CN112477853A - Vehicle longitudinal-vertical integrated control system and method equipped with non-inflatable wheels - Google Patents

Vehicle longitudinal-vertical integrated control system and method equipped with non-inflatable wheels Download PDF

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Publication number
CN112477853A
CN112477853A CN202011253304.0A CN202011253304A CN112477853A CN 112477853 A CN112477853 A CN 112477853A CN 202011253304 A CN202011253304 A CN 202011253304A CN 112477853 A CN112477853 A CN 112477853A
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hub motor
vehicle
controller
vertical
force
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CN112477853B (en
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林棻
蔡亦璋
王少博
钱程亮
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C7/00—Non-inflatable or solid tyres
    • B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/20—Reducing vibrations in the driveline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W2050/0001—Details of the control system
    • B60W2050/0019—Control system elements or transfer functions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W2050/0001—Details of the control system
    • B60W2050/0019—Control system elements or transfer functions
    • B60W2050/0028—Mathematical models, e.g. for simulation
    • B60W2050/0031—Mathematical model of the vehicle

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Human Computer Interaction (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention discloses a vehicle longitudinal-vertical integrated control system and method provided with a non-pneumatic wheel, wherein the vehicle is provided with a non-pneumatic elastic wheel driven by a hub motor, and the longitudinal-vertical control system comprises an electronic accelerator, a vehicle inertial sensor, a vehicle speed sensor, a gyroscope, an active suspension controller, a tire force distribution controller, four hub motor controllers and four hub motors. The body active suspension controller is used to achieve the desired longitudinal force, vertical force and pitch moment. The tire force distribution controller distributes the force in a manner that minimizes the tire load rate. The control system and the control method provided by the invention can ensure that the vehicle body generates continuous vertical acceleration due to actions such as acceleration or braking and the like when the vehicle runs at a high speed, so that pitching motion is reduced as much as possible, and the vehicle is prevented from generating large attitude change under the conditions so as to cause safety accidents caused by vehicle instability.

Description

Vehicle longitudinal-vertical integrated control system and method equipped with non-inflatable wheels
Technical Field
The invention relates to the technical field of automobile tire safety and intelligent control, in particular to a vehicle vertical-vertical integrated control system and method with non-inflatable wheels.
Background
The safety of tires is an important issue for vehicle safety research, and when a tire burst occurs while a vehicle is running at a high speed, the death rate of passengers is quite high. Therefore, the proposal of a novel safety tire is urgent. The non-inflatable elastic wheel (NPEW) adopts a non-inflatable structure, so that the risk of tire burst is avoided.
The distributed driving electric automobile is taken as an important branch of the development of the electromotion direction, and the torque of each driving wheel is independently controllable, which brings great advantages to the dynamic control of the vehicle chassis. At this stage, most chassis control studies are longitudinal-lateral stability control. However, the integrated control of the sagittal perpendicularity is rarely studied. Therefore, in this background, NPEW is assembled on a distributed drive electric vehicle, the motion effect of the distributed drive electric vehicle under the longitudinal-vertical integrated control is researched, and it is very meaningful to design a novel chassis control system with high performance.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a vehicle vertical-vertical integrated control system and method provided with non-inflatable wheels so as to improve the safety performance of an automobile under the conditions of acceleration and braking during high-speed running.
The invention adopts the following technical scheme for solving the technical problems:
a vehicle longitudinal-vertical integrated control system equipped with non-inflatable wheels, wherein four tires of the vehicle are all non-inflatable elastic wheels, and the longitudinal-vertical integrated control system comprises an electronic throttle, a vehicle inertial sensor, a vehicle speed sensor, a gyroscope, an active suspension controller, a tire force distribution controller, a left front hub motor controller, a left rear hub motor controller, a right front hub motor controller, a right rear hub motor controller, a left front hub motor, a left rear hub motor, a right front hub motor and a right rear hub motor;
the electronic throttle is used for transmitting the acceleration of the vehicle to the active suspension controller;
the vehicle speed sensor is used for measuring longitudinal vehicle speed and transmitting the longitudinal vehicle speed to the active suspension controller;
the vehicle inertial sensor is used for measuring the vertical speed and the vertical acceleration of the electric vehicle in real time and transmitting the vertical speed and the vertical acceleration to the active suspension controller;
the gyroscope is used for measuring the pitch angle speed of the vehicle in real time and transmitting the pitch angle speed to the active suspension controller;
the active suspension controller is respectively connected with the electronic throttle, the vehicle inertial sensor, the vehicle speed sensor, the gyroscope and the tire force distribution controller through a CAN bus, and is used for calculating total longitudinal force, total vertical force and total pitching moment expected by the electric vehicle according to the sensing data of the electronic throttle, the vehicle inertial sensor, the vehicle speed sensor and the gyroscope and transmitting the total longitudinal force, the total vertical force and the total pitching moment to the tire force distribution controller;
the tire force distribution controller is respectively connected with the left front wheel hub motor controller, the left rear wheel hub motor controller, the right front wheel hub motor controller and the right rear wheel hub motor controller through CAN buses and is used for controlling the left front wheel hub motor controller, the left rear wheel hub motor controller, the right front wheel hub motor controller and the right rear wheel hub motor controller to work according to the received total longitudinal force, total vertical force and total pitching moment expected by the electric automobile;
the left front hub motor controller, the left rear hub motor controller, the right front hub motor controller and the right rear hub motor controller are respectively connected with the left front hub motor, the left rear hub motor, the right front hub motor and the right rear hub motor in a one-to-one correspondence manner and are respectively used for controlling the left front hub motor, the left rear hub motor, the right front hub motor and the right rear hub motor to work;
the left front wheel hub motor, the left rear wheel hub motor, the right front wheel hub motor and the right rear wheel hub motor are respectively arranged on a left front wheel, a left rear wheel, a right front wheel and a right rear wheel of the electric automobile in a one-to-one correspondence mode.
As a further optimization scheme of the non-pneumatic wheel-equipped vehicle vertical-vertical integrated control system of the invention, the active suspension controller comprises a longitudinal force controller, a vertical force controller and a pitch moment controller, wherein the longitudinal force controller is used for calculating a desired total longitudinal force, the vertical force controller is used for calculating a desired total vertical force, and the pitch moment controller is used for calculating a desired total pitch moment;
the longitudinal force controller, the vertical force controller and the pitching moment controller are all sliding mode controllers.
As a further optimization scheme of the vehicle vertical-vertical integrated control system provided with the non-inflatable wheels, the sliding mode controller adopts a terminal sliding mode controller, a linear saturation function is selected by a trend law, a boundary layer is adopted to weaken buffeting influence, a boundary layer is arranged near a zero value, and a sign function sgn(s) is replaced by a continuous saturation function sat(s) in the boundary layer.
The invention also discloses a control method of the vehicle vertical-vertical integrated control system with the non-inflatable wheels, which comprises the following steps:
step 1), establishing a vehicle dynamic model, taking the pitching, longitudinal and vertical motions of a vehicle into consideration, obtaining the acceleration of the vehicle through an electronic accelerator, obtaining the longitudinal speed through a vehicle speed sensor, feeding back the vertical speed and the vertical acceleration in real time through an automotive inertial sensor, and feeding back the pitch angle speed of the vehicle in real time through a gyroscope;
Figure BDA0002772317690000021
wherein m is the body mass of the electric automobile; u is the longitudinal speed of the electric vehicle;
Figure BDA0002772317690000022
is the longitudinal acceleration of the electric vehicle; u. ofzIs the vertical speed of the electric automobile, theta is the pitch angle of the electric automobile;
Figure BDA0002772317690000023
is the pitch angle speed of the electric vehicle; fxiI is 1,2,3,4 respectivelyThe longitudinal force of the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the electric automobile;
Figure BDA0002772317690000024
in the formula (I), the compound is shown in the specification,
Figure BDA0002772317690000031
is the vertical acceleration of the electric vehicle; fziI is the vertical force of the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the electric automobile respectively; g is the acceleration of gravity;
Figure BDA0002772317690000032
in the formula IyThe pitch moment of inertia of the electric automobile;
Figure BDA0002772317690000033
is the pitch angle acceleration of the electric vehicle; a is the wheelbase of the front axle of the electric automobile, and b is the wheelbase of the rear axle of the electric automobile;
step 2), outputting the total longitudinal force F expected by the electric automobile through the longitudinal force controller, the vertical force controller and the pitching moment controller respectivelyxdTotal vertical force FzdTotal pitching moment Myd：
Figure BDA0002772317690000034
Figure BDA0002772317690000035
Figure BDA0002772317690000036
Wherein s is1＝u-ud，s2＝uz-uzd，
Figure BDA0002772317690000037
sat () is the saturation function, η1,η2,φ1,φ2,α3,β3,p3,q3For controlling a parameter, wherein1、η2Respectively preset for influencing the desired longitudinal force FxdVertical force FzdA parameter of convergence speed; phi is a1、φ2Respectively preset for influencing the desired longitudinal force FxdDesired vertical force FzdThe parameter of the amplitude of buffeting, the larger the value thereof, to FxdAnd FzdThe stronger the buffeting suppression capability is, but the approach speed is correspondingly reduced; alpha is alpha3、β3Respectively, slip form surface s3Pitch angle error term coefficient, pitch angle velocity error term coefficient; p is a radical of3、q3Respectively, slip form surface s3Numerator and denominator of index of pitch angle speed error term for parameter influence system convergence speed, p3＞q3And 1 < p3/q3＜21＜p3/q3＜2；
Step 3), distributing the total longitudinal force, the total vertical force and the total pitching moment expected by the electric automobile to four wheels through a tire force distribution controller, wherein the tire vertical force distribution adopts the following performance indexes:
Figure BDA0002772317690000038
wherein epsiloniI is 1,2,3 and 4, which are vertical dynamic coefficients of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of the electric automobile respectively,
Figure BDA0002772317690000039
Fzi,0i is 1,2,3 and 4, which are vertical static loads of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of the electric automobile respectively;
the tire longitudinal force adopts a shaft distribution strategy to output the target torque of each hub motor:
Fx＝Fx1+Fx2+Fx3+Fx4
in the formula, FxThe total longitudinal force of the electric automobile;
Figure BDA0002772317690000041
in the formula, FzfThe vertical force of the front axle of the electric automobile; fzrThe vertical force of the rear axle of the electric automobile;
Figure BDA0002772317690000042
Figure BDA0002772317690000043
the longitudinal forces of the left front wheel and the right front wheel of the electric automobile are equal, and the longitudinal forces of the left rear wheel and the right rear wheel are also equal, and the method comprises the following steps of
Figure BDA0002772317690000044
Figure BDA0002772317690000045
Figure BDA0002772317690000046
Thus, the total drive torque is Ti＝Fxir。
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the invention provides a vertical-vertical integrated control system and a vertical-vertical integrated control method, wherein a terminal sliding mode controller and an approach law are adopted, so that buffeting can be effectively eliminated, robustness is improved, and the safety performance of a vehicle under high-speed working conditions such as acceleration or braking can be improved. The assembled cost-charged elastic wheel can effectively prevent the danger caused by tire burst when the wheel runs at high speed.
Drawings
FIG. 1 is a schematic diagram of a control system of the present invention;
FIG. 2 is a schematic diagram of the overall control method of the present invention.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
As shown in fig. 1, the invention discloses a vehicle longitudinal-vertical integrated control system equipped with non-pneumatic wheels, wherein four tires of the vehicle are all non-pneumatic elastic wheels, and the longitudinal-vertical integrated control system comprises an electronic accelerator, a vehicle inertial sensor, a vehicle speed sensor, a gyroscope, an active suspension controller, a tire force distribution controller, a left front hub motor controller, a left rear hub motor controller, a right front hub motor controller, a right rear hub motor controller, a left front hub motor, a left rear hub motor, a right front hub motor and a right rear hub motor;
the electronic throttle is used for transmitting the acceleration of the vehicle to the active suspension controller;
the vehicle speed sensor is used for measuring longitudinal vehicle speed and transmitting the longitudinal vehicle speed to the active suspension controller;
the vehicle inertial sensor is used for measuring the vertical speed and the vertical acceleration of the electric vehicle in real time and transmitting the vertical speed and the vertical acceleration to the active suspension controller;
the gyroscope is used for measuring the pitch angle speed of the vehicle in real time and transmitting the pitch angle speed to the active suspension controller;
the active suspension controller is respectively connected with the electronic throttle, the vehicle inertial sensor, the vehicle speed sensor, the gyroscope and the tire force distribution controller through a CAN bus, and is used for calculating total longitudinal force, total vertical force and total pitching moment expected by the electric vehicle according to the sensing data of the electronic throttle, the vehicle inertial sensor, the vehicle speed sensor and the gyroscope and transmitting the total longitudinal force, the total vertical force and the total pitching moment to the tire force distribution controller;
the tire force distribution controller is respectively connected with the left front wheel hub motor controller, the left rear wheel hub motor controller, the right front wheel hub motor controller and the right rear wheel hub motor controller through CAN buses and is used for controlling the left front wheel hub motor controller, the left rear wheel hub motor controller, the right front wheel hub motor controller and the right rear wheel hub motor controller to work according to the received total longitudinal force, total vertical force and total pitching moment expected by the electric automobile;
the left front hub motor controller, the left rear hub motor controller, the right front hub motor controller and the right rear hub motor controller are respectively connected with the left front hub motor, the left rear hub motor, the right front hub motor and the right rear hub motor in a one-to-one correspondence manner and are respectively used for controlling the left front hub motor, the left rear hub motor, the right front hub motor and the right rear hub motor to work;
the left front wheel hub motor, the left rear wheel hub motor, the right front wheel hub motor and the right rear wheel hub motor are respectively arranged on a left front wheel, a left rear wheel, a right front wheel and a right rear wheel of the electric automobile in a one-to-one correspondence mode.
As shown in fig. 2, the active suspension controller includes a longitudinal force controller for calculating a desired total longitudinal force, a vertical force controller for calculating a desired total vertical force, and a pitch moment controller for calculating a desired total pitch moment;
the longitudinal force controller, the vertical force controller and the pitching moment controller are all sliding mode controllers.
The tire force distribution controller adopts a performance index based on vertical dynamic load to minimize variance in order to ensure that the vertical force of each wheel is the same as possible with the static load of each wheel and avoid overlarge displacement of a suspension.
The sliding mode controller adopts a terminal sliding mode controller, a linear saturation function is selected by a trend law, a boundary layer is adopted to weaken buffeting influence, a boundary layer is arranged near a zero value, and a sign function sgn(s) is replaced by a continuous saturation function sat(s) in the boundary layer.
The invention also discloses a control method of the vehicle vertical-vertical integrated control system with the non-inflatable wheels, which comprises the following steps:
step 1), establishing a vehicle dynamic model, taking the pitching, longitudinal and vertical motions of a vehicle into consideration, obtaining the acceleration of the vehicle through an electronic accelerator, obtaining the longitudinal speed through a vehicle speed sensor, feeding back the vertical speed and the vertical acceleration in real time through an automotive inertial sensor, and feeding back the pitch angle speed of the vehicle in real time through a gyroscope;
Figure BDA0002772317690000061
wherein m is the body mass of the electric automobile; u is the longitudinal speed of the electric vehicle;
Figure BDA0002772317690000062
is the longitudinal acceleration of the electric vehicle; u. ofzIs the vertical speed of the electric automobile, theta is the pitch angle of the electric automobile;
Figure BDA0002772317690000063
is the pitch angle speed of the electric vehicle; fxiI is the longitudinal force of the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the electric automobile respectively;
Figure BDA0002772317690000064
in the formula (I), the compound is shown in the specification,
Figure BDA0002772317690000065
is the vertical acceleration of the electric vehicle; fzi,i＝1,23,4 are vertical forces of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of the electric automobile respectively; g is the acceleration of gravity;
Figure BDA0002772317690000066
in the formula IyThe pitch moment of inertia of the electric automobile;
Figure BDA0002772317690000067
is the pitch angle acceleration of the electric vehicle; a is the wheelbase of the front axle of the electric automobile, and b is the wheelbase of the rear axle of the electric automobile;
step 2), outputting the total longitudinal force F expected by the electric automobile through the longitudinal force controller, the vertical force controller and the pitching moment controller respectivelyxdTotal vertical force FzdTotal pitching moment Myd：
Figure BDA0002772317690000068
Figure BDA0002772317690000069
Figure BDA00027723176900000610
Wherein s is1＝u-ud，s2＝uz-uzd，
Figure BDA00027723176900000611
sat () is the saturation function, η1,η2,φ1,φ2,α3,β3,p3,q3For controlling a parameter, wherein1、η2Respectively preset for influencing the desired longitudinal force FxdVertical force FzdA parameter of convergence speed; phi is a1、φ2Are respectively presetFor influencing the desired longitudinal force FxdDesired vertical force FzdThe parameter of the amplitude of buffeting, the larger the value thereof, to FxdAnd FzdThe stronger the buffeting suppression capability is, but the approach speed is correspondingly reduced; alpha is alpha3、β3Respectively, slip form surface s3Pitch angle error term coefficient, pitch angle velocity error term coefficient; p is a radical of3、q3Respectively, slip form surface s3Numerator and denominator of index of pitch angle speed error term for parameter influence system convergence speed, p3＞q3And 1 < p3/q3＜21＜p3/q3＜2，p3、q3The parameters need to be adjusted within the range according to actual conditions; the control parameters are adjusted according to experience;
a linear saturation function is adopted as an approach law of the sliding mode surfaces s1 and s 2:
Figure BDA0002772317690000071
wherein j is 1,2,
Figure BDA0002772317690000072
is a slip form surface sjThe result after differentiation;
Figure BDA0002772317690000073
using non-linear functions as slip-form surfaces s3Approximation law:
Figure BDA0002772317690000074
the stability was demonstrated by constructing the lyapunov function:
Figure BDA0002772317690000075
Figure BDA0002772317690000076
Figure BDA0002772317690000077
step 3), distributing the total longitudinal force, the total vertical force and the total pitching moment expected by the electric automobile to four wheels through a tire force distribution controller, wherein the tire vertical force distribution adopts the following performance indexes:
Figure BDA0002772317690000078
wherein epsiloniI is 1,2,3 and 4, which are vertical dynamic coefficients of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of the electric automobile respectively,
Figure BDA0002772317690000079
Fzi,0i is 1,2,3 and 4, which are vertical static loads of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of the electric automobile respectively;
the distribution of vertical forces to the tire should also be limited by various constraints
Figure BDA0002772317690000081
s.t.Fx＝Fx1+Fx2+Fx3+Fx4,
Fz＝Fz1+Fz2+Fz3+Fz4,
My＝-a(Fz1+Fz2)+b(Fz3+Fz4),
-Ti,max≤Fxi·r≤Ti,max,
Fzi≥0
The feed-forward control of the longitudinal force may be obtained by the dynamics of the vehicle:
Fx＝Fx1+Fx2+Fx3+Fx4
in the formula, FxThe total longitudinal force of the electric automobile;
Figure BDA0002772317690000082
in the formula, FzfThe vertical force of the front axle of the electric automobile; fzrThe vertical force of the rear axle of the electric automobile;
Figure BDA0002772317690000083
Figure BDA0002772317690000084
the longitudinal forces of the left front wheel and the right front wheel of the electric automobile are equal, and the longitudinal forces of the left rear wheel and the right rear wheel are also equal, and the electric automobile comprises
Figure BDA0002772317690000085
Thus, the total drive torque is Ti＝Fxir。
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. The vehicle longitudinal-vertical integrated control system is provided with non-inflatable wheels, and four tires of the vehicle are non-inflatable elastic wheels, and is characterized in that the longitudinal-vertical integrated control system comprises an electronic throttle, a vehicle inertial sensor, a vehicle speed sensor, a gyroscope, an active suspension controller, a tire force distribution controller, a left front hub motor controller, a left rear hub motor controller, a right front hub motor controller, a right rear hub motor controller, a left front hub motor, a left rear hub motor, a right front hub motor and a right rear hub motor;
the electronic throttle is used for transmitting the acceleration of the vehicle to the active suspension controller;
the vehicle speed sensor is used for measuring longitudinal vehicle speed and transmitting the longitudinal vehicle speed to the active suspension controller;
the vehicle inertial sensor is used for measuring the vertical speed and the vertical acceleration of the electric vehicle in real time and transmitting the vertical speed and the vertical acceleration to the active suspension controller;
the gyroscope is used for measuring the pitch angle speed of the vehicle in real time and transmitting the pitch angle speed to the active suspension controller;
the active suspension controller is respectively connected with the electronic throttle, the vehicle inertial sensor, the vehicle speed sensor, the gyroscope and the tire force distribution controller through a CAN bus, and is used for calculating total longitudinal force, total vertical force and total pitching moment expected by the electric vehicle according to the sensing data of the electronic throttle, the vehicle inertial sensor, the vehicle speed sensor and the gyroscope and transmitting the total longitudinal force, the total vertical force and the total pitching moment to the tire force distribution controller;
the tire force distribution controller is respectively connected with the left front wheel hub motor controller, the left rear wheel hub motor controller, the right front wheel hub motor controller and the right rear wheel hub motor controller through CAN buses and is used for controlling the left front wheel hub motor controller, the left rear wheel hub motor controller, the right front wheel hub motor controller and the right rear wheel hub motor controller to work according to the received total longitudinal force, total vertical force and total pitching moment expected by the electric automobile;
the left front hub motor controller, the left rear hub motor controller, the right front hub motor controller and the right rear hub motor controller are respectively connected with the left front hub motor, the left rear hub motor, the right front hub motor and the right rear hub motor in a one-to-one correspondence manner and are respectively used for controlling the left front hub motor, the left rear hub motor, the right front hub motor and the right rear hub motor to work;
the left front wheel hub motor, the left rear wheel hub motor, the right front wheel hub motor and the right rear wheel hub motor are respectively arranged on a left front wheel, a left rear wheel, a right front wheel and a right rear wheel of the electric automobile in a one-to-one correspondence mode.
2. The non-pneumatic wheel equipped vehicle vertical-vertical integrated control system of claim 1, wherein the active suspension controller comprises a longitudinal force controller for calculating a desired total longitudinal force, a vertical force controller for calculating a desired total vertical force, and a pitch moment controller for calculating a desired total pitch moment;
the longitudinal force controller, the vertical force controller and the pitching moment controller are all sliding mode controllers.
3. The integrated control system for longitudinal-vertical motion of a vehicle equipped with a non-pneumatic wheel as claimed in claim 2, wherein the sliding mode controller adopts a terminal sliding mode controller, the approach law selects a linear saturation function, the boundary layer is adopted to weaken buffeting influence, a boundary layer is arranged near a zero value, and the sign function sgn(s) is replaced by a continuous saturation function sat(s) in the boundary layer.
4. The control method of the integrated vertical-vertical control system for a vehicle equipped with a non-pneumatic wheel as set forth in claim 3, characterized by comprising the steps of:
step 1), establishing a vehicle dynamic model, taking the pitching, longitudinal and vertical motions of a vehicle into consideration, obtaining the acceleration of the vehicle through an electronic accelerator, obtaining the longitudinal speed through a vehicle speed sensor, feeding back the vertical speed and the vertical acceleration in real time through an automotive inertial sensor, and feeding back the pitch angle speed of the vehicle in real time through a gyroscope;
Figure FDA0002772317680000021
wherein m is the body mass of the electric automobile; u is the longitudinal speed of the electric vehicle;
Figure FDA0002772317680000022
is the longitudinal acceleration of the electric vehicle; u. ofzIs the vertical speed of the electric automobile, theta is the pitch angle of the electric automobile;
Figure FDA0002772317680000023
is the pitch angle speed of the electric vehicle; fxiI is the longitudinal force of the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the electric automobile respectively;
Figure FDA0002772317680000024
in the formula (I), the compound is shown in the specification,
Figure FDA0002772317680000025
is the vertical acceleration of the electric vehicle; fziI is the vertical force of the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the electric automobile respectively; g is the acceleration of gravity;
Figure FDA0002772317680000026
in the formula IyThe pitch moment of inertia of the electric automobile;
Figure FDA0002772317680000027
is the pitch angle acceleration of the electric vehicle; a is the wheelbase of the front axle of the electric automobile, and b is the wheelbase of the rear axle of the electric automobile;
step 2), outputting the total longitudinal force F expected by the electric automobile through the longitudinal force controller, the vertical force controller and the pitching moment controller respectivelyxdTotal vertical force FzdTotal pitching moment Myd：
Figure FDA00027723176800000211
Figure FDA0002772317680000028
Figure FDA0002772317680000029
Wherein s is1＝u-ud，s2＝uz-uzd，
Figure FDA00027723176800000210
sat () is the saturation function, η1,η2,φ1,φ2,α3,β3,p3,q3For controlling a parameter, wherein1、η2Respectively preset for influencing the desired longitudinal force FxdVertical force FzdA parameter of convergence speed; phi is a1、φ2Respectively preset for influencing the desired longitudinal force FxdDesired vertical force FzdA parameter of buffeting amplitude; alpha is alpha3、β3Respectively, slip form surface s3Pitch angle error term coefficient, pitch angle velocity error term coefficient; p is a radical of3、q3Respectively, slip form surface s3Numerator and denominator of index of pitch angle speed error term for parameter shadowConvergence speed of the system, p3＞q3And 1 < p3/q3＜21＜p3/q3＜2；
Step 3), distributing the total longitudinal force, the total vertical force and the total pitching moment expected by the electric automobile to four wheels through a tire force distribution controller, wherein the tire vertical force distribution adopts the following performance indexes:
Figure FDA0002772317680000031
wherein epsiloniI is 1,2,3 and 4, which are vertical dynamic coefficients of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of the electric automobile respectively,
Figure FDA0002772317680000032
Fzi,0i is 1,2,3 and 4, which are vertical static loads of a left front wheel, a right front wheel, a left rear wheel and a right rear wheel of the electric automobile respectively;
the tire longitudinal force adopts a shaft distribution strategy to output the target torque of each hub motor:
Fx＝Fx1+Fx2+Fx3+Fx4
in the formula, FxThe total longitudinal force of the electric automobile;
Figure FDA0002772317680000033
in the formula, FzfThe vertical force of the front axle of the electric automobile; fzrThe vertical force of the rear axle of the electric automobile;
Figure FDA0002772317680000034
Figure FDA0002772317680000035
the longitudinal forces of the left front wheel and the right front wheel of the electric automobile are equal, and the longitudinal forces of the left rear wheel and the right rear wheel are also equal, and the method comprises the following steps of
Figure FDA0002772317680000036
Figure FDA0002772317680000037
Figure FDA0002772317680000038
Thus, the total drive torque is Ti＝Fxir。
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Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5276621A (en) * 1991-05-20 1994-01-04 General Motors Corporation Quarter car variable force suspension system control
US20040088059A1 (en) * 2000-04-25 2004-05-06 Georgia Tech Reseach Corporation Adaptive control system having hedge unit and related apparatus and methods
CN102582416A (en) * 2012-02-16 2012-07-18 吉林大学 Full line control electric vehicle with variable kinetic characteristics
CN102975714A (en) * 2012-11-19 2013-03-20 北京工业大学 Electric vehicle chassis system and collaborative control method thereof
CN103448716A (en) * 2013-09-12 2013-12-18 清华大学 Longitudinal-transverse-vertical force cooperative control method of distributed electrically driven vehicle
CN105109477A (en) * 2015-09-09 2015-12-02 北京理工大学 Torque distributing method for in-wheel-motor driven vehicles
CN106427957A (en) * 2015-08-11 2017-02-22 比亚迪股份有限公司 Stabilization control system and stabilization control method based on four-wheel drive for electric vehicle, as well as electric vehicle
CN107215329A (en) * 2017-05-10 2017-09-29 江苏大学 A kind of distributed-driving electric automobile lateral stability control method based on ATSM
CN107791773A (en) * 2017-09-04 2018-03-13 昆明理工大学 A kind of vehicle active suspension system vibration control method based on regulation performance function
CN108216363A (en) * 2018-02-05 2018-06-29 南京航空航天大学 A kind of electric wheel truck chassis integrated system and its multidisciplinary design optimization method
CN109204317A (en) * 2018-07-24 2019-01-15 吉林大学 Wheel hub drives electric car longitudinal and transverse and vertical force integrated control optimization method
CN109552312A (en) * 2018-11-14 2019-04-02 吉林大学 Intact stability model predictive control method
CN110281723A (en) * 2018-03-19 2019-09-27 丰田自动车株式会社 The posture control device of vehicle
EP3620352A1 (en) * 2017-05-04 2020-03-11 DALU Robotech, Technology (Beijing) Co., Ltd. Wheeled movement chassis
CA3112415A1 (en) * 2018-09-10 2020-03-19 Yanshan University Inertial regulation active suspension system based on vehicle posture deviation, and control method thereof
CN111731267A (en) * 2020-06-02 2020-10-02 南京航空航天大学 Distributed electric vehicle stability control system and method equipped with non-inflatable elastic wheels

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5276621A (en) * 1991-05-20 1994-01-04 General Motors Corporation Quarter car variable force suspension system control
US20040088059A1 (en) * 2000-04-25 2004-05-06 Georgia Tech Reseach Corporation Adaptive control system having hedge unit and related apparatus and methods
CN102582416A (en) * 2012-02-16 2012-07-18 吉林大学 Full line control electric vehicle with variable kinetic characteristics
CN102975714A (en) * 2012-11-19 2013-03-20 北京工业大学 Electric vehicle chassis system and collaborative control method thereof
CN103448716A (en) * 2013-09-12 2013-12-18 清华大学 Longitudinal-transverse-vertical force cooperative control method of distributed electrically driven vehicle
CN106427957A (en) * 2015-08-11 2017-02-22 比亚迪股份有限公司 Stabilization control system and stabilization control method based on four-wheel drive for electric vehicle, as well as electric vehicle
CN105109477A (en) * 2015-09-09 2015-12-02 北京理工大学 Torque distributing method for in-wheel-motor driven vehicles
EP3620352A1 (en) * 2017-05-04 2020-03-11 DALU Robotech, Technology (Beijing) Co., Ltd. Wheeled movement chassis
CN107215329A (en) * 2017-05-10 2017-09-29 江苏大学 A kind of distributed-driving electric automobile lateral stability control method based on ATSM
CN107791773A (en) * 2017-09-04 2018-03-13 昆明理工大学 A kind of vehicle active suspension system vibration control method based on regulation performance function
CN108216363A (en) * 2018-02-05 2018-06-29 南京航空航天大学 A kind of electric wheel truck chassis integrated system and its multidisciplinary design optimization method
CN110281723A (en) * 2018-03-19 2019-09-27 丰田自动车株式会社 The posture control device of vehicle
CN109204317A (en) * 2018-07-24 2019-01-15 吉林大学 Wheel hub drives electric car longitudinal and transverse and vertical force integrated control optimization method
CA3112415A1 (en) * 2018-09-10 2020-03-19 Yanshan University Inertial regulation active suspension system based on vehicle posture deviation, and control method thereof
CN109552312A (en) * 2018-11-14 2019-04-02 吉林大学 Intact stability model predictive control method
CN111731267A (en) * 2020-06-02 2020-10-02 南京航空航天大学 Distributed electric vehicle stability control system and method equipped with non-inflatable elastic wheels

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
刘震涛等: "基于车辆稳定性的轮胎力优化分配研究", 《机电工程》 *
张俊辉: "基于改进饱和函数的滑模控制器研究及应用", 《中国优秀硕士学位论文全文数据库电子期刊信息科技辑》 *
曹坤等: "分布式电驱动车辆纵-横-垂向力协同控制", 《汽车工程》 *
赵海滨等: "基于不同趋近律的滑模控制仿真实验", 《科技创新导报》 *
黄锡超等: "四轮独立驱动电动汽车直线行驶稳定协调控制", 《重庆理工大学学报(自然科学)》 *

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