JP4305054B2 - Automobile steering characteristic setting system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steering characteristic setting system for an automobile.
[0002]
[Prior art]
Conventionally, the analysis of the steering characteristics of an automobile is performed based on the feeling evaluation of a skilled driver.
[0003]
However, according to feeling evaluation, since the evaluation result varies due to the variation for each driver, it is difficult to use the feeling evaluation result as a quantitative index.
[0004]
Therefore, as one of the methods for quantitatively evaluating the steering characteristics, the following Patent Document 1 detects the myoelectric potential of the driver's arm and obtains the negative arm maneuvering power based on the detected myoelectric potential. It is disclosed that the steering characteristics are evaluated based on the negative steering power.
[0005]
According to Patent Document 1, it is assumed that the steering power becomes negative when the direction of the steering speed of the steering wheel and the direction of the steering force of the steering wheel are opposite, and the steering power becomes negative. Since it can be seen that the driver is trying to stop the movement of the steering wheel, the straight running stability of the automobile can be quantitatively evaluated based on the magnitude of the negative power.
[0006]
[Patent Document 1]
JP 2002-214083 A
[0007]
[Problems to be solved by the invention]
By the way, as an evaluation index of the steering characteristic, it is also desired to use the steering reaction force at the start of steering as an index in addition to the straight running stability disclosed in Patent Document 1.
[0008]
This is because the steering reaction force at the start of steering, that is, the weight of the steering operation felt by the driver at the start of steering, affects the driver.
Further, as another evaluation index for steering characteristics, it is desirable to use the steering pullback operation during steering as an index.
[0009]
This is because the steering position is finely adjusted with the arm opposite to the arm that pulls and turns the steering wheel during steering, but if the steering pullback operation is large, the steering feels unstable and affects the driver. It is for exerting.
[0010]
These effects are felt differently depending on the driver's muscle strength.
[0011]
Here, according to the present applicant, based on the muscle state of the driver's arm, the inventors have found that the weight of the steering operation felt by the driver and the stability of the steering operation can be quantitatively grasped.
[0012]
For example, the weight of the steering operation has a correlation with the muscle state of the triceps of the driver, and the stability of the steering operation has been found to correlate with the muscle state of the driver's ulnar carpal extensor It is a thing.
[0013]
And after these steering characteristics evaluation, it is desired to set the steering characteristics to the optimum steering characteristics according to each driver.
[0014]
The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle steering characteristic setting system capable of setting optimum steering characteristics regardless of differences in driver muscle strength. There is.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides the following solution as a solution. That is, in the first configuration of the present invention, there is provided a steering characteristic setting system for setting a steering characteristic of an automobile, wherein the driver's arm in an automobile driving state is set. Ulnar carpal extensor Optimal for receiving a muscle state determination device for determining a muscle state and a signal related to the muscle state determined by the muscle state determination device and calculating an optimum steering characteristic for a driver whose muscle state is determined based on the signal The steering characteristic calculation device and the optimum steering characteristic calculated by the optimum steering characteristic calculation device are transferred to a steering control unit that is provided in the driver's automobile and controls the steering characteristic of the automobile, and is set in the control unit. A steering characteristic changing device for changing the steering characteristic The optimum steering characteristic calculation device is configured such that the hysteresis width of the steering characteristic graph indicating the relationship between the steering angle and the steering force is optimal for the driver based on the signal related to the muscle state determined by the muscle state determination device. Calculate the optimal steering characteristics so that the hysteresis width is the same. It is configured.
[0016]
According to the first configuration of the present invention, the optimum steering characteristic is calculated based on the muscle state of the driver, the calculated optimum steering characteristic is provided to the steering control unit of the driver's automobile, and the steering characteristic is changed. Therefore, it is possible to set an optimum steering characteristic corresponding to the difference in the muscle strength of the driver.
[0017]
In the second configuration of the present invention, the muscle state determination device is configured to be provided in a simulation device that simulates the running state of the virtual vehicle based on the driving operation of the driver.
[0018]
In determining the driver's muscle state, providing a means for detecting the muscle state for each driver's automobile increases the automobile cost and is not practical.
[0019]
Therefore, according to the present applicant, a simulation device capable of detecting a muscle state is installed in an automobile manufacturer or an automobile dealer, and knowledge that can detect the muscle state of each driver by having each driver use the simulation device. I found it.
[0020]
According to the second configuration of the present invention, since the muscle state of the driver can be determined by the muscle state determination means provided in the simulation device, the muscle state of each driver's arm while suppressing an increase in automobile cost. Can be determined.
[0021]
In the third configuration of the present invention, the muscle state determination device is configured to be provided in an automobile for evaluation.
[0022]
In determining the driver's muscle state, providing a means for detecting the muscle state for each driver's automobile increases the automobile cost and is not practical.
[0023]
Therefore, according to the present applicant, the inventor has found a knowledge that the muscle state of each driver can be detected by deploying an evaluation vehicle capable of determining the muscle state at an automobile dealer and having the evaluation vehicle be tested.
[0024]
According to the third configuration of the present invention, the muscle state of the driver can be determined by the muscle state determination means provided in the vehicle for evaluation, so that the arm muscles of each driver can be suppressed while suppressing an increase in vehicle cost. The state can be detected.
[0025]
In the fourth configuration of the present invention, the driver's automobile includes
For each different driver The optimum steering characteristic calculation device calculates the optimum Storage means for storing steering characteristics;
A driver identification means for identifying a driver who actually drives a car among a plurality of drivers;
Obtaining the optimum steering characteristic corresponding to the driver identified by the driver identification means stored in the storage means, and changing the steering characteristic to the optimum steering characteristic. Steering characteristic switching means for switching is provided.
[0026]
For example, when a plurality of drivers drive the same car as a family, the muscle strength of the arm is different for each driver, so it is necessary to store optimum steering characteristics for each driver. .
[0027]
According to the fourth configuration of the present invention, since the steering characteristic is switched according to the driver determined by the driver identifying means, it is possible to set the optimum steering characteristic corresponding to each driver.
[0028]
In the fifth configuration of the present invention, the optimum steering characteristic calculation device provides the calculated optimum steering characteristic to the information center, and the information center provides the optimum steering characteristic provided from the optimum steering characteristic calculation device. Optimal steering characteristic storage means for storing characteristics, and optimal steering characteristic transfer means for providing the steering characteristics stored in the optimal steering characteristic storage means to the control unit of the driver's automobile.
[0029]
Since the storage capacity of the control unit of the automobile is limited, there is a possibility that the steering characteristics cannot be stored sufficiently, for example, when the number of drivers to be stored increases.
[0030]
By the way, in recent years, information centers that can communicate with automobile navigation systems and can provide various kinds of information such as traffic information to automobile navigation systems are becoming widespread. This information center provides information to contracted automobiles. In addition to providing information, it is also possible to register information from contracted cars.
[0031]
According to the fifth configuration of the present invention, since the optimum steering characteristic is stored in the information center, many optimum steering characteristics can be stored without being limited by the storage capacity of the control unit provided in the automobile. .
[0032]
【The invention's effect】
According to the present invention, it is possible to set an optimum steering characteristic corresponding to a difference in muscle strength of a driver.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0034]
FIG. 1 is a diagram showing an overall configuration of a steering characteristic setting system according to the present embodiment.
[0035]
In FIG. 1, 1 is an evaluation. for An automobile, 2 is an information center, and 3 is an automobile owned by a driver.
[0036]
Evaluation for The automobile 1 is, for example, a test ride deployed at an automobile manufacturer, an automobile dealer, or the like, and can determine the muscle state of the arm of the driver when the driver actually drives.
[0037]
Also evaluate for Automatic Car 1 Includes a steering characteristic optimizing unit 10 for calculating an optimum steering characteristic of the driver, and a power steering capable of changing the steering characteristic of the steering 1a based on the optimum steering characteristic calculated by the steering characteristic optimizing unit 10. A device 30 and a display device 40 capable of displaying myoelectric potential data are provided.
[0038]
The steering characteristic optimizing unit 10 includes an electroencephalogram detection means 11 for detecting a brain wave of the driver, a triceps detection means 12 for detecting a myoelectric potential of the triceps of the driver, and a muscle of the ulnar carpal extensor of the driver. The ulnar carpal extensor detecting means 13 for detecting the potential, the steering torque sensor 14 for detecting the steering torque of the steering 1a, the steering angle sensor 15 for detecting the steering angle of the steering 1a, and the position of the steering 1a in the height direction are detected. Steering position sensor 16, seat position sensor 17 for detecting the seat position, vehicle speed sensor 18 for detecting the vehicle speed, lateral G sensor 19 for detecting the lateral G of the automobile, longitudinal G sensor for detecting the longitudinal G of the automobile 20. Each detection signal detected by the yaw rate sensor 21 for detecting the yaw rate is input.
[0039]
Then, the steering characteristic optimizing unit 10 calculates the optimum steering characteristic optimum for the driver based on each input detection signal, and changes the steering characteristic of the power steering device 30 based on the calculated optimum steering characteristic. The calculated optimum steering characteristic can be provided to the information center 2. Specific calculation of the optimum steering characteristic will be described later.
[0040]
Further, the power steering apparatus 30 is configured to be able to change assist characteristics for steering by an electric motor.
[0041]
Further, as will be described later with reference to FIGS. 2 and 3, the display device 40 can display the triceps surae myoelectric potential data and the ulnar carpal extensor myoelectric potential data in a graph. It is said that.
[0042]
Based on this display, the driver's steering state can be quantitatively grasped.
[0043]
The information center 2 is capable of bidirectionally transmitting and receiving signals between the evaluation vehicle 1 and the contracted driver's vehicle 3 by radio or the like. for Optimal steering characteristics are provided from the vehicle 1 to the information center 1, and various information such as traffic information collected in the information center 2 is provided from the information center 2 to the vehicle 3. Various information detected by various sensors provided in the automobile 3 is provided to the center 2.
[0044]
Although not described in detail, the information center 2 includes a server as an arithmetic processing device, a database to be described later for storing various information, and a communication device for communicating with an external device via a communication circuit. Yes.
[0045]
Further, the information center 2 includes an optimum steering characteristic storage unit 2a for storing the optimum steering characteristic provided from the steering characteristic optimization unit 10 for each driver, and an optimum steering characteristic stored in the optimum steering characteristic storage unit 2a. Is provided with optimum steering characteristic providing means 2b for providing to a steering control unit 40 of the automobile 3 described later.
[0046]
The automobile 3 is an automobile owned by a driver whose optimum steering characteristics are calculated in the evaluation automobile 1, and includes a steering control unit 50, a power steering device 60, and a personal authentication device 70.
[0047]
The steering control unit 50 receives the optimum steering characteristic corresponding to the individual authenticated by the individual authentication device 70 from the optimum steering characteristic providing means 2b of the information center 2, and the power steering device 60 based on the provided optimum steering characteristic. The steering characteristic is changed.
[0048]
Here, the relationship between the muscle state of the driver's arm and the steering characteristics will be described.
First, the triceps surae will be described.
[0049]
FIG. 2A is a diagram showing the relationship between the steering angle and the steering force for four patterns with different steering reaction forces, and FIG. 2B is a diagram showing the four patterns with different steering reaction forces within a steering angle of 20 deg. It is the figure which each showed the myoelectric potential change of the triceps surae of the right arm in the state which steered repeatedly left and right.
[0050]
In FIG. 2A, a is a steering characteristic 1 indicating the steering characteristic having the largest steering reaction force, b is a steering characteristic 2 indicating the steering characteristic having the second largest steering reaction force, and c is the third steering reaction force. Steering characteristics 3 and d indicating a large steering characteristic are steering characteristics 4 indicating a steering characteristic having the smallest steering reaction force.
[0051]
As shown by data b, c, d in FIG. 2B, in the steering characteristics 2 to 4, the myoelectric potential of the triceps surae is in the vicinity of 0.012 mV, and the myoelectric potential does not increase. On the other hand, in the steering characteristic 1, the myoelectric potential of the triceps surae is increased to 0.016 mV or more, and the triceps surae are greatly active during steering. This is because the steering characteristic 1 has a large steering reaction force, so that the triceps surae are active during steering.
[0052]
Therefore, when the myoelectric potential of the triceps surae becomes approximately 0.016 mV or more, it can be evaluated that the driver begins to feel the steering operation heavy.
As described above, based on the myoelectric potential of the triceps, the driver's steering operation weight can be quantitatively shown.
[0053]
Next, the muscle state of the ulnar carpal extensor will be described.
[0054]
FIG. 3A is a diagram showing the relationship between the steering angle and the steering force for four patterns with different hysteresis, and FIG. 3B is a diagram showing steering with a steering angle within 20 deg for four patterns with different steering reaction forces. FIG. 6 is a diagram showing changes in myoelectric potential of the ulnar carpal extensor of the left arm in a state where the left and right are repeatedly steered.
[0055]
In FIG. 3A, the width indicated by d is the steering characteristic 5 indicating the steering characteristic having the largest hysteresis, the width indicated by e is the steering characteristic 6 indicating the steering characteristic having the second largest hysteresis, and the width indicated by f is the third. A steering characteristic 7 indicating a steering characteristic having a large hysteresis and a width indicated by g are a steering characteristic 8 indicating a steering characteristic having the smallest hysteresis (hysteresis 0).
[0056]
As shown by d and e in FIG. 3 (b), the myoelectric potential of the ulnar carpal extensor is relatively small in the steering characteristics 5 and 6, whereas in the steering characteristics 7 and 8, the ulcer hand The myoelectric potential of the root extensor is large, which indicates that the steering pullback operation has a large steering characteristic. This is because the hysteresis width is too small and the sensitivity of the steering angle to steering is high. Therefore, it can be evaluated that the steering characteristic 5 or the steering characteristic 6 in which the myoelectric potential of the ulnar carpal extensor is small and the pullback operation is small is an appropriate hysteresis width.
[0057]
As described above, based on the myoelectric potential of the ulnar carpal extensor, the driver's steering pullback operation can be quantitatively shown.
[0058]
Next, evaluation based on the flowchart of FIG. for The optimum steering characteristic calculation process by the steering characteristic optimization unit 10 of the automobile 1 will be specifically described.
[0059]
In step S1 of FIG. 4, the base steering characteristic is set based on information about the driver such as the driver's height, sex, and preference for the steering characteristic. This is because, since the steering force characteristics shown in FIG. 2 (a) differ depending on the driver's muscle strength, etc., it is determined in advance whether the base steering characteristics and the triceps have started to be largely active according to the difference. Set the judgment value.
[0060]
In step S2, a characteristic correction value is set based on the seating posture of the driver with respect to the seat based on the seat position and the steering position. This is because the muscle fatigue increases as the seat position is farther from the steering, and the muscle fatigue increases as the steering position increases. Therefore, in order to correct these, the base steering characteristics and determination values set in step S1 are corrected. Set the correction value.
[0061]
In step S3, a steering characteristic is temporarily set based on the base steering characteristic set in step S1 and the characteristic correction value set in step S2.
[0062]
Next, in step S4, it is determined whether the vehicle speed is equal to or higher than a predetermined vehicle speed (for example, 80 km / h).
[0063]
When YES is determined in the step S4, the process proceeds to a step S5 to determine whether or not the steering angle is within a predetermined angle (for example, 20 deg).
When YES is determined in the step S5, the process proceeds to a step S6 so as to determine whether or not the steering speed is equal to or less than a predetermined speed.
[0064]
When YES is determined in step S6, that is, when the vehicle speed is high and the steering angle is steered at a relatively low steering speed, the steering situation is such that the lane is changed on the highway, and the steering feeling and the upper arm Since the correlation with the triceps and the correlation between the pullback of the steering wheel and the extensor carpal extensor is high, the process proceeds to step S7, and the myoelectric potential data of the triceps is collected and the data is being collected. Notify the driver.
[0065]
When any one of the determinations in steps S4 to S6 is determined as NO, the process returns without collecting myoelectric data of the triceps.
[0066]
In subsequent step S8, it is determined whether or not the driver is concentrating on driving. If it is determined YES, the process proceeds to step S9. Note that the determination in step S8 can be made based on, for example, the driver's brain waves.
[0067]
In step S9, the myoelectric potential data of the triceps muscle collected in step S7 is stored in the memory 10a of the steering characteristic optimizing unit 10.
[0068]
When NO is determined in step S8, that is, when the driver is not concentrating on driving, the determination accuracy of the triceps of the driver is lowered, so the process proceeds to step S10 and concentrated on the driver. A power drop alarm is issued, and the process returns without storing the myoelectric potential data of the triceps muscle collected in step S7.
[0069]
Subsequently, in step S11, it is determined whether or not the collected data has collected a predetermined amount, that is, the amount of data that can display the characteristics shown in FIG. 2, and when it is determined YES, the process proceeds to step S12.
[0070]
In step S12, it is determined whether or not the steering characteristic determination is completed, that is, the myoelectric potential data of the triceps collected in step S7 is equal to or higher than the determination value, and the triceps muscle starts a large activity during steering. It is determined whether or not.
[0071]
When it is determined NO in step S12, the process proceeds to step S13, the steering characteristic (steering reaction force value) is changed by a predetermined value, and the process returns. The steering characteristic (steering reaction force value) is changed by a predetermined value until the myoelectric potential data of the triceps surae becomes equal to or higher than the determination value.
[0072]
If YES is determined in the step S13, the process proceeds to a step S14 so as to display the triceps surae potential data collected for each steering reaction force on the display device 40 so as to be compared. The display is as shown in FIG.
[0073]
Subsequently, in step S15, a steering reaction force value smaller than the steering reaction force value at which the myoelectric potential data of the triceps surae becomes equal to or higher than the determination value is set as the optimum steering reaction force.
[0074]
Next, in step S16, EMG data of the ulnar carpal extensor is collected and the driver is notified that the data is being collected.
[0075]
In step S17, as in step S8, it is determined whether or not the driver is concentrated on driving. If YES is determined, the process proceeds to step S18.
[0076]
In step S18, the myoelectric potential data of the ulnar carpal extensor collected in step S17 is stored in the memory 10a of the steering characteristic optimizing unit 10.
[0077]
When NO is determined in step S17, that is, when the driver is not concentrating on driving, the determination accuracy of the ulnar carpal extensor of the driver is lowered. Then, a concentration reduction alarm is issued, and the process returns without storing the myoelectric potential data of the ulnar carpal extensor muscles collected in step S16.
[0078]
Subsequently, in step S19, it is determined whether or not the collected data has collected a predetermined amount, that is, the amount of data capable of displaying the characteristics shown in FIG. 3, and when it is determined YES, the process proceeds to step S20.
[0079]
In step S20, it is determined whether or not the steering characteristic determination is completed, that is, step S1. 6 The collected myoelectric potential data of the ulnar carpal extensor is equal to or greater than the determination value, and it is determined whether the pull back operation is large due to the activity of the ulnar carpal extensor during steering.
[0080]
When it is determined NO in step S20, the process proceeds to step S21, the steering hysteresis width is changed by a predetermined value, and the process returns. Then, the steering hysteresis width is changed by a predetermined value until the myoelectric potential data of the ulnar carpal extensor is equal to or higher than the determination value.
[0081]
When YES is determined in the step S20, the process proceeds to a step S22 so that the myoelectric potential data of the ulnar carpal extensor collected for each steering hysteresis width is displayed on the display device 40 so as to be comparable. The display is as shown in FIG.
[0082]
In step S23, the steering hysteresis width is greater than the determination value of the myoelectric potential data of the ulnar carpal extensor muscle. large The steering hysteresis width is set as the optimum steering hysteresis width.
[0083]
In step S24, the followability is grasped based on the relationship between the vehicle behavior such as the lateral G and the yaw rate with respect to the steering of the steering 1a, and for the driver whose steering speed is always slow and the vehicle behavior greatly appears with respect to the steering. Thus, a correction value is set for correcting the steering reaction force value so as to reduce the steering characteristic.
[0084]
In step S25, the optimum steering characteristic is finally set based on the steering reaction force value set in step S15, the steering hysteresis width set in step S23, and the correction value set in step S24.
[0085]
In step S26, the optimum steering characteristic optimum for each driver is stored in the memory 10a of the steering characteristic optimization unit 10 in correspondence with the ID of each driver, and in step S27, the optimum steering characteristic is provided to the information center. .
[0086]
Next, the optimum steering characteristic changing process by the steering characteristic unit 50 of the automobile 3 will be specifically described based on the flowchart of FIG.
[0087]
In step S30, it is determined whether or not the ignition switch is turned on.
[0088]
When YES is determined in the step S30, the process proceeds to a step S31 so as to determine whether or not the ignition switch has been previously turned off.
[0089]
When it is determined YES in step S31, that is, when the ignition switch is turned on for the first time this time, the process proceeds to step S32.
[0090]
In step S <b> 32, the optimum steering characteristic stored corresponding to the driver recognized by the personal authentication device 70 is obtained from the information center 2.
[0091]
In step S33, the steering characteristic of the power steering apparatus 60 is set based on the optimum steering characteristic obtained in step S32. In the subsequent step S34, the power steering apparatus 60 is controlled based on the optimum steering characteristic set in step S33. To do.
[0092]
If NO is determined in step S31, the process proceeds to step S34 without performing the processes of steps S32 and S33.
[0093]
If NO is determined in step S30, the process returns without performing any process.
[0094]
As described above, according to the present embodiment, the optimal steering characteristic is calculated based on the muscle state of the driver, and the calculated optimal steering characteristic is transferred to the steering control unit 50 of the driver's automobile 3, Since the steering characteristic is changed, it is possible to set the optimum steering characteristic corresponding to the difference in the muscle strength of the driver.
[0095]
In particular, since the steering reaction force is set based on the myoelectric potential of the triceps surae muscle, it is possible to set the optimum steering weight according to the driver.
[0096]
Further, since the steering hysteresis width is set based on the myoelectric potential of the ulnar carpal extensor muscle, the pull back operation amount can be set appropriately.
[0097]
In addition, since the steering reaction force is calculated based on the muscle state of the triceps determined when the driver is concentrating on driving, the steering reaction force characteristics accompanying a decrease in the accuracy of determining the muscle state of the triceps The shift in value can be suppressed.
[0098]
In addition, since the steering hysteresis width is calculated based on the muscle state of the ulnar carpal extensor determined when the driver is concentrating on driving, the accuracy of determining the muscle state of the ulnar carpal extensor is reduced. A shift in the steering hysteresis width can be suppressed.
[0099]
Also, the car for evaluation 1 The driver's muscle state can be determined by the triceps surae detecting means 12 and the ulnar carpal extensor detecting means 13 for detecting the myoelectric potential of the ulnar carpal extensor provided in the vehicle, so that the vehicle cost increases. The muscle state of each driver's arm can be detected while suppressing the above.
[0100]
Further, since the steering characteristics are switched according to the driver determined by the personal authentication device 70, it is possible to set the optimum steering characteristics corresponding to each driver.
[0101]
Further, since the optimum steering characteristic is stored in the optimum steering characteristic storage means 2a of the information center 2, many optimum steering characteristics can be stored without being limited by the storage capacity of the steering control unit 50 provided in the automobile 3. Can do.
[0102]
In the present embodiment, the example in which the optimum steering characteristic is stored in the optimum steering characteristic storage unit 2a of the information center 2 has been described. However, the optimum steering characteristic may be stored in the steering control unit 50 of the automobile 3.
[0103]
In that case, the steering control unit 50 in the driver's automobile 3 has an optimum steering characteristic that switches the optimum steering characteristic according to the driver determined by the optimum steering characteristic storage means 50a and the personal authentication device 70, as shown in FIG. Switching means 50b.
[0104]
Further, in this embodiment, the driver's muscle state is evaluated by an automobile for evaluation. 1 The triceps surae detecting means 12 and the ulnar carpal extensor detecting means 13 for detecting the myoelectric potential of the ulnar carpal extensor are provided. The triceps surae detecting means 12 and the ulnar carpal extensor detecting means 13 provided in the simulation device that is provided in the simulation device that can simulate the driving of the virtual vehicle by the driving of the driver may be used.
[0105]
In this embodiment, evaluation is also performed. for Although an example in which optimum steering characteristics are provided between the car 1 and the driver's car 3 via the information center 1 has been shown, direct evaluation without going through the information center 1 for The optimum steering characteristics may be provided from the automobile 1 to the driver's automobile 3.
[0106]
In the present embodiment, an example in which the myoelectric potential of the triceps is directly detected as the determination of the triceps muscle state is described. However, the triceps muscle is also obtained from the myoelectric potential of the biceps. The myoelectric potential may be estimated.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a steering characteristic setting system according to an embodiment.
FIG. 2 is a graph showing myoelectric potential characteristics of the triceps surae muscle.
FIG. 3 is a graph showing myoelectric potential characteristics of the ulnar carpal extensor muscle.
FIG. 4 is an evaluation regarding the embodiment. for The flowchart which shows the optimal steering characteristic calculation process by the steering characteristic optimization control unit of a motor vehicle.
FIG. 5 is a flowchart showing a steering control process performed by the steering control unit of the driver's automobile according to the embodiment.
FIG. 6 is a diagram showing a configuration of a driver's automobile according to another embodiment.
[Explanation of symbols]
1: Evaluation for Car
2: Information center
2a: Optimal steering characteristic storage means
2b: Means for providing optimum steering characteristics
10: Steering optimization control unit (optimum steering characteristic calculation device, steering characteristic change device)
11: EEG detection means (concentration determination means)
12: Triceps muscle detection means (muscle state determination means)
13: Measure-side carpal extensor muscle detection means (muscle state determination means)
30, 60: Power steering device
40: Display device
50: Steering control unit
50a: Optimal steering characteristic storage means
50b: Optimal steering characteristic switching means
70: Personal authentication device (driver identification means)

Claims (5)

A steering characteristic setting system for setting a steering characteristic of an automobile,
A muscle state determination device for determining the muscle state of the ulnar carpal extensor muscles of the driver's arm in the driving state of the automobile;
An optimum steering characteristic calculation device that receives a signal related to the muscle condition determined by the muscle condition determination device and calculates an optimum steering characteristic for the driver based on the signal;
The optimum steering characteristic calculated by the optimum steering characteristic calculation device is provided to the steering control unit that is provided in the driver's automobile and controls the steering characteristic of the automobile, thereby changing the steering characteristic set in the steering control unit. and a steering characteristic changing apparatus,
The optimum steering characteristic calculating device has a hysteresis width of a steering characteristic graph showing a relationship between a steering angle and a steering force based on a signal related to a muscle state determined by the muscle state determining device, and has an optimum hysteresis for the driver. A steering characteristic setting system for an automobile, wherein the optimum steering characteristic is calculated so as to have a width .   2. The vehicle steering characteristic setting system according to claim 1, wherein the muscle state determination device is provided in a simulation device that simulates a running state of a virtual vehicle based on a driving operation of a driver.   2. The vehicle steering characteristic setting system according to claim 1, wherein the muscle state determination device is provided in an evaluation vehicle. In the car of the above driver,
Storage means for storing the optimum steering characteristic calculated by the optimum steering characteristic calculation device for each of a plurality of different drivers;
A driver identification means for identifying a driver who actually drives a car among a plurality of drivers;
Steering characteristic switching means for obtaining an optimum steering characteristic corresponding to the driver identified by the driver identification means stored in the storage means and switching the steering characteristic to the optimum steering characteristic ; The vehicle steering characteristic setting system according to any one of claims 1 to 3. The optimum steering characteristic calculation device provides the calculated optimum steering characteristic to the information center,
The information center includes optimum steering characteristic storage means for storing the optimum steering characteristic provided from the optimum steering characteristic calculation device, and
The vehicle according to any one of claims 1 to 3 , further comprising optimum steering characteristic providing means for providing the steering characteristic stored in the optimum steering characteristic storage means to a control unit of the automobile of the driver. Steering characteristic setting system.

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