CN103407486B - A kind of Electric Power Steering Control System of Automobile - Google Patents

A kind of Electric Power Steering Control System of Automobile Download PDF

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Publication number
CN103407486B
CN103407486B CN201310350323.9A CN201310350323A CN103407486B CN 103407486 B CN103407486 B CN 103407486B CN 201310350323 A CN201310350323 A CN 201310350323A CN 103407486 B CN103407486 B CN 103407486B
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electric power
power steering
mcu
master controller
control device
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CN103407486A (en
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赵战伟
裴四海
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EAST JOY LONG AUTOMOBILE ELECTRONIC (SHANGHAI) Co.,Ltd.
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Oriental Long Automotive Electronics (shanghai) Co Ltd
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Abstract

A kind of Electric Power Steering Control System of Automobile disclosed by the invention, comprise: some sensors for transmitting automobile live signal, one for gathering the signal of described sensor and current of electric feedback signal and the electric power steering master controller MCU made a response, one first power supply chip of powering for described master controller MCU, one assist motor driving circuit, one assist motor, it is characterized in that, also comprise one completely independently for monitoring the described input and output of electric power steering master controller MCU and the electric power steering monitored control system of running state of programs thereof in real time.Owing to have employed technical scheme as above, beneficial effect of the present invention is: effectively prevent the traffic accident causing servo-steering control system non helping hand because controller lost efficacy or cause to the power-assisted made mistake; If monitored control system detects exception, monitoring system can disconnect power-assisted, makes vehicle return to pure mechanical steering in time, thus reaches the object substantially increasing whole system safe class.

Description

A kind of Electric Power Steering Control System of Automobile
Technical field
The present invention relates to a kind of Electric Power Steering Control System, belong to field of automobile electronic control, particularly relate to a kind of Electric Power Steering Control System of Automobile.
Background technology
In recent years, along with the increase gradually of automobile pollution, the traffic on road becomes more intricate, and the frequency of pilot control steering handwheel is constantly increased, and drives slightly for a long time and chaufeur will be made to feel tired.In order to improve hand-held design and the alerting ability of handling maneuver, servo steering system is arisen at the historic moment.
Current servo steering system on the market mainly contains hydraulic power-assist steering system, electron steering hydraulic power-assist steering system, electric boosting steering system.Though electric power steering development time is shorter, rely on the large I of its power-assisted automatically to adjust with the speed of a motor vehicle, assemble simply, do not consume energy when not turning to, without advantage share of market such as hydraulic oil environmentally safes in continuous increase.
Controller as the core component of electric boosting steering system directly control the size of power-assisted, direction and pilot control steering handwheel time feel.But controller was once lose efficacy, and whole servo steering system will non helping hand or to the power-assisted made mistake, and directly threatens the safety traffic on chaufeur and road.Therefore, the security strategy improving controller of exhausting one's ability, improves the most important thing when safe class of controller becomes controller soft hardware design.
See Fig. 1, what provide in figure is the electric boosting steering system generally adopted now, comprise some sensors for transmitting automobile live signal, the electric power steering master controller MCU of the one steering wheel moment signal 1 transmitted for pick-up transducers, steering wheel angle signal 2, vehicle speed signal 3, engine rotational speed signal 4, ignition signal 5 and current of electric feedback signal 9, first power supply chip of powering for master controller MCU, assist motor driving circuit 7, assist motor 8.
First power supply chip is that master controller MCU powers, the steering wheel moment signal 1 that master controller MCU pick-up transducers transmits, steering wheel angle signal 2, vehicle speed signal 3, engine rotational speed signal 4, ignition signal 5 and current of electric feedback signal 9, output motor controlling quantity after the Power assisted control algorithm of main controller system MCU storage inside calculates, the rear drive assist motor 8 through assist motor driving circuit 7 provides power-assisted for chaufeur.
The present invention mainly by increasing a completely independently monitored control system in original Electric Power Steering Control System, the input/output signal of the former controller of real-time monitoring and running state of programs, if monitor exception, monitored control system can disconnect power-assisted, make vehicle return to pure mechanical steering in time, thus reach the object substantially increasing whole system safe class.
Summary of the invention
Technical matters to be solved by this invention: it is not enough and provide a kind of Electric Power Steering Control System of Automobile improving the safe class of controller that the instability existed for existing controller, safe class are low etc.
Technical matters solved by the invention can realize by the following technical solutions:
A kind of Electric Power Steering Control System of Automobile, comprising:
Some sensors for transmitting automobile live signal;
One for gathering the signal of described sensor and current of electric feedback signal and the electric power steering master controller MCU made a response;
One first power supply chip of powering for described master controller MCU, one end of described first power supply chip is connected with described electric power steering master controller MCU, and its other end is connected with external power supply;
One assist motor driving circuit;
One assist motor;
One to associate with described electric power steering master controller MCU and to be controlled the first circuit breaker of break-make by described electric power steering master controller MCU, and described first circuit breaker is arranged between described assist motor driving circuit and external power supply; And
One completely independently for monitoring the described input and output of electric power steering master controller MCU and the electric power steering monitored control system of running state of programs thereof in real time, described monitored control system comprises a supervisory control device MCU, the one second source chip and of powering for described supervisory control device MCU separately associates with described supervisory control device MCU and is controlled the second circuit breaker of break-make by described supervisory control device MCU, one end of described second source chip is connected with external power supply, its other end is connected with described supervisory control device MCU, described second circuit breaker is arranged between described assist motor driving circuit and external power supply,
Being undertaken communicating by serial data bus interface TXD and RXD of described supervisory control device MCU and described master controller MCU timing verifies;
Described supervisory control device MCU sends a handshake data bag every a regular time to described electric power steering master controller MCU by serial data bus interface TXD and RXD, then wait for that described electric power steering master controller MCU makes correct response in specific time, if described electric power steering master controller MCU nonreply or fail to make correct response within specific time, then think that micro controller system internal processes deadlock or the race of described electric power steering master controller MCU flies, described supervisory control device MCU disconnects the power supply supply of described assist motor driving circuit by described second circuit breaker, make systematic evaluation to the state of a safety,
Described electric power steering master controller MCU sends a handshake data bag every a regular time to described supervisory control device MCU by serial data bus interface TXD and RXD, then wait for that described supervisory control device MCU makes correct response in specific time, if described supervisory control device MCU nonreply or fail to make correct response within specific time, then think that micro controller system internal processes deadlock or the race of described supervisory control device MCU flies, described electric power steering master controller MCU disconnects the power supply supply of described assist motor driving circuit by described first circuit breaker, make systematic evaluation to the state of a safety.
Owing to have employed technical scheme as above, beneficial effect of the present invention is: effectively prevent the traffic accident causing servo-steering control system non helping hand because controller lost efficacy or cause to the power-assisted made mistake; If monitored control system detects exception, monitoring system can disconnect power-assisted, makes vehicle return to pure mechanical steering in time, thus reaches the object substantially increasing whole system safe class.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the electric boosting steering system of common employing.
Fig. 2 is schematic diagram of the present invention.
Fig. 3 is circuit diagram of the present invention.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
See Fig. 2 and Fig. 3, the present invention adds a completely independently monitored control system 12 on the basis of original electric boosting steering system, and monitored control system comprises the second source chip U2 and a circuit breaker S2 that a supervisory control device MCU121, powers for supervisory control device MCU separately.Second source chip one end is connected with external power supply, and the other end is connected with supervisory control device MCU121.Circuit breaker S2 one end is connected with external power supply, and the other end is connected with assist motor driving circuit 7.
Supervisory control device MCU121 is its power supply by independent second source chip U2, like this, even if the first power supply chip U1 of main controller system MCU6 lost efficacy, cause main controller system MCU6 operation irregularity, the work of monitoring main controller system MCU6 also can be completely unaffected, and by the power supply input that circuit breaker S2 disconnects assist motor 8, make vehicle return to pure mechanical steering state.
Monitored control system 12 is the monitoring incoming signal 1 ~ 5 of Electric Power Steering Control System and the current feedback signal 9 of assist motor 8 in real time, if confirm that these signals have exceeded normal operating range, then can stop power-assisted by cut-off breaker S2.
In addition, being undertaken communicating by Universal Serial Bus interface TXD10 with RXD11 and verify of supervisory control device MCU121 and master controller MCU6 timing, supervisory control device MCU12 sends a handshake data bag every a regular time master controller MCU6, then waits for that master controller MCU6 makes correct response in specific time.If master controller MCU6 nonreply or fail to make correct response within specific time, then think that deadlock or the race of master controller MCU6 micro controller system internal processes flies, namely supervisory control device MCU121 now disconnects the power supply supply of assist motor driving circuit 7 by circuit breaker S2, make systematic evaluation to the state of a safety.
In like manner, master controller MCU6 also sends a handshake data bag every a regular time to supervisory control device MCU121 by Universal Serial Bus, then waits for that supervisory control device MCU121 makes correct response in specific time.If supervisory control device MCU121 nonreply or fail to make correct response within specific time, then think that deadlock or the race of supervisory control device MCU121 micro controller system internal processes flies.Now supervisory control device MCU121 is just no longer reliable, and the safe class of whole system will decline to some extent, and therefore master controller MCU6 can carry out conservative control or direct cut-off breaker S1, and assist motor 8 is quit work.
More than show and describe groundwork of the present invention and principal character and advantage of the present invention.The technical personnel of the industry should be understood; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (1)

1. an Electric Power Steering Control System of Automobile, is characterized in that, comprising:
Some sensors for transmitting automobile live signal;
One for gathering the signal of described sensor and current of electric feedback signal and the electric power steering master controller MCU made a response;
One first power supply chip of powering for described electric power steering master controller MCU, one end of described first power supply chip is connected with described electric power steering master controller MCU, and its other end is connected with external power supply;
One assist motor driving circuit;
One assist motor;
One to associate with described electric power steering master controller MCU and to be controlled the first circuit breaker of break-make by described electric power steering master controller MCU, and described first circuit breaker is arranged between described assist motor driving circuit and external power supply; And
One completely independently for monitoring the described input and output of electric power steering master controller MCU and the electric power steering monitored control system of running state of programs thereof in real time, described monitored control system comprises a supervisory control device MCU, the one second source chip and of powering for described supervisory control device MCU separately associates with described supervisory control device MCU and is controlled the second circuit breaker of break-make by described supervisory control device MCU, one end of described second source chip is connected with external power supply, its other end is connected with described supervisory control device MCU, described second circuit breaker is arranged between described assist motor driving circuit and external power supply,
Being undertaken communicating by serial data bus interface TXD and RXD of described supervisory control device MCU and described electric power steering master controller MCU timing verifies;
Described supervisory control device MCU sends a handshake data bag every a regular time to described electric power steering master controller MCU by serial data bus interface TXD and RXD, then wait for that described electric power steering master controller MCU makes correct response in specific time, if described electric power steering master controller MCU nonreply or fail to make correct response within specific time, then think that micro controller system internal processes deadlock or the race of described electric power steering master controller MCU flies, described supervisory control device MCU disconnects the power supply supply of described assist motor driving circuit by described second circuit breaker, make systematic evaluation to the state of a safety,
Described electric power steering master controller MCU sends a handshake data bag every a regular time to described supervisory control device MCU by serial data bus interface TXD and RXD, then wait for that described supervisory control device MCU makes correct response in specific time, if described supervisory control device MCU nonreply or fail to make correct response within specific time, then think that micro controller system internal processes deadlock or the race of described supervisory control device MCU flies, described electric power steering master controller MCU disconnects the power supply supply of described assist motor driving circuit by described first circuit breaker, make systematic evaluation to the state of a safety.
CN201310350323.9A 2013-08-12 2013-08-12 A kind of Electric Power Steering Control System of Automobile Active CN103407486B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104670321B (en) * 2013-11-29 2017-10-31 比亚迪股份有限公司 Electri forklift and the steering control system for electri forklift
CN105128925A (en) * 2015-09-08 2015-12-09 苏州市博得立电源科技有限公司 Electric power steering control system of automobile
CN105645315B (en) * 2016-01-05 2017-10-13 浙江工业大学 A kind of three fulcrum forklift electric power-assisted steering control methods
CN107380257B (en) * 2017-07-28 2019-05-21 安徽江淮汽车集团股份有限公司 A kind of semiautomatic parking control method and system
CN110576899A (en) * 2018-06-11 2019-12-17 沈阳思创通用电气有限公司 Power-assisted steering motor controller

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Publication number Priority date Publication date Assignee Title
US6373217B1 (en) * 1999-07-02 2002-04-16 Nsk Ltd. Control apparatus of electric power steering system
CN101308383B (en) * 2008-07-08 2010-08-18 同济大学 Electric power-assisted steering control method and system
CN201901171U (en) * 2010-09-28 2011-07-20 上海航天汽车机电股份有限公司 Electric power-assisted steering control system adopting dual-microcomputer to jointly control relay
CN103010299A (en) * 2012-12-14 2013-04-03 奇瑞汽车股份有限公司 Electric power-assisted steering system of automobile
CN103219986A (en) * 2013-03-04 2013-07-24 海信科龙电器股份有限公司 Polarity insensitive transmit-receive unit and RS-485 communication circuit
CN203439105U (en) * 2013-08-12 2014-02-19 东方久乐汽车电子(上海)有限公司 Automobile electric power assisted steering control system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6373217B1 (en) * 1999-07-02 2002-04-16 Nsk Ltd. Control apparatus of electric power steering system
CN101308383B (en) * 2008-07-08 2010-08-18 同济大学 Electric power-assisted steering control method and system
CN201901171U (en) * 2010-09-28 2011-07-20 上海航天汽车机电股份有限公司 Electric power-assisted steering control system adopting dual-microcomputer to jointly control relay
CN103010299A (en) * 2012-12-14 2013-04-03 奇瑞汽车股份有限公司 Electric power-assisted steering system of automobile
CN103219986A (en) * 2013-03-04 2013-07-24 海信科龙电器股份有限公司 Polarity insensitive transmit-receive unit and RS-485 communication circuit
CN203439105U (en) * 2013-08-12 2014-02-19 东方久乐汽车电子(上海)有限公司 Automobile electric power assisted steering control system

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Address after: 201201 1, 4 building, 219 Pudong New Area Road, Shanghai.

Patentee after: Orient car electronics (Shanghai) Limited by Share Ltd

Address before: 201201 1, 4 building, 219 Pudong New Area Road, Shanghai.

Patentee before: Oriental long automotive electronics (Shanghai) Co., Ltd.

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Effective date of registration: 20180802

Address after: 334100 Jiangxi Shangrao Shangrao economic and Technological Development Zone Cai Cheng Auto parts base 7 workshop

Patentee after: Jiangxi he Beijing Great Automotive Components Company Limited

Address before: 201201 1, 4 building, 219 Pudong New Area Road, Shanghai.

Patentee before: Orient car electronics (Shanghai) Limited by Share Ltd

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Effective date of registration: 20210915

Address after: 200120 building 4, No. 309, Renqing Road, Heqing Town, Pudong New Area, Shanghai

Patentee after: EAST JOY LONG AUTOMOBILE ELECTRONIC (SHANGHAI) Co.,Ltd.

Address before: 334100 Jiangxi Shangrao Shangrao economic and Technological Development Zone Cai Cheng Auto parts base 7 workshop

Patentee before: JIANGXI HEZHEN AUTO PARTS Co.,Ltd.

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