WO2016107581A1 - 汽车转弯防侧翻的控制系统及其控制方法 - Google Patents
汽车转弯防侧翻的控制系统及其控制方法 Download PDFInfo
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- WO2016107581A1 WO2016107581A1 PCT/CN2015/099886 CN2015099886W WO2016107581A1 WO 2016107581 A1 WO2016107581 A1 WO 2016107581A1 CN 2015099886 W CN2015099886 W CN 2015099886W WO 2016107581 A1 WO2016107581 A1 WO 2016107581A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
- B60G17/0162—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input mainly during a motion involving steering operation, e.g. cornering, overtaking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
- B60G17/0165—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/0195—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the regulation being combined with other vehicle control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/06—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid
- B60G21/073—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/05—Attitude
- B60G2400/051—Angle
- B60G2400/0511—Roll angle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/05—Attitude
- B60G2400/052—Angular rate
- B60G2400/0521—Roll rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/20—Speed
- B60G2400/208—Speed of wheel rotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/40—Steering conditions
- B60G2400/41—Steering angle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/01—Attitude or posture control
- B60G2800/012—Rolling condition
- B60G2800/0124—Roll-over conditions
Definitions
- the invention relates to a control method and system for turning and preventing rollover of a vehicle, in particular to a control system for turning and preventing rollover of a vehicle under the condition of front wheel drive and a control method thereof.
- Chinese patent 200920157324.0 discloses a vehicle with an anti-rollover system, the anti-rollover system comprises two left passive hydraulic pumps; two right passive hydraulic pumps; a left active hydraulic pump and a right active hydraulic pump, fixed in the office On the vehicle body, the left active hydraulic pump is respectively connected with two left passive hydraulic pumps, and the right active hydraulic pump is respectively connected with two right passive hydraulic pumps; a moving device, the output end of which is connected to the plunger of the left active hydraulic pump and the plunger of the right active hydraulic pump through two connecting rods respectively, so that the plunger of the left active hydraulic pump and the column of the right active hydraulic pump
- the servo is used for driving the reverse motion; the servo motor is used to drive the reduction gear; and the control device is connected to the servo motor and sends a corresponding signal according to the driving condition of the vehicle to instruct the servo motor to perform corresponding operations; wherein:
- the control device includes a triggering device, a control circuit having a trigger switch, a servo motor,
- the anti-rollover system is an independent system, and has unique features, such as being able to quickly move the center of gravity of the car toward the turning side when the car makes a sharp turn, effectively preventing the car from rolling over; however, it has a large disadvantage : The mechanism itself is more complicated, there is accumulated error in the transmission process, or the damage of any component may lead to system failure, thus affecting the realization of anti-rollover.
- Chinese Patent No. 201310014617.4 discloses a method for preventing vehicle rollover, comprising: monitoring a vehicle tilt by a tilt sensor and sensing a rollover of the vehicle in a certain direction; according to a calculation by a central processor disposed in the controller The tilt threshold determines the occurrence of the rollover; the vehicle is steered in the sensed rollover direction, the steering is controlled by the controller; as the steering accelerates the vehicle by changing the throttle position, the throttle is controlled by the controller; The vehicle is braked by a brake when the rollover is reduced, the brake being controlled by the controller.
- the method for preventing vehicle rollover disclosed in the patent application documents accelerates the vehicle and reduces the sensing side by turning the vehicle in the induced rollover direction and changing the throttle position in the same direction. In small cases, the vehicle is braked and the vehicle is finally stabilized.
- the anti-vehicle rollover method described in the patent application can prevent the vehicle from rolling over, but for any other vehicle in motion, especially for a fast-moving vehicle on a highway or a viaduct, any vehicle
- the emergency stop of the vehicle is easy to cause rear-end collision of the vehicle behind it, and it cannot guarantee the orderly driving of the vehicle behind it; therefore, the method for preventing vehicle rollover described in Chinese Patent 201310014617.4 is not particularly suitable for The usual vehicle is more suitable for racing.
- the object of the present invention is to solve the problem that the current technical solution has a disadvantage that when the vehicle is bent, the deceleration is unfavorable and the rollover is easy to occur, and a control system for turning and preventing the rollover of the automobile and a control method thereof are provided.
- the technical solution adopted by the present invention to solve the technical problem thereof is: a control system for turning and preventing rollover of a vehicle, which is powered by an automobile power source, and includes a controller, four hydraulic oil cylinders, a declination measuring instrument, a rotational speed measuring instrument, and the control
- the data is installed in the vehicle, and includes a data acquisition module, a data processing module, and a data execution module.
- the data acquisition module and the data execution module are electrically connected to the data processing module, and the input ends of the data acquisition module are respectively
- the declination measuring instrument and the tachometer are electrically connected, and the output end of the data execution module is respectively connected to the control ends of the four hydraulic cylinders, and the declination measuring instrument is mounted on the left front wheel of the vehicle, and the rotation speed is
- the measuring instrument is mounted on the left front wheel of the vehicle, two of the four hydraulic cylinders are respectively installed between the frame and the front axle, and the other two of the four hydraulic cylinders are mounted on the frame and the rear. Between the axles, the four hydraulic cylinders are symmetrically arranged two by two.
- the data acquisition module is configured to receive the eccentricity fed back by the wheel yaw measuring instrument and the speed fed back by the rotational speed measuring instrument; the angling measuring instrument is installed on the left front wheel, and the rotational speed measuring instrument is installed on the left side.
- the data processing module calculates the position change value of the center of gravity of the vehicle at the moment according to the yaw angle, and the safety threshold value of the position of the center of gravity of the vehicle at the speed, and compares the two to determine that the vehicle rollover occurs;
- the data execution module automatically controls the working conditions of the four hydraulic cylinders according to the output result of the data processing module.
- the present invention has the following advantages over the prior art: the control method of the vehicle turning anti-rollover according to the present invention, by setting a special central processor, so that the driving speed of the vehicle is unchanged The vehicle can be prevented from rolling over to improve the driving safety of the vehicle.
- the present invention has a positive effect in the process of vehicle rollover due to collision.
- two detonating airbags are disposed between the frame and the front axle, and two detonating airbags are also disposed between the frame and the rear axle, and the control ends of the four detonating airbags are
- the data execution module is electrically connected. Play a temporary help.
- the wheel declination measuring instrument is a wheel declination measuring instrument for monitoring the inclination of the vehicle and sensing the declination angle ⁇ L of the vehicle during the instantaneous turning, the tachometer measuring the wheel speed and sensing the vehicle traveling.
- a speed measuring instrument of speed v L for calculating a gravity center position G change ⁇ a of the current vehicle at speed v L to control hydraulic cylinder action in comparison with a safe center of gravity G position change threshold at the vehicle speed v L
- a controller that urges the body to rise in a distance against the change in the position of the center of gravity to ensure that the vehicle is safely driven.
- the controller is an ECU.
- the hydraulic cylinder is provided with a grating scale for measuring the extension distance of the hydraulic cylinder, and the output end of the grating is electrically connected to the data acquisition module.
- the utility model relates to a control method for turning and preventing rollover of a vehicle, which is suitable for the above control system for turning and preventing rollover of a car, comprising the following steps:
- Step one manually set the existing parameters
- the existing parameters include the track B and the wheelbase L, the standard body center position G, the center of gravity G position change safety threshold, the standard body center position G by the half track data a and the half wheelbase Data b,
- Step 2 When turning, the control system for turning and preventing the rollover of the vehicle obtains the wheel deflection angle ⁇ L and the left front wheel speed v L ,
- the controller is based on the following formula:
- ⁇ 1 is the angle between the rising section and the descending section connecting line and horizontal line of the front or rear two hydraulic cylinders
- ⁇ 2 is the angle between the line connecting the center of gravity and the horizontal line before and after the change of the center of gravity
- h 1 is the change of the center of gravity The distance from the front center of gravity to the front cross section of the two hydraulic cylinders
- ⁇ G′ ⁇ G′ is the angle between the changed center of gravity position G′ and the velocity instantaneous center O line and the wheel axis
- T G ( ⁇ 1 ) F G' (h 1 +h 2 - ⁇ h 1 )cos( ⁇ G' ),
- T G ( ⁇ 1 ) T is heavy ( ⁇ 1 ),
- c is the distance between the installation position of the hydraulic cylinder and the axis of symmetry of the vehicle
- Step three performing actions based on the output result of data processing module, the data control module performs four telescopic hydraulic cylinder stem extends, the center of gravity position of the vehicle body opposite to the change in value of the hydraulic cylinder lifting distance ⁇ h is greater than the critical distance lift ⁇ h Critical Theory .
- the grating ruler provides real-time feedback to the telescopic rods of the four hydraulic cylinders, and the controller performs real-time fine adjustment on the telescopic rods of the four hydraulic cylinders.
- the hydraulic cylinder lifting distance ⁇ h of the vehicle body opposite to the center of gravity position change value is less than the critical lifting distance ⁇ h threshold
- the controller sends a control signal to the instrument panel
- the instrument panel flashes an alarm
- the controller sends a signal to the vehicle body opposite to the center of gravity
- the detonating airbag with the position change value detonates the airbag.
- the substantial effect of the present invention is that by setting a special controller so that the vehicle travel speed is constant, the vehicle can be prevented from rolling prevention to improve the driving safety of the vehicle.
- the present invention has a positive effect in the process of vehicle rollover due to collision.
- FIG. 1 is a block diagram of a control method for turning and preventing rollover of a vehicle according to the present invention
- FIG. 2 is a schematic structural view of a vehicle having a turning anti-rollover system according to the present invention
- Figure 3 is a front elevational view of the vehicle having the turning anti-rollover system of the present invention.
- Figure 4 is a schematic view of the vehicle of Figure 3 when turning left;
- Figure 5 is a partial enlarged view of the hydraulic cylinder portion of the vehicle in the left turn of the present invention.
- Figure 6 is a partial enlarged view showing the change of the position of the center of gravity of the vehicle when the vehicle turns left in the present invention
- Figure 7 is a schematic diagram showing the mechanical analysis of the yaw angle measuring instrument and the rotational speed measuring instrument of the present invention installed in the left front wheel vehicle when turning left;
- Fig. 8 is a schematic diagram showing the mechanical analysis of the yaw measuring instrument and the rotational speed measuring instrument of the present invention installed when the right front wheel vehicle turns left.
- left rear wheel 1 left front wheel 2; right rear wheel 3; right front wheel 4.
- a control system for turning and preventing rollover of a vehicle (see FIGS. 1-8), powered by an automobile power supply, comprising a controller, four hydraulic cylinders, a declination measuring instrument, a rotational speed measuring instrument, and the controller is installed in the vehicle
- the data acquisition module, the data processing module and the data execution module are internally connected, and the data acquisition module and the data execution module are electrically connected to the data processing module, and the input end of the data acquisition module and the declination measuring instrument are respectively Electrically connected to the tachometer, the data is executed
- the output ends of the modules are respectively connected to the control ends of the four hydraulic cylinders, the declination measuring instrument is mounted on the left front wheel of the vehicle, and the rotational speed measuring instrument is mounted on the left front wheel of the vehicle, Two of the four hydraulic cylinders are respectively installed between the frame and the front axle, and the other two of the four hydraulic cylinders are installed between the frame and the rear axle, and the four hydraulic cylinders are symmetrically arranged two by two.
- the data execution module is electrically connected.
- the wheel declination measuring instrument is a wheel declination measuring instrument for monitoring the inclination of the vehicle and sensing the declination of the vehicle during the instantaneous turning
- the rotational speed measuring instrument is a rotational speed measuring instrument for monitoring the rotational speed of the wheel and sensing the speed during the running of the vehicle.
- the controller calculates a position change of the center of gravity of the current vehicle at the speed to compare with a safe center of gravity position change threshold at the vehicle speed, controls the hydraulic cylinder to act, and urges the vehicle body to rise a distance from the position change of the center of gravity.
- the controller is an ECU.
- the hydraulic cylinder is provided with a grating scale for measuring the extension distance of the hydraulic cylinder, and the output end of the grating is electrically connected to the data acquisition module.
- the invention relates to a control method for turning and preventing rollover of a vehicle, which is applicable to the foregoing control system for turning and preventing rollover of a vehicle, comprising the following steps:
- Step one manually set the existing parameters
- the existing parameters include the track and wheelbase, the standard body center position, the center of gravity position change safety threshold, and the standard body center position is composed of half track data and half wheelbase data.
- Step 2 When turning, the control system for turning and preventing the rollover of the car obtains the wheel deflection angle and the left front wheel speed.
- the controller is based on the following formula:
- ⁇ 1 is the angle between the rising section and the descending section connecting line and horizontal line of the front or rear two hydraulic cylinders
- ⁇ 2 is the angle between the line connecting the center of gravity and the horizontal line before and after the change of the center of gravity
- h 1 is the change of the center of gravity The distance from the front center of gravity to the front cross section of the two hydraulic cylinders
- ⁇ G' is the angle between the changed center of gravity position G' and the velocity instantaneous center O line and the wheel axis.
- T G ( ⁇ 1 ) F G' (h 1 +h 2 - ⁇ h 1 )cos( ⁇ G' ),
- T G ( ⁇ 1 ) T is heavy ( ⁇ 1 ),
- c is the distance between the installation position of the hydraulic cylinder and the axis of symmetry of the vehicle
- Step three performing actions based on the output result of data processing module, the data control module performs four telescopic hydraulic cylinder stem extends, the center of gravity position of the vehicle body opposite to the change in value of the hydraulic cylinder lifting distance ⁇ h is greater than the critical distance lift ⁇ h Critical Theory .
- the grating ruler provides real-time feedback to the telescopic rods of the four hydraulic cylinders, and the controller performs real-time fine adjustment on the telescopic rods of the four hydraulic cylinders.
- the controller sends a control signal to the instrument panel, the instrument panel flashes an alarm and detonates the airbag to detonate.
Abstract
Description
Claims (8)
- 一种汽车转弯防侧翻的控制系统,由汽车电源供电,其特征在于:包括控制器、四个液压油缸、偏角测量仪、转速测量仪,所述控制器安装在车辆内部包括数据采集模块、数据处理模块和数据执行模块,所述数据采集模块和数据执行模块均与所述的数据处理模块电连接,所述数据采集模块的输入端分别与所述偏角测量仪和转速测量仪电连接,所述数据执行模块的输出端分别与所述的四个液压油缸的控制端连接,所述偏角测量仪安装在车辆的左侧前轮上,转速测量仪则安装在车辆的左侧前轮上,所述四个液压油缸中两个分别安装在车架和前车桥之间,所述四个液压油缸中另外两个安装在车架和后车桥之间,所述四个液压油缸两两对称设置。
- 根据权利要求1所述的汽车转弯防侧翻的控制系统,其特征在于:所述车架和前车桥之间还设置有两个起爆气囊,所述车架和后车桥之间也设置有两个起爆气囊,所述四个起爆气囊的控制端均与所述的数据执行模块电连接。
- 根据权利要求1所述的汽车转弯防侧翻的控制系统,其特征在于:所述车轮偏角测量仪为监测车辆倾斜并感应车辆在瞬时转弯过程中的偏角θL的车轮偏角测量仪,所述转速测量仪为监测车轮转速并感应车辆行进过程中的速度vL的转速测量仪,所述控制器为计算当前车辆在速度vL下的重心G位置变化Δa,以与该车辆速度vL下的安全的重心G位置变化阈值比较,控制液压油缸动作,促使车身反向于重心G位置变化Δa抬升一段距离Δh,保证车辆安全行驶的控制器。
- 根据权利要求3所述的汽车转弯防侧翻的控制系统,其特征在于:所述 控制器为ECU。
- 根据权利要求3所述的汽车转弯防侧翻的控制系统,其特征在于:所述液压油缸上均设置有测量液压油缸伸展距离的光栅尺,所述光栅尺的输出端与数据采集模块电连接。
- 一种汽车转弯防侧翻的控制方法,适用于如权利要求5所述的汽车转弯防侧翻的控制系统,其特征在于包括以下步骤:步骤一,人工设定现有参数,现有参数包括轮距B和轴距L、标准车身中心位置G、重心G位置变化安全阈值,标准车身中心位置G由半轮距数据a和半轴距数据b构成,步骤二,在转弯时,汽车转弯防侧翻的控制系统获取车轮偏转角θL和左前轮速度vL,控制器根据下述公式:Δh1=Δa tan(|θ2|),其中,θ1为前或后面两个液压油缸上升断面和下降断面连线和水平线之间的夹角;θ2为重心变化前后重心所处位置连线与水平线间夹角;h1为重心变化前重心位置到前面两液压缸断面的距离;θG′为变化后的重心位置G′和速度瞬时中心O连线与轮轴线的夹角,算出汽车重心处的速度vG′,向心力FG′:根据上述数据算出汽车车轴方向上的向心力矩为TG(θ1)=FG'(h1+h2-Δh1)cos(θG')当汽车转弯侧翻时,内侧车轮要离开地面;此时汽车翻转扭矩为由力的平衡可得TG(θ1)=T重(θ1),最终得出临界抬升距离Δh临界Δh临界=c tan(θ1),c为液压缸安装位置到车辆对称轴线间的距离;步骤三,执行动作,根据数据处理模块的输出结果,数据执行模块控制四个液压油缸的伸缩杆伸出,使车身反向于重心位置变化值的液压油缸抬升 距离Δh大于理论临界抬升距离Δh临界。
- 根据权利要6所述的汽车转弯防侧翻的控制方法,其特征在于:所述光栅尺对四个液压油缸的伸缩杆进行实时反馈,控制器对四个液压油缸的伸缩杆进行实时微调。
- 根据权利要7所述的汽车转弯防侧翻的控制方法,其特征在于:若车身反向于重心位置变化值的液压油缸抬升距离Δh小于临界抬升距离Δh临界,则控制器发出控制信号至仪表盘,仪表盘闪烁报警并起爆气囊起爆。
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