method and device, vehicle, electronic equipment and storage medium |
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Application publication date: 20110831 |