CN206537342U - A kind of composite turning system - Google Patents

A kind of composite turning system Download PDF

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Publication number
CN206537342U
CN206537342U CN201720045528.XU CN201720045528U CN206537342U CN 206537342 U CN206537342 U CN 206537342U CN 201720045528 U CN201720045528 U CN 201720045528U CN 206537342 U CN206537342 U CN 206537342U
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Prior art keywords
wheel
hub motor
steering
wheel hub
motor
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CN201720045528.XU
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杨遵四
赵万忠
王春燕
张寒
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

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  • Steering Control In Accordance With Driving Conditions (AREA)

Abstract

The utility model discloses a kind of composite turning system, the system includes electric boosting steering system and wire controlled four wheel steering system, including an assist motor and four wheel hub motors.According to pilot control steering wheel angle and automobile speed, current yaw velocity is calculated.The utility model proposes composite turning system model switching method according to yaw velocity, side acceleration, automobile speed and steering wheel angle, realize the working condition for switching assist motor and wheel hub motor in different speeds and driver's different operating, different power-assisted effects are provided, ensure automobile light and flexible in low speed Turning travel, high speed steering is reliable and stable when travelling.

Description

A kind of composite turning system
Technical field
The utility model is related to steering technical field, more particularly to a kind of composite turning system.
Background technology
Automobile steering system is the crucial assembly for determining vehicle active safety, and orthodox car steering is mechanical system System, the divertical motion of automobile is, by pilot control steering wheel, to be delivered to steered wheel by steering gear and realize.
Automobile steer-by-wire system eliminates the mechanical connection between steering wheel and deflecting roller, is turned completely by automatically controlled realize To, broken away from the various limitations of conventional steering system, not only can the force transfering characteristic that turns to of free design vehicle, and can be with The angle transmission characteristic that design vehicle is turned to, the design to motor turning characteristic brings immensity, is automobile steering system Significant innovation.But simultaneously because without mechanical connection, reliability is poor.
It is smaller that electric boosting steering system can be provided power-assisted.For motorbus, sometimes electric power steering System is difficult to meet power steering.Corresponding power steering can be provided under any circumstance in order to meet automobile, it may be necessary to Two sets of servo steering systems are intervened simultaneously, but two sets of servo steering systems are while when working, can produce certain energy dissipation.
Utility model content
Technical problem to be solved in the utility model is that the defect being directed to involved by background technology is multiple there is provided one kind Close steering.
The utility model uses following technical scheme to solve above-mentioned technical problem:
A kind of composite turning system, including electric boosting steering system and wire controlled four wheel steering system;
The electric boosting steering system includes steering wheel, steering wheel angle sensor, steering column, reducing gear, clutch Device, assist motor, course changing control ECU, vehicle speed sensor, lateral acceleration sensor and rack and pinion steering gear;
The wire controlled four wheel steering system includes front axle, the near front wheel wheel hub motor, off-front wheel wheel hub motor, motor control list Member, left rear wheel wheel hub motor, off hind wheel wheel hub motor and rear axle;
The steering wheel of described steering column one end and automobile is fixedly linked, and the other end passes through the rack and pinion steering gear and institute Front axle is stated to be connected;
The steering wheel angle sensor is arranged on steering column, the corner for obtaining steering wheel;
The assist motor is connected by clutch with reducing gear input, for providing power steering;
The reducing gear output end is arranged on steering column;
The vehicle speed sensor and lateral acceleration sensor are arranged on body of a motor car, are respectively used to obtain automobile speed With automobile side angle acceleration;
The near front wheel, the off-front wheel of the front axle two ends respectively with automobile are connected;
The near front wheel wheel hub motor, off-front wheel wheel hub motor are separately mounted to the near front wheel, on off-front wheel, are respectively used to drive The near front wheel, the off-front wheel of electrical automobile;
Left rear wheel, the off hind wheel of the rear axle two ends respectively with automobile are connected;
The left rear wheel wheel hub motor, off hind wheel wheel hub motor are separately mounted to left rear wheel, on off hind wheel, are respectively used to drive Left rear wheel, the off hind wheel of electrical automobile;
The course changing control ECU respectively with assist motor, steering wheel angle sensor, vehicle speed sensor, side acceleration Sensor, motor control unit are electrically connected, for being passed according to steering wheel angle sensor, vehicle speed sensor, side acceleration Steering wheel angle that sensor is measured, automobile speed, side acceleration control assist motor work, calculate the near front wheel wheel hub motor, Off-front wheel wheel hub motor, left rear wheel wheel hub motor, the torque of off hind wheel wheel hub motor simultaneously produce corresponding current signal and passed to The motor control unit;
The motor control unit respectively with the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, the right side Rear wheel hub motors, course changing control ECU are electrically connected, for according to the current signal that receives control the near front wheel wheel hub motor, Off-front wheel wheel hub motor, left rear wheel wheel hub motor and the work of off hind wheel wheel hub motor.
The invention also discloses a kind of mode switching method based on the composite turning system, comprise the steps of:
Step 1), the steering wheel angle and vehicle speed sensor that course changing control ECU is measured according to steering wheel angle sensor are surveyed The current automobile yaw velocity of automobile speed signal of change obtained;
Step 2), course changing control ECU adds according to current yaw velocity, automobile speed, steering wheel angle and automobile side angle Speed is calculated behind current power-assisted needed for turning to and the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, the right side Take turns the torque of wheel hub motor;
Step 3), course changing control ECU is according to the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, the right side The torque of rear wheel hub motors produces corresponding current signal and passes to motor control unit;
Step 4), course changing control ECU will calculate obtained yaw velocity ωrWith default automobile limit yaw angular speed Threshold value ωr0Compare;The automobile speed u that vehicle speed sensor is measured respectively with default automobile low velocity threshold u1, default automobile High Speed Threshold u2Compare;The steering wheel angle θ that steering wheel angle sensor is measuredswWith default steering wheel angle threshold θsw0 Compare;The automobile side angle acceleration a that lateral acceleration sensor is measuredyWith default automobile lateral acceleration limit threshold value ay0 Compare;
Step 4.1), as yaw velocity ωr> ωr0When;
Step 4.1.1), course changing control ECU control assist motors do not work;
Step 4.1.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel wheel hub motor not to work and root According to the current signal left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation received;
Step 4.2), as yaw velocity ωr< ωr0, side acceleration ay> ay0When;
Step 4.2.1), course changing control ECU control assist motors do not work;
Step 4.2.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation;
Step 4.3), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u < u1, steering wheel turn Angle θsw> θsw0When;
Step 4.3.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.3.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and the forward direction work of off hind wheel wheel hub motor;
Step 4.4), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u < u1, steering wheel turn Angle θsw< θsw0When;
Step 4.4.1), course changing control ECU control assist motors do not work;
Step 4.4.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and the forward direction work of off hind wheel wheel hub motor;
Step 4.5), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u1< u < u2, direction Disk rotational angle thetasw> θsw0When;
Step 4.5.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.5.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation;
Step 4.6), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u1< u < u2, direction Disk rotational angle thetasw< θsw0When;
Step 4.6.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.6.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received Wheel hub motor forward direction work, and control left rear wheel wheel hub motor and off hind wheel wheel hub motor not to work;
Step 4.7), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u > u2, steering wheel turn Angle θsw> θsw0When;
Step 4.7.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.7.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel wheel hub motor not to work, and root According to the current signal control left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation received;
Step 4.8), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u > u2, steering wheel turn Angle θsw< θsw0When;
Step 4.8.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.8.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel wheel hub motor not to work, control Left rear wheel wheel hub motor and off hind wheel wheel hub motor do not work.
It is used as a kind of further prioritization scheme of mode switching method of composite turning system of the utility model, step 1) in The automobile speed signal that the steering wheel angle and vehicle speed sensor that course changing control ECU is measured according to steering wheel angle sensor are measured The formula for calculating current automobile yaw velocity is as follows:
In formula:a0=k1k2(a+b)2+(k2b-k1a)mu2;b0=k1k2(a+b)u;A is before barycenter is arrived Axle wheelbase;B is barycenter to rear axle wheelbase;L=a+b;U is car speed;ωrFor automobile yaw velocity;θswTurn for steering wheel Angle;KsScope can like according to driver to be chosen, and the scope is 0.12-0.37 1/s;k1、k2For front and back wheel cornering stiffness;M is Complete vehicle quality.
The utility model uses above technical scheme compared with prior art, with following technique effect:
1. setting up electric boosting steering system on the basis of line traffic control four-wheel steering system, wire controlled four wheel steering system can be made up The problem of poor reliability of uniting.
2. it can solve the problem that the problem of electric power steering can not provide enough power steerings.
3. can be operated according to different automobile running working conditions and driver, switch different power steering mode of operations, Different power-assisted effects are provided.
Brief description of the drawings
Fig. 1 is the utility model composite turning system construction drawing;
Fig. 2 is the utility model mode switching method control flow chart.
In figure, 1- steering wheels, 2- steering wheel angle sensors, 3- steering columns, 4- reducing gears, 5- clutches, 6- power-assisteds Motor, 7- course changing controls ECU, 8- vehicle speed sensor, 9- lateral acceleration sensors, 10- rack and pinion steering gears, 11- front axles, 12- the near front wheel wheel hub motors, 13- off-front wheel wheel hub motors, 14- motor control units, 15- left rear wheel wheel hub motors, after 16- is right Take turns wheel hub motor, 17- rear axles.
Embodiment
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings:
As shown in figure 1, the utility model develops a kind of composite turning system, including electric boosting steering system and line traffic control Four-wheel steering system;
The electric boosting steering system includes steering wheel, steering wheel angle sensor, steering column, reducing gear, clutch Device, assist motor, course changing control ECU, vehicle speed sensor, lateral acceleration sensor and rack and pinion steering gear;
The wire controlled four wheel steering system includes front axle, the near front wheel wheel hub motor, off-front wheel wheel hub motor, motor control list Member, left rear wheel wheel hub motor, off hind wheel wheel hub motor and rear axle;
The steering wheel of described steering column one end and automobile is fixedly linked, and the other end passes through the rack and pinion steering gear and institute Front axle is stated to be connected;
The steering wheel angle sensor is arranged on steering column, the corner for obtaining steering wheel;
The assist motor is connected by clutch with reducing gear input, for providing power steering;
The reducing gear output end is arranged on steering column;
The vehicle speed sensor and lateral acceleration sensor are arranged on body of a motor car, are respectively used to obtain automobile speed With automobile side angle acceleration;
The near front wheel, the off-front wheel of the front axle two ends respectively with automobile are connected;
The near front wheel wheel hub motor, off-front wheel wheel hub motor are separately mounted to the near front wheel, on off-front wheel, are respectively used to drive The near front wheel, the off-front wheel of electrical automobile;
Left rear wheel, the off hind wheel of the rear axle two ends respectively with automobile are connected;
The left rear wheel wheel hub motor, off hind wheel wheel hub motor are separately mounted to left rear wheel, on off hind wheel, are respectively used to drive Left rear wheel, the off hind wheel of electrical automobile;
The course changing control ECU respectively with assist motor, steering wheel angle sensor, vehicle speed sensor, side acceleration Sensor, motor control unit are electrically connected, for steering wheel angle sensor, vehicle speed sensor, lateral acceleration sensor The data control assist motor work measured, calculate the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, The torque of off hind wheel wheel hub motor simultaneously produces corresponding current signal and passes to the motor control unit;
The motor control unit respectively with the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, the right side Rear wheel hub motors, course changing control ECU are electrically connected, for according to the current signal that receives control the near front wheel wheel hub motor, Off-front wheel wheel hub motor, left rear wheel wheel hub motor and the work of off hind wheel wheel hub motor.
As shown in Fig. 2 the utility model also disclosed a kind of composite turning system model switching method, following step is included Suddenly:
Step 1), the steering wheel angle and vehicle speed sensor that course changing control ECU is measured according to steering wheel angle sensor are surveyed The current automobile yaw velocity of automobile speed signal of change obtained:
In formula:a0=k1k2(a+b)2+(k2b-k1a)mu2;b0=k1k2(a+b)u;A is before barycenter is arrived Axle wheelbase;B is barycenter to rear axle wheelbase;L=a+b;U is car speed;ωrFor automobile yaw velocity;θswTurn for steering wheel Angle;KsScope can like according to driver to be chosen, and the scope is 0.12-0.37 1/s;k1、k2For front and back wheel cornering stiffness;M is Complete vehicle quality.
Step 2), course changing control ECU adds according to current yaw velocity, automobile speed, steering wheel angle and automobile side angle Speed is calculated behind current power-assisted needed for turning to and the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, the right side Take turns the torque of wheel hub motor;
Step 3), course changing control ECU is according to the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, the right side The torque of rear wheel hub motors produces corresponding current signal and passes to motor control unit;
Step 4), course changing control ECU will calculate obtained yaw velocity ωrWith default automobile limit yaw angular speed Threshold value ωr0Compare;The automobile speed u that vehicle speed sensor is measured respectively with default automobile low velocity threshold u1, default automobile High Speed Threshold u2Compare;The steering wheel angle θ that steering wheel angle sensor is measuredswWith default steering wheel angle threshold θsw0 Compare;The automobile side angle acceleration a that lateral acceleration sensor is measuredyWith default automobile lateral acceleration limit threshold value ay0 Compare;
Step 4.1), as yaw velocity ωr> ωr0When, using four-wheel steering pattern 1:
Step 4.1.1), course changing control ECU control assist motors do not work;
Step 4.1.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel wheel hub motor not to work and root According to the current signal left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation received;
Step 4.2), as yaw velocity ωr< ωr0, side acceleration ay> ay0When, using four-wheel steering pattern 2:
Step 4.2.1), course changing control ECU control assist motors do not work;
Step 4.2.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation;
Step 4.3), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u < u1, steering wheel turn Angle θsw> θsw0When, using composite turning pattern 1:
Step 4.3.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.3.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and the forward direction work of off hind wheel wheel hub motor;
Step 4.4), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u < u1, steering wheel turn Angle θsw< θsw0When, using four-wheel steering pattern 3:
Step 4.4.1), course changing control ECU control assist motors do not work;
Step 4.4.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and the forward direction work of off hind wheel wheel hub motor;
Step 4.5), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u1< u < u2, direction Disk rotational angle thetasw> θsw0When, using composite turning pattern 2:
Step 4.5.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.5.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received The work of wheel hub motor forward direction, control left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation;
Step 4.6), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u1< u < u2, direction Disk rotational angle thetasw< θsw0When, using composite turning pattern 3:
Step 4.6.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.6.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel according to the current signal received Wheel hub motor forward direction work, and control left rear wheel wheel hub motor and off hind wheel wheel hub motor not to work;
Step 4.7), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u > u2, steering wheel turn Angle θsw> θsw0When, using composite turning pattern 4:
Step 4.7.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.7.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel wheel hub motor not to work, and root According to the current signal control left rear wheel wheel hub motor and off hind wheel wheel hub motor reverse operation received;
Step 4.8), as yaw velocity ωr< ωr0, side acceleration ay< ay0, automobile speed u > u2, steering wheel turn Angle θsw< θsw0When, using electric power steering pattern:
Step 4.8.1), course changing control ECU Power assisted control assist motor forward direction work according to needed for when front steering;
Step 4.8.2), motor control unit controls the near front wheel wheel hub motor and off-front wheel wheel hub motor not to work, control Left rear wheel wheel hub motor and off hind wheel wheel hub motor do not work.
In formula:ωr0It is preferential to use vehicle steadily operating mode limit inferior yaw velocity;ay0It is preferential to use vehicle steadily operating mode Limit inferior side acceleration.
Those skilled in the art of the present technique are it is understood that unless otherwise defined, all terms used herein (including skill Art term and scientific terminology) there is the general understanding identical with the those of ordinary skill in the utility model art to anticipate Justice.It should also be understood that those terms defined in such as general dictionary should be understood that with upper with prior art The consistent meaning of meaning hereinafter, and unless defined as here, will not with idealization or excessively formal implication come Explain.
Above-described embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect One step is described in detail, be should be understood that and be the foregoing is only embodiment of the present utility model, is not used to limit The utility model processed, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements done etc., It should be included within protection domain of the present utility model.

Claims (1)

1. a kind of composite turning system, it is characterised in that including electric boosting steering system and wire controlled four wheel steering system;
The electric boosting steering system comprising steering wheel, steering wheel angle sensor, steering column, reducing gear, clutch, help Force motor, course changing control ECU, vehicle speed sensor, lateral acceleration sensor and rack and pinion steering gear;
The wire controlled four wheel steering system include front axle, the near front wheel wheel hub motor, off-front wheel wheel hub motor, motor control unit, Left rear wheel wheel hub motor, off hind wheel wheel hub motor and rear axle;
The steering wheel of described steering column one end and automobile is fixedly linked, the other end by the rack and pinion steering gear and it is described before Axle is connected;
The steering wheel angle sensor is arranged on steering column, the corner for obtaining steering wheel;
The assist motor is connected by clutch with reducing gear input, for providing power steering;
The reducing gear output end is arranged on steering column;
The vehicle speed sensor and lateral acceleration sensor are arranged on body of a motor car, are respectively used to obtain automobile speed and vapour Car side acceleration;
The near front wheel, the off-front wheel of the front axle two ends respectively with automobile are connected;
The near front wheel wheel hub motor, off-front wheel wheel hub motor are separately mounted to the near front wheel, on off-front wheel, are respectively used to drive vapour The near front wheel, the off-front wheel of car;
Left rear wheel, the off hind wheel of the rear axle two ends respectively with automobile are connected;
The left rear wheel wheel hub motor, off hind wheel wheel hub motor are separately mounted to left rear wheel, on off hind wheel, are respectively used to drive vapour Left rear wheel, the off hind wheel of car;
The course changing control ECU is sensed with assist motor, steering wheel angle sensor, vehicle speed sensor, side acceleration respectively Device, motor control unit are electrically connected, for according to steering wheel angle sensor, vehicle speed sensor, lateral acceleration sensor Steering wheel angle, automobile speed, the side acceleration control assist motor measured works, and calculates before the near front wheel wheel hub motor, the right side Wheel wheel hub motor, left rear wheel wheel hub motor, the torque of off hind wheel wheel hub motor and produce corresponding current signal pass to it is described Motor control unit;
The motor control unit respectively with the near front wheel wheel hub motor, off-front wheel wheel hub motor, left rear wheel wheel hub motor, off hind wheel Wheel hub motor, course changing control ECU are electrically connected, for being controlled according to the current signal received before the near front wheel wheel hub motor, the right side Take turns wheel hub motor, left rear wheel wheel hub motor and the work of off hind wheel wheel hub motor.
CN201720045528.XU 2017-01-16 2017-01-16 A kind of composite turning system Active CN206537342U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106945719A (en) * 2017-01-16 2017-07-14 南京航空航天大学 A kind of composite turning system and its mode switching method
CN108657270A (en) * 2018-06-11 2018-10-16 南京航空航天大学 A kind of vehicle wire-controlled steering system, fault tolerant control method and method for diagnosing faults

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106945719A (en) * 2017-01-16 2017-07-14 南京航空航天大学 A kind of composite turning system and its mode switching method
CN108657270A (en) * 2018-06-11 2018-10-16 南京航空航天大学 A kind of vehicle wire-controlled steering system, fault tolerant control method and method for diagnosing faults
CN108657270B (en) * 2018-06-11 2023-08-15 南京航空航天大学 Vehicle steer-by-wire system, fault-tolerant control method and fault diagnosis method

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