CN102303490B - Automobile tire burst prevention controller on basis of electrical power steering - Google Patents

Abstract

The present invention is based on electric steering automobile run-flat tire controller, relates to automobile safety control device, including ECU processor, data acquisition part, data processing part, tire burst display part, tire burst alarm part, motor steering control part, power supply circuit, The upper communication circuit and the fault diagnosis circuit, when a tire blows out, start the tire blowout alarm part and display the tire blowout information through the tire blowout display part, and detect whether the steering wheel is turning or not, and the direction and angle of the steering wheel turning through the data acquisition part. The steering system of the car is directly controlled by the motor steering control part to enter the run-flat tire control. If the steering wheel has steering, the steering direction, steering angle and steering speed information of the steering wheel must be detected to provide parameters for correcting the steering deflection angle, and then the motor steering control Partially controls the steering system of the car. By controlling the steering system of the car, the car will keep moving in the original driving direction after the tire blows out, so as to avoid running out of control when the tire blows out.

Description

Automobile run-flat tire controller based on electric steering

technical field

The invention relates to an automobile safety control device, in particular to an automobile run-flat tire controller. the

Background technique

When a car tire suddenly blows out, it is easy to run out of control and deviate, causing casualties and property damage accidents. For this reason, the industry has conducted in-depth research on the control technology of car run-flat tires. At present, there are mainly the following kinds of car run-proof tire control technologies: (1) Ultra-flat Tire technology, the core of this technology is to reduce the height of the car tire as much as possible and enhance the support stiffness of the sidewall of the car tire, so that the height of the wheel does not drop significantly after the tire blows out, so as to provide the tire with a relatively low-speed basic driving Performance, the original intention of this technology is to remove the spare tire of the car, not to prevent the car from blowing out, and this technology does not have the function of early warning and rescue after the tire blows out. The adhesion decreases during driving. To improve the driving adhesion, it must be realized by increasing the width of the tire, and the reduction of the tire height will make it difficult to disassemble the tire. Therefore, the application prospect of this technology has yet to be demonstrated; (2) Direction self-locking technology, the core idea of this technology is to use the tire pressure sensor to detect the tire pressure information of the car tire. When a tire blowout is detected, the steering wheel will be unidirectionally self-locked. At this time, the driver can control it freely. Steering wheel, the self-locking steering wheel can reduce the direction deviation after the tire blows out, but this technology is mainly on the surface, it is still in the experimental stage, it has not been put into use so far, and there is no early warning after the tire blows out Early warning and rescue function; (3) Coaxial tire pressure communication technology, the core idea of this technology is to make the air chambers of the left and right wheels of the coaxial tire communicate, so that when the tire on one side of the coaxial tire blows out, the other side The air in the tire will be quickly transmitted to the punctured tire, so that the car will not deviate due to the excessive rolling resistance of one tire after the puncture, thereby reducing the possibility of causing a puncture accident; some companies have also proposed a similar Another method of technology, that is, after detecting a tire blowout on one side, quickly detonate the tire on the other side, which is very similar to the mechanism of this technology, and the reliability of this method is still under further verification; (4) Tire blowout monitoring and safety control system. The core of this technology is to use high-precision intelligent sensors to detect the air pressure information of automobile tires. If a tire blowout is detected, the blowout signal will be transmitted to the central processing unit immediately. The processing unit will control the automatic braking mechanism to brake, decelerate and brake. However, during the braking process, the lateral adhesion performance of the car will deteriorate, that is, the directional stability of the car is not good, so excessive braking and deceleration cannot be performed. the

From the above analysis, it can be seen that the current run-flat tire control technology is either costly or poor in reliability or the technology is not mature enough, and there are not too many popularization and application in the market. the

Contents of the invention

The purpose of the present invention is to overcome and solve the shortcoming and problem that existing automobiles are easy to get out of control and run off when the automobile tire suddenly bursts due to the lack of a perfect tire blowout anti-deviation device, causing casualties and property damage accidents. The electric steering car run-flat tire controller can reliably and effectively prevent the car from running off when the car is driving at a medium or high speed and suddenly blows out, and automatically maintain the car in the original driving direction to ensure the safety of the car and prevent Casualties and property damage accidents occurred. the

The technical scheme that the present invention adopts for reaching above-mentioned purpose of the invention is: a kind of automobile run-flat tire controller based on electric steering, the hardware of this automobile run-flat tire controller comprises ECU processor (the ATmega128 single-chip microcomputer that automobile run-flat tire controller uses is called here As "ECU processor"), data acquisition part, data processing part, tire burst display part, tire burst alarm part, motor steering control part, power supply circuit, upper communication circuit and fault diagnosis circuit, the data acquisition part includes the displacement of the tie rod Transmission signal receiving circuit, steering wheel angle signal receiving circuit, vehicle speed signal receiving circuit, tire blowout pressure detection signal receiving circuit, the data processing part includes steering tie rod displacement signal processing circuit, steering wheel angle signal processing circuit, vehicle speed signal processing circuit, tire blowout pressure Detection signal processing circuit, steering tie rod displacement signal receiving circuit is connected with steering tie rod displacement signal processing circuit, steering wheel angle signal receiving circuit is connected with steering wheel angle signal processing circuit, vehicle speed signal receiving circuit is connected with vehicle speed signal processing circuit, tire blowout pressure detection The signal receiving circuit is connected with the tire blowout pressure detection signal processing circuit, the tire blowout display part includes a tire blowout display circuit and the tire blowout display screen connected with the tire blowout display circuit, and the tire blowout alarm part includes a tire blowout alarm driving circuit and a tire blowout alarm The alarm buzzer connected to the drive circuit, the motor steering control part includes the motor steering drive circuit and the steering control motor connected with the motor steering drive circuit, the steering tie rod displacement sensor signal processing circuit, the steering wheel angle signal processing circuit, the vehicle speed signal processing circuit, The tire blowout pressure detection signal processing circuit, the blowout display circuit, the blowout alarm drive circuit, the motor steering drive circuit, the power supply circuit, the host communication circuit and the fault diagnosis circuit are respectively connected with the ECU processor. the

The further technical scheme of the present invention is: described ECU processor is provided with the control program that is used to control above-mentioned automobile run-flat tire controller work, and the control process that this control program controls automobile run-flat tire controller work comprises the following steps: 1) by bursting The tire pressure detection signal sensor detects the tire pressure signal, and judges whether there is a tire blowout by the pressure signal. If there is a tire blowout, then determine which tire or several tires have a blowout, and save the blowout information to provide parameters for subsequent blowout control. ; 2) After the ECU processor detects the tire blowout signal, the tire blowout alarm device is started and the tire blowout display device displays the tire blowout information. When the tire blowout alarm device is started, the ECU processor controls the brake light or the rear taillight to automatically light up; 3 ) detect the vehicle speed through the vehicle speed signal sensor, judge whether the vehicle speed is higher than the safe speed, if it is lower than the safe speed, then exit the control, if it is higher than the safe speed, then calculate the target steering angle through the vehicle handling dynamics model of the flat tire; 4) through the steering wheel angle signal The sensor detects whether the steering wheel is turning or not and the steering direction and angle of the steering wheel. If there is no steering information, the steering system of the car is directly controlled by the motor steering control device to enter the run-flat tire control. If the steering wheel is turning, the steering direction and steering angle of the steering wheel are detected. The size and steering speed information provide correction parameters for correcting the steering deflection angle, and then the motor steering control device controls the steering of the car's steering system; 5) Closed-loop control is performed by collecting information from the steering tie rod displacement signal sensor. the

A further technical solution of the present invention is: in step 4) when the steering wheel has an input steering signal, the steering signal input by the driver is a high priority, and the control output of the steering control system is corrected according to the steering wheel input steering signal to control the car. direction of travel. the

Adopting the automobile run-flat tire controller based on electric steering of the present invention has the following beneficial effects:

1. The car run-flat tire controller based on the electric steering of the present invention adopts the active blow-proof tire technology. When a tire blows out, the tire blowout alarm device is started immediately and the tire blowout display device displays the blown tire information. The ECU of the car run-flat tire controller The processor controls the motor steering control device, and the motor steering control device controls the steering system of the car to keep the car moving in the original driving direction after the tire blows out. Since the car's run-flat tire controller is electrically controlled, the reaction time is short, from the sudden tire burst to the car. The steering system performs the steering for about 0.1 seconds (it is reported that the time from the start of the puncture to the occurrence of the traffic accident is 2-3 seconds). Casualties and property damage. the

2. The electronic components of the electric steering-based automobile run-flat tire controller of the present invention use high-quality industrial-grade chips and control circuits, which can effectively guarantee the service life of the controller, have high reliability, and are not likely to affect normal use due to failure. the

3. The electric steering-based automobile run-flat tire controller of the present invention is small in size, simple in structure, easy to install and use, low in cost, and easy to popularize and apply. the

The electric steering-based automobile run-flat tire controller of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. the

Description of drawings

Fig. 1 is the schematic block diagram of the structure of the automobile run-flat tire controller based on electric steering in the present invention. the

Fig. 2 is the control flowchart of the automobile run-flat tire controller based on electric steering in the present invention. the

Fig. 3-1 to Fig. 3-12 are the control schematic diagrams of the automobile run-flat tire controller based on electric steering in the present invention:

Figure 3-1 is a schematic diagram of the upper computer communication circuit;

Figure 3-2 is a schematic diagram of the analog input circuit such as steering wheel angle;

Figure 3-3 is a schematic diagram of the JTAG debugging interface circuit;

Figure 3-4 is a schematic diagram of the digital signal input circuit;

Figure 3-5 is a schematic diagram of the vehicle speed pulse quantity input circuit;

Figure 3-6 is a schematic diagram of the power circuit;

Figure 3-7 is a schematic diagram of the auxiliary circuit;

Figure 3-8 is a schematic diagram of the processor pin connection;

Figure 3-9 is a schematic diagram of a tire burst display and alarm driving circuit;

Figure 3-10 is a schematic diagram of the steering motor drive circuit of a car with a flat tire;

Figure 3-11 is a schematic diagram of each interface wiring circuit;

Figure 3-12 is a schematic diagram of the analog-to-digital conversion standard reference voltage and indicator light circuit.

Detailed ways

As shown in Fig. 1 to Fig. 3-12, the automobile run-flat tire controller (hereinafter referred to as "automotive run-flat tire controller") based on the electric steering of the present invention, the hardware of the automobile run-flat tire controller includes ECU processor, data acquisition part , data processing part, tire burst display part, tire burst alarm part, motor steering control part, power supply circuit, host communication circuit and fault diagnosis circuit. the

The function of the data acquisition part is to collect the steering tie rod displacement signal, the steering wheel angle signal, the vehicle speed signal, and the tire blowout pressure detection signal. The data acquisition part includes the steering tie rod displacement transmission signal receiving circuit, the steering wheel angle signal receiving circuit, and the vehicle speed signal receiving circuit. , The tire blowout pressure detection signal receiving circuit, the steering tie rod displacement signal receiving circuit is used to collect the signal of the steering tie rod displacement sensor, the steering wheel angle signal receiving circuit is used to collect the signal of the steering wheel angle sensor, and the vehicle speed signal receiving circuit is used to collect the vehicle speed The signal of the sensor, the tire burst pressure detection signal receiving circuit is used to collect the signal of the tire burst pressure sensor. The data processing part includes steering tie rod displacement signal processing circuit, steering wheel angle signal processing circuit, vehicle speed signal processing circuit, tire blowout pressure detection signal processing circuit, steering tie rod displacement signal receiving circuit connected with steering tie rod displacement signal processing circuit, steering wheel angle The signal receiving circuit is connected with the steering wheel angle signal processing circuit, the vehicle speed signal receiving circuit is connected with the vehicle speed signal processing circuit, and the tire blowout pressure detection signal receiving circuit is connected with the tire blowout pressure detection signal processing circuit. the

The tire burst display part includes the tire burst display circuit and the tire burst display screen connected with the tire burst display circuit, the tire burst alarm part includes the tire burst alarm drive circuit and the alarm buzzer connected with the tire burst alarm drive circuit, and the motor steering control part It includes a motor steering drive circuit and a steering control motor connected with the motor steering drive circuit. the

Steering tie rod displacement signal processing circuit, steering wheel angle signal processing circuit, vehicle speed signal processing circuit, tire blowout pressure detection signal processing circuit, tire blowout display circuit, tire blowout alarm drive circuit, motor steering drive circuit, power supply circuit, host communication circuit and The fault diagnosis circuit is respectively connected with the ECU processor. the

The ECU processor of the automobile run-flat tire controller is the ATmega128 single-chip microcomputer. The AD module in the ATmega128 single-chip microcomputer can process the electrical signals input by the steering tie rod displacement signal sensor and the steering wheel angle signal sensor respectively. Since the signal collected by the steering tie rod displacement sensor is Analog signal, the quality and reliability of the collected signal will directly affect the accuracy of the directional control after the tire blows out, so it is necessary to use the A/D module that comes with the ATmega128 microcontroller to collect the analog signal, and then the ATmega128 microcontroller can carry out follow-up The signal collected by the steering wheel angle signal sensor includes steering angle, steering direction and steering speed information. The signal of the steering wheel angle signal sensor is a digital input signal. The digital signal also needs to be filtered to improve the accuracy of the measurement results. The analog input circuit of the A/D module of the ATmega128 microcontroller includes a 10-bit precision A/D converter and an 8-channel analog selection switch, the mode conversion time of the A/D module, the maximum sampling frequency is 15kHz, and The working voltage range can meet the signal acquisition requirements of the steering tie rod displacement signal sensor and the steering wheel angle signal sensor. the

The voltage chip of the power circuit is LM2575T-5.0V power chip, and the battery power used in general cars is 24V DC power. The four sensors of the pressure detection sensor need a 5V DC power supply. The LM2575T-5.0V power supply chip can just convert the 24V voltage into a 5V voltage, and the power meets the requirements to ensure that the power supply voltage is stable and will not cause damage to the sensor and the car run-flat tire controller. The output signal has a large deviation, and the control accuracy is guaranteed. the

The steering control motor selected by the present invention belongs to low-power DC motor, but the ATmega128 single-chip microcomputer still cannot directly drive this DC motor, and the driving of the steering control motor adopts a full-bridge chopper circuit, and the working process of the full-bridge chopper circuit is: 4 Field effect transistors D1 and D4 form a group, D2 and D3 form a pair and are controlled by pulse width modulation, and D1, D4 or D2 and D3 are turned on or off at the same time, which is a complementary working state, that is, D1 and D4 are turned on When D2 and D3 are turned off, D1 and D4 are turned off when D2 and D3 are turned on. D1, D4 and D2 and D3 are turned on and off alternately. When D1 and D4 are turned on and D2 and D3 are turned off, the current passes from left to right Steering control motor, then the steering control motor will rotate forward, when D3 and D2 are turned on and D1 and D4 are turned off, the current will pass through the steering control motor from right to left, then the steering control motor will reverse, so a full bridge chopper circuit is used It can make the steering control motor realize forward rotation and reverse rotation. the

ATmega128 microcontroller has two USART serial interfaces. The present invention adopts USART1 serial port and uses it for serial communication, and this serial port includes the RXD1 port of inputting and receiving data and the TXD1 port of outputting and sending data, because the voltage of USART1 serial port of ATmega128 single-chip microcomputer is TTL logic level, communication distance is limited, far For distance communication, the signal attenuation is serious, so the RS232 logic level is selected to improve the long-distance communication capability. There is a special level conversion chip for the level conversion between TTL logic level and RS232 logic level. Here, the MAX232 chip of MAXIM company is selected to The TTL level of the USART1 serial port of the ATmega128 single-chip microcomputer is converted into the RS232 logic level suitable for long-distance communication. Connect the RXD1 port and connect the receiving data end of the upper computer with the TXD1 port of the ATmega128 microcontroller for sending data. the

In order to prevent the failure of the automobile run-flat tire controller, the present invention adds a fault diagnosis circuit. The fault diagnosis circuit is mainly capable of displaying and storing fault data after a fault occurs, and can send fault data through the interface during fault inspection for reference by testing personnel. Save time on troubleshooting. the

The ECU processor of described automobile run-flat controller is provided with the control program for controlling the work of above-mentioned automobile run-flat controller, and this control program includes following modules: the program design of described automobile run-flat controller mainly includes five modules: A signal acquisition module, a module for interrupt setting the timer, a serial communication module, an angle deviation calculation module, and a steering motor control module. the

The signal acquisition module is used to process the signals collected by the steering tie rod displacement signal sensor and the tire blowout pressure detection signal sensor. Analog-to-digital conversion and filtering processing. the

The module for interrupt setting of the timer is used to determine the frequency of collecting various sensor signals by the automobile run-flat tire controller. The signal of the blown tire pressure sensor adopts the external interrupt mode. When the blown tire occurs, the timer interrupt setting module program initializes Atmega128 The microcontroller uses the timer T1 interrupt to determine the frequency at which the automobile tire controller collects the signals of the steering tie rod displacement sensor and the steering wheel angle sensor, and sets the timer T1 to generate an interrupt every 10ms. The acquisition of the vehicle speed signal is also started at the same time. the

The serial port communication module is used to complete the serial port initialization, serial port sending and serial port receiving functions. The car run-flat tire controller and the upper computer use the interrupt method to receive data and use the query method to send data. the

The angle deviation calculation module converts the input signal of the steering tie rod displacement sensor into the steering angle to calculate the target steering angle and finally calculates the control voltage required by the steering motor. During the control process of the automobile run-flat tire controller, the angle deviation calculation module Control the Atmega128 microcontroller to calculate the deviation between the input steering target angle and the feedback steering tie rod position according to the input signal of the steering tie rod displacement signal sensor and the voltage angle conversion relationship between them. the

The steering motor control module is used to automatically control the steering control motor and then control the steering system of the car to maintain high stability of the car when a tire blowout occurs. The ATmega128 MCU has 2 PWM channels. To control the 4 FETs of the full-bridge chopper circuit, the bipolar full-bridge chopper control is adopted, and the steering control of the DC motor is realized by adjusting the PWM duty cycle of the DC motor. Reverse and speed size control. the

Described control program controls automobile run-flat tire controller work to comprise the following steps: 1) detects tire pressure signal by tire pressure detection signal sensor, judges by pressure signal whether blow-out occurs, if blow-out occurs and then determines which one or Which tires have a blowout, save the blowout information to provide parameters for subsequent blowout control; 2) After the ECU processor detects the blowout signal, it will activate the blowout alarm device and the blowout display device will display the blowout information, and the ECU will process it The device controls the tire blowout alarm drive circuit to drive the alarm buzzer to send out an alarm sound. At the same time, the ECU processor controls the tire blowout display circuit to drive the tire blowout display screen to display the tire blowout information, prompting the driver that a certain tire has a blowout, and starts the blowout alarm. When the device is installed, the car's run-flat tire controller controls the brake light or rear tail light to automatically light up, warning the driver of the vehicle behind to take emergency safety measures to prevent rear-end collision accidents; 3) detect the speed of the car through the speed signal sensor, and judge whether the speed is higher than the safe speed , if it is less than the safe vehicle speed, the control will be exited, and if it is greater than the safe vehicle speed, the target steering angle will be calculated by the vehicle handling dynamics model of the blown tire, where the vehicle handling dynamics model of the blown tire is:

                （1-1）

(1-1)

               （1-2）

(1-2)

两个目标控制量，   

为因爆胎引起的转向角，   

为汽车前进速度，其余为汽车的自身结构参数包括质量车轮半径R，爆胎后车轮滚动半径r、车辆质量m、前轴到质心的距离a、后轴到质心的距离b、车轮之间的距离B、整车重心高度h、轮胎侧偏刚度K_C、悬架的刚度为K、横摆转动惯量I，由于爆胎汽车操纵动力学模型是一个已知模型，在此不再详细描述其推理过程；4)通过方向盘转角信号传感器检测方向盘有无转向及方向盘转向方向（这里的转向方向是指左转还是右转）和转向角度大小，如果无转向信息则直接由电机转向控制装置控制汽车的转向系统转向而进入防爆胎控制，如果方向盘有转向，则检测方向盘的转向方向、转向角大小及转向速度信息为修正转向偏角提供修正参数，再由电机转向控制装置控制汽车的转向系统转向，当方向盘有输入转向信号时，以驾驶员输入的转向信号为高优先级，强制汽车的转向系统根据方向盘的输入的转向信号控制汽车的转向系统转向；5)通过采集转向横拉杆位移信号传感器的信息进行闭环控制。 The two formulas of the model include the vehicle lateral velocity V _Y and the yaw rate

Two target control quantities,

is the steering angle caused by a blowout,

is the forward speed of the car, and the rest are the structural parameters of the car itself, including the mass wheel radius R, the wheel rolling radius r after a tire blowout, the vehicle mass m, the distance a from the front axle to the center of mass, the distance b from the rear axle to the center of mass, and the distance between the wheels Distance B, vehicle center of gravity height h, tire cornering stiffness K _C , suspension stiffness K, yaw moment of inertia I, since the vehicle handling dynamics model with a blown tire is a known model, it will not be described in detail here Reasoning process; 4) Use the steering wheel angle signal sensor to detect whether the steering wheel is turning or not, the steering direction of the steering wheel (the steering direction here refers to turning left or right) and the size of the steering angle. If there is no steering information, the motor steering control device will directly control the car The steering system turns to enter the run-flat tire control. If the steering wheel is turned, the steering direction, steering angle and steering speed information of the steering wheel are detected to provide correction parameters for correcting the steering deflection angle, and then the steering system of the car is controlled by the motor steering control device. , when the steering wheel has an input steering signal, the steering signal input by the driver is a high priority, and the steering system of the car is forced to control the steering system of the car according to the steering signal input from the steering wheel; 5) by collecting the steering tie rod displacement signal sensor information for closed-loop control.

After the control is completed, the driver cancels the alarm by pressing the button set in the car or the ATmega128 single-chip microcomputer no longer conducts the clutch of the steering control motor after the car stops, so that the steering control motor cancels the steering control of the run-flat tire and cancels the blow-out alarm device And the work of the flat tire display device. the

The above-mentioned embodiment is only the best implementation mode of the present invention, and the present invention is not limited to the form of the above-mentioned embodiment, as long as the transformation done within the scope of the present invention belongs to the category of the present invention. the

Claims (2)

1. automobile tire burst prevention controller based on electric powered steering, it is characterized in that, the hardware of this automobile tire burst prevention controller comprises the ECU treater, part of data acquisition, data processing section, the display part of blowing out, the warning part of blowing out, the motor steering control part, power circuit, upper communicating circuit and fault diagnosis circuit, part of data acquisition comprises tierod displacement signal acceptor circuit, the steering wheel angle signal receiving circuit, the vehicle speed signal acceptor circuit, the pressure detecting signal acceptor circuit of blowing out, data processing section comprises tierod displacement signal treatment circuit, the steering wheel angle signal processing circuit, the vehicle speed signal treatment circuit, the pressure detecting signal treatment circuit of blowing out, tierod displacement signal acceptor circuit is connected with tierod displacement signal treatment circuit, the steering wheel angle signal receiving circuit is connected with the steering wheel angle signal processing circuit, the vehicle speed signal acceptor circuit is connected with the vehicle speed signal treatment circuit, the pressure detecting signal acceptor circuit of blowing out is connected with the pressure detecting signal treatment circuit of blowing out, the display part of blowing out comprises blow out display circuit and the read-out of blowing out that is connected with the display circuit of blowing out, blowing out reports to the police partly comprises the alarm buzzer of blowing out the warning driving circuit and being connected with the warning driving circuit of blowing out, the motor steering control part comprise the motor steering driving circuit and be connected with the motor steering driving circuit turn to control motor, tierod displacement transducer signal treatment circuit, the steering wheel angle signal processing circuit, the vehicle speed signal treatment circuit, the pressure detecting signal treatment circuit of blowing out, the display circuit of blowing out, the warning driving circuit of blowing out, the motor steering driving circuit, power circuit, upper communicating circuit and fault diagnosis circuit are connected with the ECU treater respectively; Be provided be used to the control program of controlling above-mentioned automobile tire burst prevention controller work in the described ECU treater, the control process of this control program control automobile tire burst prevention controller work may further comprise the steps: 1) detect tire pressure signal by the pressure detecting signal sensor of blowing out, have or not the generation of blowing out by the pressure signal judgement, occur to determine again if blow out which or which take turns Somatic Embryogenesis and blow out, preserve the information of blowing out and provide parameter for follow-up runflat control; 2) the ECU treater just starts tire burst alarming device and shows the information of blowing out by the read out instrument of blowing out after detecting signal of tyre burst, and when starting tire burst alarming device, ECU treater control stoplight stop lamp or rear taillight are lighted automatically; 3) detect automobile driving speed by the vehicle speed signal sensor, judge whether the speed of a motor vehicle is higher than safe speed, if namely withdraw from control less than safe speed, if greater than safe speed then by the automobile operation kinetic model calculating target steering angle of blowing out; 4) detecting bearing circle by the steering wheel angle signal transducer has or not and turns to and wheel steering direction and angle, enter runflat control if without direction information then directly turned to by the steering swivel system of motor steering control setup control automobile, if bearing circle turns to, the steering direction, deflection angle size and the turning velocity information that then detect bearing circle provide corrected parameter for correction turns to the drift angle, and the steering swivel system by motor steering control setup control automobile turns to again; 5) carry out closed loop control by the information that gathers the tierod displacement signal sensor.

2. the automobile tire burst prevention controller based on electric powered steering as claimed in claim 1, it is characterized in that, in step 4) in when bearing circle has the input redirect signal, take the turn sign of chaufeur input as high priority, export to control the travel direction of automobile according to the control of the turn sign correction steering control system of bearing circle input.

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