WO2004110854A1 - 同軸二輪車 - Google Patents
同軸二輪車 Download PDFInfo
- Publication number
- WO2004110854A1 WO2004110854A1 PCT/JP2004/008069 JP2004008069W WO2004110854A1 WO 2004110854 A1 WO2004110854 A1 WO 2004110854A1 JP 2004008069 W JP2004008069 W JP 2004008069W WO 2004110854 A1 WO2004110854 A1 WO 2004110854A1
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- WIPO (PCT)
- Prior art keywords
- base
- coaxial
- pair
- load
- wheeled vehicle
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C17/00—Roller skates; Skate-boards
- A63C17/12—Roller skates; Skate-boards with driving mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
- B62K11/007—Automatic balancing machines with single main ground engaging wheel or coaxial wheels supporting a rider
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot
- G05D1/08—Control of attitude, i.e. control of roll, pitch, or yaw
- G05D1/0891—Control of attitude, i.e. control of roll, pitch, or yaw specially adapted for land vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/16—Single-axle vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/24—Personal mobility vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/46—Wheel motors, i.e. motor connected to only one wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/14—Acceleration
- B60L2240/18—Acceleration lateral
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/14—Acceleration
- B60L2240/20—Acceleration angular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/22—Yaw angle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/20—Drive modes; Transition between modes
- B60L2260/34—Stabilising upright position of vehicles, e.g. of single axle vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Definitions
- the present invention relates to a coaxial two-wheeled vehicle provided with wheels at both ends of the same shaft.
- the Disclosure of the Invention has been proposed in view of such conventional circumstances, and it is stable against load weight change, and stable compatibility between attitude control and travel control is possible. It aims at providing a possible coaxial two-wheeled vehicle.
- Another object of the present invention is to provide a coaxial two-wheeled vehicle which can travel safely and stably even if the center of gravity of the passenger moves.
- a coaxial two-wheeled vehicle comprises: a pair of wheels; a wheel shaft constructed between the pair of wheels; and a wheel pivotally supported on the wheel shaft.
- a coaxial two-wheeled vehicle comprising: a pair of drive motors mounted on the base for driving each of the pair of wheels; and a control device for sending operation commands to the pair of drive motors.
- Load detection means for detecting the position and weight of the load on the base, and angle detection means for detecting the angle of the base about the wheel axis are provided, and the control device is for canceling the torque due to the load.
- a first control mechanism that generates a first torque and generates a second torque for maintaining the base at a predetermined angle corresponding to the angle of the base about the wheel axis; Position of And a second control mechanism independent of the first control mechanism to generate a third torque for causing the vehicle to travel, and the operations corresponding to the first to third torques It instructs each of the drive motors.
- Such a coaxial two-wheeled vehicle has, for example, a first torque for offsetting the torque due to the load on the base detected by the load detecting means comprising a plurality of pressure sensors, and an angle consisting of, for example, a mouth opening sensor and an acceleration sensor.
- the first to third torque equivalent operations are instructed to each of the pair of drive motors to drive the pair of wheels.
- a coaxial two-wheeled vehicle comprises: a pair of wheels; a wheel shaft installed between the pair of wheels; and a base supported so as to be tiltable on the wheel shaft. And a control device mounted on the base and having a pair of drive motors for driving each of the pair of wheels, and a control device for sending an operation command to the pair of drive motors.
- the load control means is provided with load detection means for detecting the position and weight of the load on the base, and the control device does not send a traveling command when the position of the load is within a predetermined stop area, When the position of the load is outside the stop area, a travel command corresponding to the position is sent to each of the pair of drive motors.
- the position of the load on the base is within a predetermined stop area, for example, the range in the direction perpendicular to the wheel axis is in the range perpendicular to the wheel axis of the contact area where the pair of wheels contact the road surface. If it is in such an area, it does not send a run command, and if it is out of the stop area, it sends a run command according to its position.
- a coaxial two-wheeled vehicle comprises: a pair of wheels; a wheel shaft installed between the pair of wheels; and a base supported so as to be tiltable on the wheel shaft. And a control device mounted on the base and having a pair of drive motors for driving each of the pair of wheels, and a control device for sending an operation command to the pair of drive motors.
- the load control means is provided with a load detection means for detecting the position and weight of the load on the base, and the control device performs a running command to decelerate and stop when the position of the load is within a predetermined deceleration area.
- the driving command is sent to each of the pair of driving motors, and when the position of the load is out of the deceleration area, a traveling command according to the position is sent to each of the pair of driving motors.
- a traveling command for decelerating and stopping is sent. If it is outside the deceleration area, send a travel command according to the position.
- FIG. 1 is an external perspective view showing a coaxial two-wheeled vehicle in the present embodiment.
- FIG. 2 is a side sectional view for explaining the base of the coaxial two-wheeled vehicle.
- FIG. 3A and 3B show a pressure sensor provided on the base of the coaxial two-wheeled vehicle, FIG. 3A shows a plan view, and FIG. 3B shows a side view.
- FIG. 4 is a view showing the positional relationship between the center of weight of the coaxial two-wheeled vehicle and the wheel shaft.
- FIG. 5 is a diagram for explaining the balance between the load torque and the motor torque.
- FIG. 6 is a view for explaining attitude control when a human is on board.
- FIG. 7 is a diagram for explaining a dynamic model for maintaining the posture on the base.
- FIG. 8 is a diagram for explaining a dynamic model for maintaining the posture on the base.
- FIG. 9 is a diagram for explaining a dynamic model for maintaining the posture on the base.
- FIG. 10 is a diagram for explaining a dynamic model in a coaxial two-wheeled vehicle.
- FIG. 11 is a diagram showing a control mechanism for attitude stabilization control.
- FIG. 12 is a view showing a control mechanism for attitude stabilization control and travel control when there is one wheel.
- FIG. 13 is a view for explaining the attitude command in the coaxial two-wheeled vehicle.
- FIG. 14 is a block diagram showing a control mechanism for attitude stabilization control and travel control when there is one wheel.
- FIG. 15 is a diagram showing the block diagram shown in FIG. 14 as a mathematical model.
- FIG. 16 shows a detailed example of the mathematical model shown in FIG.
- Figure 17 shows: Attitude stabilization control and travel control with two wheels It is a block diagram which shows a control mechanism.
- FIG. 18 is a view for explaining the traveling speed control in the forward / backward direction.
- FIG. 19 is a diagram for explaining traveling speed control when turning.
- FIG. 20 is a diagram for explaining a control method in the case where a gyro sensor signal around the y-axis is detected when going straight.
- Fig. 21 A and Fig. 21 B are diagrams for explaining a speed control method when an acceleration signal in the Z-axis direction is detected, and Fig. 21 A is a diagram showing a state in which the vehicle climbs over a step. Fig. 21 B is a diagram showing changes in traveling speed and Z-axis acceleration.
- Fig. 2 2A and Fig. 2 2B are diagrams for explaining the image recognition processing in a coaxial two-wheeled vehicle
- Fig. 2 2A is a diagram showing a CCD camera provided on the base
- Fig. 2 2B is this CCD It is a figure which shows the mode of the obstacle detection by a camera.
- Fig. 2 3 A and Fig. 2 3 B are diagrams for explaining speech recognition processing in a coaxial two-wheeled vehicle
- Fig. 2 3 A is a diagram showing a microphone provided on the base
- Fig. 2 3 B is a diagram by this microphone. It is a figure which shows the mode of sound source detection.
- FIG. 24 is a block diagram showing a control mechanism for realizing sound source detection and the like while traveling.
- FIG. 25 is a view for explaining the software configuration of the coaxial two-wheeled vehicle.
- FIG. 26 is a view for explaining the overall configuration of each circuit in the coaxial two-wheeled vehicle 1.
- FIGS. 27A and 27B are diagrams for explaining the detailed internal configuration of the entire configuration shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. BEST MODE FOR CARRYING OUT THE INVENTION is a diagram for explaining the detailed internal configuration of the entire configuration shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 shows an external perspective view of a coaxial two-wheeled vehicle in the present embodiment.
- a pair of wheels 3 (right wheel 3 R and left wheel 3 L) are fixedly attached to both ends of the wheel shaft 2.
- the wheel 3 is formed of a rubber material having a flexible property, and the inside thereof is filled with air, nitrogen gas or the like. Adjust this gas pressure By adjusting the flexibility of the wheel 3, it is possible to absorb the vibration of the vehicle body and to reduce the vibration due to the unevenness of the road surface and the impact due to the step.
- a groove having a concavo-convex shape is formed on the surface of the wheel 3 and can maintain a high frictional force when traveling on a rough road surface or over a step.
- a base 4 in which a substantially rectangular parallelepiped housing is joined to a wheel shaft 2 is, for example, a control device described later and the like stored under a plate-like body for a person to stand in a standing posture. It is supported so as to be tiltable in two turns.
- a handle 5 for gripping with both hands when mounted on a human is provided.
- the middle point of the wheel axis 2 connecting both wheels is the origin O of the XY coordinate system, and the origin O passes through and parallel to the main surface of the base 4 and the wheel axis 2
- the vertical direction is defined as the X axis or roll axis, the wheel axis direction passing through the origin 0 as the Y axis or pitch axis, and the direction perpendicular to the main surface of the base 4 through the origin 0 as the Z axis or 1 axis.
- the front of the coaxial motorcycle 1 is defined as the positive direction of the X axis, the left side as the positive direction of the Y axis, and the upper side as the positive direction of the Z axis.
- the base 4 is mounted with motors 10 (10 and 10 L) capable of forward and reverse rotation, as shown in FIG. 2, and adjacent to the motor 10, the rotational position of the motor 10 is A universal encoder 1 1 (1 1 R and 1 1 L) is provided for detection. Also, a speed reducer 1 2 (1 2 R and 1 2 L) with gears or timing belts is interposed between the motor 10 and the wheel 3, and the rotation of the motor 10 is this speed reduction. It is transmitted to the wheel 3 via the vessel 1 2 and a joint (not shown).
- This reduction gear 12 has a backlash amount of 1 minute or less, and when rotational torque is applied from the output shaft on the wheel 3 side by an external force, rotational torque is transmitted to the input shaft on the motor 10 side to rotate easily.
- back driver belayability For example, when landing from the air state, the reaction force of the road surface is absorbed by the motor 10 and is attenuated and stabilized by using the speed reducer 12 having such a back-driving ability. be able to. Also, even when the power is shut off, an external force can be applied to the machine to rotate the motor 10 for easy movement. Furthermore, when traveling down a slope according to gravity, a rotational torque is transmitted to the motor 10 to generate a back electromotive force.
- This back electromotive force is used to charge a battery (not shown). Yes, battery operating time can be extended. When the battery is fully charged, control is performed to release the regenerative power as heat by the regenerative resistance. In addition, a power supply management circuit (described later) is installed to charge not only the downhill but also the regenerative power generated during deceleration.
- the base 4 in addition to the gyro sensor 13 for detecting the angular velocity ⁇ ,, ⁇ & w about the pitch axis of the base 4 and the yaw axis, linear acceleration A x, A y in the X, ⁇ and Z directions. , ⁇ , pitch axis, roll axis, acceleration sensor 14 for detecting angular acceleration ⁇ ⁇ , ar, ayaw about one axis, pressure sensor for detecting load weight on the base 4 15 etc.
- the various sensors of are incorporated.
- the pressure sensor 15 is located at four corners between the support 4a and the movable stand 4b constituting the plate-like body of the base 4. is provided, it is possible to detect the four pressure sensors 1 5 ⁇ 1 5 4 from the sensor signal of the load on the base 4 barycentric coordinates (X s, Y g) and its load weight W s. That is, the pressure sensor 1 5, sensor signals ⁇ 1 5 4 are PSPSPSPS 4 respectively, the pressure sensor 1 5 with no load, its own weight in accordance with ⁇ 1 5 4 W. If the load weight W e is given by the following equation (1).
- the X-coordinates of pressure sensor 1 5 15 4 and pressure sensor 1 5 2 , 1 5 3 are respectively X ps, 1 X ps, pressure sensor 1 5 1 5 2 and pressure sensor 1 5 3 , 1 5 4 If the Y coordinate of Y is Y ps, —Y ps, then the barycentric coordinates (X g , Y g ) are obtained as in the following equation (2).
- W 14 represents the weight applied to the pressure sensor 1 5 15 4 in the no load state
- W 23 represents the weight applied to the pressure sensor 1 5 1 5 3 in the no load state
- W Reference numeral 12 indicates the weight applied to the pressure sensor 1 5, 1 5 2 in the no load state
- W 34 indicates the weight applied to the pressure sensor 1 5 3 1, 14 4 in the no load state.
- X g X PS * (W 1-W 2) / (W 1 + W 2)...
- Y g Y PS * (W 3-W 4) / (W 3 + W 4)
- the reaction torque is applied to the motor 10 to maintain balance on the base 4 and stabilize its posture. Is possible.
- the lower housing of the base 4 is mounted with a control unit 16 consisting of a microcomputer, to which various sensor signals and detection signals are inputted. Based on these input signals, the control device 16 generates a motive torque that advances / retracts / turns the machine while keeping the pitch axis angle of the base 4 and the axis angle at appropriate values as described later. Control to do so.
- a control unit 16 consisting of a microcomputer, to which various sensor signals and detection signals are inputted. Based on these input signals, the control device 16 generates a motive torque that advances / retracts / turns the machine while keeping the pitch axis angle of the base 4 and the axis angle at appropriate values as described later. Control to do so.
- this coaxial two-wheeled vehicle 1 is configured such that the center of weight of the base 4 (and the steering wheel 5) which can be tilted about the wheel shaft 2 is positioned below the wheel shaft 2. ing. As a result, the center of gravity of the aircraft is maintained at the most stable position even at the time of stopping, making it difficult to fall.
- the height of the upper surface of the base 4 is higher than the wheel axle 2 in FIG. 4, the upper surface of the base 4 may be lower than the wheel axle 2.
- the load on the base 4 for example the load torque due to human weight
- the motor torque Tm is controlled so as to generate the same moment
- the base 4 balances around the fulcrum like a screw.
- the point corresponding to the fulcrum to keep this balance that is, the point at which the rotational moment about the wheel axis 2 becomes zero is called ZMP (Zero Moment Point).
- ZMP Zero Moment Point
- the motor torque Tm for maintaining attitude is T, where the reduction ratio of the speed reducer 12 is N: 1. It is represented by ZN.
- the center of weight M of the base 4 and the steering wheel 5 is configured to be located below the wheel shaft 2, so
- the difference between the moment due to the human weight Wh and the moment due to the weight Wm of the base 4 and the handle 5 is the wheel axis torque T.
- the balance can be maintained with a relatively small motor torque.
- the dynamic model for maintaining the posture on the base 4 will be described in more detail using the XZ coordinate system shown in FIG.
- the wheel 3 is described as being one for simplicity.
- base 4 and base 4 are regarded as links respectively, and their barycentric position coordinates are respectively (x, z), (x>, z, ( ⁇ 2 ).
- m. the mass of each link respectively, mi, and m 2, the inertial model one instrument I., and I 1 2.
- the moment due to the inertial force of all links is expressed by the following equation (5).
- the two points attached above X and 2 in Eq. (5) indicate that they are second derivatives of X and ⁇ .
- the moment due to gravity of all links is expressed by the following equation (6), where gravity acceleration is g.
- ⁇ ⁇ ⁇ ⁇ * ⁇ ⁇ + mi mi xi ( ⁇ - ⁇ )- ⁇ ( ⁇ -xi) +> mi (a-xi) g
- ZMP is defined as a point on the floor where the moment ⁇ ⁇ is zero. Therefore, if the height of wheel axis 2 is h and the coordinates of ZMP are ( ⁇ , 1 h), then equation (7) gives: By solving this equation (10) for ⁇ zmp, Z MP can be expressed by link position, acceleration and mass.
- FN represents a floor reaction force
- FT represents a rolling friction force
- F represents a composite vector of FN and FT.
- the floor reaction force F N is actually distributed over the entire contact surface of the wheel 3, it is shown in FIG. 8 as being integrated into Z MP. From this figure, the following equation (12) can be obtained if the equation for the balance of moments about the wheel axis 2 is expressed.
- the error E, X f -X. And if E f 0 0 X. In order to displace the motor in the positive direction, move the machine forward with the motor torque Tm negative, and if E f ⁇ 0 move the machine in the negative motor torque Tm to move the motor in the negative direction.
- base 4 has an angle of 0 around the pitch axis.
- the motor torque Tm so as to give ZMP, the ZMP can be made to coincide with the contact point of the wheel 3 and the attitude can be kept stable.
- the coaxial two-wheeled vehicle 1 in the present embodiment is able to realize such load fluctuation as
- the control unit 16 has a control mechanism as shown in FIG. In Fig. 11, in the subtractor 20, the base angle command ⁇ re ⁇ ⁇ ⁇ , which is the attitude command, and the current base angle 0 detected by the gyro sensor 13 and the acceleration sensor 14. And the deviation is supplied to the attitude controller 21.
- the attitude controller 2 1 uses this base angle command ref ref and the current base angle 0. Calculate the motor torque current value Tgyr [A] from the above.
- regulator 2 2 using load pressure sensor 1 5 sensor signal PSPSPS 3> PS 4 , load load torque T!
- a deviation between the torque current value Tgyr of the motor and the estimated load torque current value TZKm is taken, and this deviation is given to the motor 24 as the motor current I [A].
- the motor 24 generates a motor torque Tm by being rotated by the motor current I, and the adder 25 adds the motor torque Tm and the load load torque T and transmits the result to the base 26.
- the coaxial two-wheeled vehicle 1 actually has a control mechanism of a double structure that independently obtains the motor torque for posture stability control and the motor torque for travel control.
- the physical model of such a dual control mechanism is shown in Fig.12. In FIG. 12 as well, for the sake of simplicity, only one wheel 3 will be described.
- Figure 1 2 As shown, various sensors such as gyro sensor 13, acceleration sensor 14, pressure sensor 15, etc. are built in base 4, and motor stator 30, rotary encoder 31 and motor rotor are in the lower part. There are 3 2, and the rotation of the motor evening 2 3 2 is transmitted to the wheel 3 via the speed reducer 3 3 and the joint 3 4.
- the attitude control / adjuster 40 is the present base angle ⁇ detected by the attitude command: base angle command 0 re i, gyro sensor 1 3 and acceleration sensor 1 4. And the sensor signal PSPSPSPS 4 of the pressure sensor 15 calculate the above-mentioned torque T gyr and estimated load torque T> ′.
- the motor controller 41 has the current rotational position of the motor controller 32 detected by the rotational position command Pref of the motor controller 32 which is the traveling command and the motorized encoder 31. Calculate the motor torque for driving from 0 r.
- the motor torque T gyr and the estimated load load torque T, 'and the motor torque for traveling are added, and this sum is supplied to motor gateway 32. .
- the above-mentioned base angle command 0 ref is a target value of the base angle set according to the acceleration A X in the X-axis direction so that the rider can get on stably.
- base 4 is horizontal so that X axis acceleration A x is zero, and when X axis acceleration AX is negative, such that base 4 is inclined forward when X axis acceleration AX is positive.
- Each is set to tilt 4 backward.
- the base angle command 0 ref changes in proportion to the X-axis acceleration A X.
- a block diagram of the control mechanism is shown in Figure 14.
- the base angle command ⁇ ⁇ ref which is the attitude command
- the deviation is supplied to the attitude controller 51.
- the attitude controller 51 has this base angle command 0 ref and the current base angle 0.
- the motor torque T gyr is calculated from and the motor torque T gyr is supplied to the adder 54.
- the subtractor 52 the current rotational position of the motor rotor 5 7 detected by the rotational position command P re ⁇ ⁇ ⁇ of the motor rotor 5 7 which is the traveling command and the rotary encoder 5 8 And the deviation is supplied to the motor controller 53.
- the motor controller 53 calculates the motor torque for traveling from the rotational position command P rei and the current rotational position 0 r, and supplies the motor torque to the adder 54.
- load induced torque T to the base 4, when the applied sensor signal PS ,, PS 2, PSPS pressure sensor 1 5 is supplied to the regulator 5 5, regulator 5 5, based on the sensor signal Calculate the estimated load torque T mentioned above.
- the motor torque Tgyr from the attitude controller 51 and the motor torque from the motor controller 53 are added, and in the subtracter 56, the estimated load weight torque T is calculated from this added value. 'Is subtracted. This is the final torque torque Tm, which is given to the event 5-7.
- the adder 59 the reaction force of the motor torque Tm and the load load torque T are added, and this addition value is given to the motor stator / base 60.
- the motor rotor 57 is controlled to rotate according to the motor torque Tm.
- the rotational position 0 r of the motor rotor 5 7 is converted to 1 / N by the speed reducer 61 having a reduction ratio N: 1 and transmitted to the wheel 3. That is, the rotational position 0 w of the wheel 3 is 1 ZN of the rotational position 0 r of the motor 5 7.
- the rotary encoder 58 detects the rotational position ⁇ r of the motor shutter 57 and supplies a detection signal to the subtractor 52.
- FIG 15 expresses the processing in the block diagram shown in Figure 14 as a mathematical model using the Laplace operator.
- the attitude controller 51 has a base angle command 0 ref and a current base angle 0.
- the motor controller 5 3 is given a deviation between the rotational position command P ref of the motor 5 7 and the current rotational position S r.
- each motor torque is calculated by feedback control that performs PID (proportional • integral ⁇ derivative) calculation. That is, ⁇ ⁇ . , ⁇ , becomes proportional gain, K i. , K i is the integral gain, Kd. , K d is the derivative gain.
- PID proportional • integral ⁇ derivative
- control gains change the followability of the motor in response to the attitude command 0 rei and the travel command Prei. For example, When the proportional gain ⁇ ⁇ , ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ is reduced, the motor gain 5 7 will move with a slow follow-up delay, and the proportional gain ⁇ ⁇ . If, ⁇ , is increased, it will follow at high speed. As described above, by changing the control gain, it is possible to adjust the posture command 0rei, the travel command Prei, and the magnitude of the error of the actual movement and the response time.
- the motor torque obtained by subtracting the estimated load torque 'from the sum of the motor torque from the attitude controller 51 and the motor torque from the motor controller 53 is calculated. Is given, and the rotation angle is 0 r.
- J r is the inertia (inertia) of Mo-Yu-guchi Yui 57
- D r is the viscous drag (damper coefficient) of Mo-ya Yu-bori.
- the mathematical model shown in FIG. 15 is, for example, as shown in FIG. 16 in more detail.
- the attitude controller 70 has a base angle command 0 rei and the current base angle.
- the motor controller 71 generates a motor torque Tgyr for attitude control by performing PID control with respect to the difference between the motor and the motor controller 71, and the motor controller 70 receives the deviation between the rotational position command Pref of the motor 10 and the current rotational position 0r. By performing PID control for this, motion torque for travel control is generated.
- the regulator 72 generates an estimated load torque T from the sensor signal of the pressure sensor 15. In the adder 73, these respective torques are added, and the obtained motor torque Tm is given to the motor 10.
- the motor 10 is rotationally driven by this motor torque Tm, and its rotation is converted into 116 by the decelerator 74 with the reduction ratio 16: 1, and transmitted to the wheel 3.
- FIGS. 12 to 16 have been described assuming that there is one wheel 3 for simplicity, in an actual coaxial two-wheeled vehicle 1 having two left and right wheels 3 R and 3 L, for example, the attitude in FIG. While the controller 51 is commonly used for the left and right wheels 3 R, 3 L, the motor controller 53 is provided independently for the left and right.
- the sensor value ⁇ p may, for example, be a band pass filter whose passband is between 0.1 and 50 Hz.
- BPF 80 is sent to the angle calculator 82, and the sensor value ⁇ ⁇ from the acceleration sensor 14 is, for example, an angle via a mouth pass filter (LPF) 81 having a cutoff frequency of 0.1 Hz. Sent to calculator 82.
- the angle calculator 82 has the current base angle 0 based on these sensor values. Is calculated.
- the subtractor 83 it is the attitude command base angle command 0rei and the current base angle ⁇ .
- the deviation is supplied to the posture controller 84.
- the attitude controller 84 has this base angle command ⁇ rei and the current base angle ⁇ . From the above, calculate the above-mentioned motor torque Tgyr.
- the rotational position command Preir for the right wheel 3 R which is a travel command for the right wheel 3 R
- the motor position 9 3 R detected by the rotary encoder 9 3 R A deviation from the current rotational position ⁇ r is taken and this deviation is fed to the position proportional controller 8 6 R.
- the position proportional controller 86 R performs position proportional (P) control on this deviation and supplies the result of proportional control to the subtractor 8 7 R.
- the differentiator 88 R differentiates the rotational position ⁇ r of the motor rotor 9 2 R supplied from the rotary encoder 9 3 R, and supplies the result of the differentiation to the subtractor 8 7 R.
- the subtractor 8 7 R the deviation between the proportional control result from the position ratio example controller 86 R and the differentiation result from the differentiator 88 R is taken, and this deviation is supplied to the speed proportional controller 8 9 R .
- the speed proportional controller 8 9 R performs speed proportional (P) control on this deviation, and supplies the proportional control result to the adder 9 0 R.
- the adder 9 OR estimated a constant applied load torque 'obtained from the sensor signal PSPS 2) PSPS 4 of the pressure sensor 1 5 In this proportional control result and motion evening torque Tgyr the regulator 94 is added, the added value is current Supplied to control amplifier 91 R.
- the current control amplifier 9 1 R generates a motor current based on the added value to drive the motor 9 2 R.
- the rotational position of the motor rotor 9 2 R is supplied to the differentiator 88 R together with the subtractor 8 5 R. The same applies to the left wheel 3 L, so the description is omitted.
- the coaxial two-wheeled vehicle 1 has a control mechanism for attitude stability control common to the left and right wheels 3 R and 3 L and a control mechanism for left and right independent travel control. Since independent control is performed, posture stability control and travel control can both be stabilized. Next, speed control of the coaxial two-wheeled vehicle 1 in the present embodiment will be described.
- the sensor signals of the four pressure sensors 1 5 to 14 provided at the four corners of the base 4 PSPSPSPS 4 to the center of gravity coordinates of the load on the base 4 (X g, Yg) and detects its load weight W s, load induced torque T, but seeking further the barycentric coordinates (X g, ⁇ 8) direction you travel, the speed control command Used as
- the speed command VX is changed as shown in FIG. 18 based on the X coordinate X g of the center of gravity position.
- the range from X 3 to X is the stop region, and within this range, the commanded traveling speed is made zero.
- This stop area is preferably in the X-coordinate range of the contact surface of the wheel 3 with the road surface. In this case, for example, when the load weight W g is large or the gas pressure of the wheel 3 is low, the contact area of the wheel 3 with the road surface is large, and the range of the stop area is also large.
- the commanded velocity increases according to the size of the X coordinate until the maximum forward velocity S iMAX is reached. Also, when the X coordinate becomes X 2 or more, the motor is forcibly decelerated to a stop, and is stopped until the posture is stabilized in the stop area again. As described above, by providing the area for decelerating and stopping forcibly, it is possible to ensure the safety of the passenger when traveling at the maximum speed. Similarly, when the X coordinate becomes ⁇ 3 or less, the commanded velocity increases in accordance with the size of the X coordinate until the maximum backward velocity Sb MAX is reached. The maximum backward speed SbMAX is preferably smaller than the maximum forward speed S ⁇ . In addition, when the X coordinate becomes ⁇ 4 or less, the motor is forcibly decelerated and stopped, and is stopped until the posture is stabilized in the stop area again.
- Vref (t) (l / 4> 4 - (2/3) At * t 3 + (l / 2) At 2 * t 2 + Vx.
- the turning speed command V r can be changed based on the Y coordinate Y g of the center of gravity position.
- the range from 1 to Y is the stop area, and within this range, the commanded turning speed is made zero.
- This stop area can be arbitrarily set near the origin O. By setting the stop area (dead zone) in this way, it is possible to prevent the aircraft from turning due to a slight movement of the center of gravity unintended by the passenger.
- the Y coordinate exceeds Y 1
- the commanded turning velocity increases according to the size of the Y coordinate until the clockwise maximum velocity CWMAX is reached.
- the Y-coordinate becomes less than or equal to -Yi
- the commanded turning velocity is increased according to the size of the Y-coordinate until the counter-clockwise maximum velocity C CWMAX is reached.
- Y coordinate is Y! Or more-Y!
- the rotational position command Rreir of the motor 1 OR and the rotational position command R reil of the motor 10 L are generated according to the Y coordinate Y g .
- the rotational position command Rreir of the motor 10 R and the rotational position command Rrefl of the motor 10 L are, for example, reverse phase commands as shown in the following equation (22).
- G 1 is a positive constant gain, and can be variable according to, for example, the load weight W g .
- the actual traveling direction is detected by the gyro sensor 13 which detects the angular velocity yaw around one axis, and the rotational speeds of the left and right motors 1 OR, 10 L are independently made. By controlling, the difference between the target direction and the actual running direction is eliminated.
- the left wheel 3 L has a shorter effective diameter than the right wheel 3 R, and as shown in FIG. 20, oyaw, [rad / se c] are used as gyro sensor signals around one axis when going straight.
- Vref is the average of rotational speed commands Vreir and Vrefl.
- Vref r Vref 0 1 K 0 * c yawl ⁇ ⁇ ⁇ (25)
- Vref 1 Vref 0 + ⁇ 0 * ⁇ ) , 3 1 1 (26)
- Vref r Vref 0- K. (Dref- ⁇ yawl (27)
- Vrefl Vref 0 + K Q ( Dr e f - c y y a a w w l l) Bruno ... (28)
- the rotational speed commands Vreir and Vrefl thus obtained are converted into rotational position commands Preir and Prefl of the wheel by the following equations (29) and (30), respectively.
- k is an integer representing the number of samplings
- P ref (k) indicates a rotational position command in k sampling.
- Rref l (k) Prefl (k) + Vref. ... ( 30)
- the turning speed may be deviated due to the difference in the gas pressure of the left and right wheels 3 R, 3 L or the difference in the road surface condition.
- the actual turning speed is detected by the gyro sensor 13 that detects the angular velocity ⁇ yaw around the yaw axis, and the rotational speeds of the left and right motors 1 0 R and 1 0 L are independently controlled. The deviation between the target turning speed and the actual turning speed can be eliminated.
- Equation (32), in (3 3), G 3 is a positive constant gain may be variable in accordance with the example the load weight W s.
- Rref r Prefr + Y g * G 2 - ⁇ 6 ⁇ * G 3 , ⁇ ⁇ 02)
- Rref 1 Pref 1-Y g * G 2 + ⁇ ⁇ ⁇ ⁇ * G 3 ⁇ ⁇ ⁇ (33)
- the actual traveling direction and the turning speed are detected by the gyro sensor 13 that detects the angular velocity ⁇ yaw about the first axis.
- the rotational speed of 0 L By independently controlling the rotational speed of 0 L, it is possible to eliminate the deviation between the target direction (turning speed) and the traveling direction (turning speed).
- the acceleration sensor 14 for detecting the linear acceleration A z in the Z-axis direction is used, and the command traveling speed is reduced when the acceleration change in the Z-axis direction occurs. , To reduce the impact force on the aircraft.
- V x (k) V x (kl) -K a0 * A : (34)
- the absolute value IA z I of the acceleration A z is the threshold A. If it is less than, the driving speed Vx Acceleration is performed according to the following equation (35), for example, until the maximum value set based on the absolute value
- K a is a positive constant.
- V x (k) V x (kl) + K al -"(35)
- the acceleration sensor 14 for detecting the linear acceleration Az in the Z-axis direction is used, and when there is a change in acceleration in the Z-axis direction, for example, In this case, reducing the traveling speed Vx can reduce the impact force to the aircraft.
- a gyro sensor 13 may be used instead of the acceleration sensor 14.
- the coaxial two-wheeled vehicle 1 can travel while performing posture stability control, but by providing the image recognition means and the voice recognition means as described below, further higher-order functions can be realized. be able to.
- the passenger visually determines the traveling direction, but when the traveling speed increases, the point of view of the passenger is directed far, so the condition of the road surface under the foot disappears, and the vehicle falls over due to unevenness or step on the road surface.
- the coaxial two-wheeled vehicle 1 travels autonomously, if the road surface unevenness or obstacles on the road surface can not be detected, there is a risk that the vehicle may collide with the obstacle or the vehicle may become unstable and fall. . Therefore, in the coaxial two-wheeled vehicle 1 according to the present embodiment, as shown in FIG. 22A, two C CD cameras 17 (17 R and 17 L) are mounted on the base 4 close to the road surface.
- the road surface environment closer to the triangulation method for example, the size of the obstacle OB or the unevenness of the road surface. And position can be detected. This makes it possible to avoid the road surface environment in which the vehicle can not run and to avoid obstacles on the road surface without contact. It is also possible to identify an object specified by image recognition, for example, a moving object such as a human, and make it travel following it. Further, in the coaxial two-wheeled vehicle 1 according to the present embodiment, as shown in FIG. 23A, two microphones 18 (18 R and 18 L) are mounted on the base 4 close to the road surface.
- Microphones 18 R and 18 L can be used to estimate the direction and distance of sound source SD as shown in FIG. 23 B. This makes it possible, for example, to respond to the sound source or turn the wheel 3 to face in the direction of the sound source. Also, if the aircraft is approaching the sound source, stopping the traveling can prevent a collision with the sound source. Furthermore, by applying speaker recognition using a speech signal, for example, the user's voice is registered in advance, and when the voice is recognized, the LED is lighted or a voice is emitted. The aircraft's recognition in case of theft, and when many similar aircraft are aligned, it is possible to sort the aircraft by the user's voice.
- the frequency component of the noise signal stored in advance in the memory is removed from the voice signal on which the noise is superimposed.
- a sound source is estimated based on the removed audio signal.
- audio signals detected by the left and right microphones 1 8 R and 1 8 L are converted into digital signals by an analog-to-digital converter (ADC) 1 0 OR, 1 0 0 L. Is supplied to the subtractor 1 0 1 R, 1 OIL.
- ADC analog-to-digital converter
- noise signals at various traveling speeds are stored in advance in the noise signal database 102. When the current traveling speed signal is input to the noise signal database 102, the traveling speed is determined. The noise signal corresponding to is read out and supplied to the subtractor 1 0 1 R, 1 0 1 L. In the subtractor 10 1 R, 1 O I L, the frequency component of this noise signal is removed from the audio signal supplied from the analog / digital converter 1 00 R, 1 00 L.
- the speech recognition unit 103 uses the speech signal from which the frequency component of the noise signal has been removed to obtain the position coordinates (X s, Y s, Z s) of the sound source, and also uses the speaker database 104 A speaker who has made speech is identified, and source position coordinates (X s, Y s, Z s) and a speaker identification signal are supplied to a target coordinate transformation unit 105.
- the target coordinate conversion unit 105 is, for example, The sound source position (Xs, Ys) in the X-Y coordinate system is set as the target position (Xrei, Yref), and this travel position command (Xref, Yref) and the travel speed command Vref are output.
- Hardware ⁇ Layer 150 is a hierarchy of circuits, including, for example, motor control circuits, central control circuits, and control circuits for sensor circuits.
- the kernel layer 15 1 is a hierarchy that performs various operations such as motor servo operation, attitude control operation, travel control operation, and real-time travel target value operation.
- This hardware ⁇ Layer 1 5 0 and Force 1 ⁇ Layer 1 5 1 constitute a hierarchy 1 6 0 of attitude travel control.
- On-Body ⁇ Layer 1 52 is a layer that performs voice recognition, image recognition, target value calculation, obstacle avoidance trajectory generation, etc., and is shown in Figure 2 2 A and 2 2 B, and Figure 2 3 A and 2 The obstacle avoidance described above in 3 B, following the target, traveling to the sound source, etc. are executed on this hierarchy.
- its upper network 'layer 1 53 is a network communication interface, travel control information, network communication of image and voice information, travel plan management of aircraft, man-machine interface with passengers, or 3D image. Includes recognition database management, etc.
- the topmost application layer, layer 1 54 is a layer that carries out remote control by network communication, and the interaction between the passenger and the aircraft.
- This on-body ⁇ layer 1 52, network ⁇ layer 1 5 3 and application ⁇ layer 1 5 4 constitute a hierarchy 1 61 of upper control.
- control period is as short as 0.1 msec in hardware layer 1 50 of the lowest layer, 1 msec in power channel layer 1 5 1, on-body layer 1 It has a long cycle of 1 0 msec for 5 2, 1 0 Omse (; for network layerer 1 5 3), and l sec ⁇ l 0 0 msec for the top layer application 'layer 1 5 4.
- the sensor circuit 200 also includes sensor signals ⁇ ⁇ and coyaw from a gyro sensor that detects angular velocity around the pitch axis and around the y axis, linear acceleration in the X, ⁇ , and Z directions and the pitch axis
- the sensor signals Ax, Ay, Az, ap, r, ayaw from the acceleration sensor 14 for detecting the angular acceleration around the roll axis and the yaw axis are supplied to the control unit 16 together.
- audio signals from the microphones 18 R and 18 L are supplied to the audio processing circuit 201, and images from the C CD camera 17 R and 17 L are supplied to the image processing circuit 202.
- a signal is supplied.
- the audio processing circuit 201 and the image processing circuit 202 supply the audio signal and the image signal to the control device 1 ⁇ .
- the control device 16 generates the motor torque Tgyr and the rotational position command Pre f of the motor port which is the traveling command as described above based on these sensor signals, audio and image signals, and Motor driver Supply to 2 0 3 R, 2 0 3 L
- the motor driver 2 0 3 R, 2 0 3 L is based on this motor torque T gyr, the rotational position command Prei of the motor rotor, etc., for example, the motor 1 0 R, 1 0 L Calculate the optimum mon- itor current for driving the motor and supply it to the motor 10 R and 10 L.
- the rotational position of this motor 1 0 R, 1 0 L is determined by the rotor encoder 1 1 R, 1 1 L and is fed back to the motor driver 2 0 3 R, 2 0 3 L.
- the switch / power switch 204 is connected to the control unit 16 and the power switch 220, and the signal from the power switch 205 is supplied to the power control circuit 206.
- the power management circuit 206 is connected to the battery 207 and supplies a control voltage of 24 V to the control unit 16, the audio processing circuit 201 and the image processing circuit 202.
- supply motor power to the motor driver 2 0 3 R, 2 0 3 L.
- the power management circuit 2 0 6 is supplied with motor power 1 0 R, 1 0 L regenerative power via the motor driver 2 0 3 R, 2 0 3 L, and the power management circuit 2 0 6 Charge the battery 2 0 7 using.
- the sensor circuit 200 receives the sensor signals PSPS 2 and PSPS 4 from the pressure sensor 15 and the gyro sensor 13
- the sensor signals ⁇ ⁇ , coyaw, and sensor signals A x, A y, A z, ap, ar, a yaw from the acceleration sensor 14 are supplied.
- the sensor circuit 200 performs gain adjustment of the sensor signal PS,, PSPSPS 4 from the pressure sensor 15 with a pressure gain of, for example, 1 Omv / N, and further converts it into a digital signal through an analog-digital converter (not shown).
- the sensor circuit 2 0 0 adjusts the gain of the sensor signal ⁇ p, coyaw from the gyro sensor 1 3 with, for example, the posture gain of 1 6 V adsec 1 1 and the sensor signal A x, from the acceleration sensor 1 4
- Ay, Az, p, r, ayaw are gain-adjusted with an attitude gain of 1.6 V / radsec- 2 , for example, and then converted to a digital signal through an analog-digital converter (not shown), Supply to processing unit 21 1.
- This signal pre-processing unit 2 1 1 applies a digital filter to the input signal, offset adjustment, attitude position, ie base angle 0. Perform pre-processing to calculate.
- the center of gravity calculation unit 2 1 0 calculates the center of gravity position coordinates (Xg, Yg) of the load on the base 4 and its load weight Wg as described above based on the sensor signal PSPSPSPS 4 from the pressure sensor 15 ⁇
- This center of gravity position coordinates (Xg, Yg) and load weight Wg information is supplied to the travel command calculator 2 1 2 as well as information on the Y position Yg of center of gravity position and load weight Wg Supply to 15.
- the traveling command calculator 2 1 2 generates a speed command Vx based on, for example, the gravity center position X coordinate 1 traveling speed characteristic as shown in FIG.
- the rotation speed command Vref (t) is generated by performing the above-described fifth-order function calculation based on x.
- the rotational speed command generator 2 1 3 supplies the rotational position command Pref (t) to the rotational position command generator 2 1 4, the turning command generator 2 1 5 and the attitude command generator 2 1 6.
- the turning command generator 2 1 5 is a Y-coordinate Y g of the center-of-gravity position supplied from the center-of-gravity calculation unit 2 1 0 and a load weight Wg, a rotation angle about one axis supplied from the signal pre-processing unit 2 1 1 speed oyaw , And a rotational speed command generator (eg, Y g * G) at the time of turning based on the rotational speed command Vref (t) supplied from the rotational speed command generator 2 13, this phase command is used as a rotational position command generator Supply to 2 1 4
- the rotational position command generator 2 1 4 integrates the rotational speed command Vref (t) supplied from the rotational speed command generator 2 1 3 to generate a rotational position command Prei (t).
- the rotational position command generator 214 generates rotational position commands Preir (t) and Prefl (t) in consideration of the phase command from the turn command generator 215.
- the voice processing circuit 201 supplies a voice signal from the microphone port phone 18 to the voice recognition unit 2 19 of the control device 16.
- the speech recognition unit 2 19 performs, for example, processing of estimating the sound source position coordinates and the speaker based on the sound signal, and generates a traveling position command whose traveling source is the sound source position.
- the image processing circuit 202 also supplies the image signal from the CCD camera 17 to the obstacle avoidance unit 220 of the control device 16.
- the obstacle avoidance unit 220 detects an obstacle on the road surface based on the image signal, and generates a traveling position command for avoiding the obstacle.
- the above-mentioned rotational position command generator 2 1 4 receives rotational position commands Prefr (t) and Prefl (t) based on travel position commands from the voice recognition unit 2 1 9 and obstacle avoidance unit 2 2 0. It can also be generated.
- Attitude command generator 2 16 is based on rotational speed command Vref (t) supplied from rotational speed command generator 2 1 3 and, as described with reference to FIG. Is calculated and this base angle command S rei is supplied to the subtractor 2 1 7.
- the current base angle 0 obtained by the signal pre-processing unit 2 1 1 from this base angle command 0 ref. Is subtracted and the deviation is supplied to the attitude controller 2 1 8.
- the attitude controller 2 1 8 performs PID control based on this deviation to obtain the motor torque Tgyr.
- the P1 gain may be changed according to the load weight Wg on the base 4. Specifically, it is preferable to increase the relative gain and decrease the integral gain as the load weight Wg increases.
- the attitude control unit 2 1 8 supplies this motor torque Tgyr to the left and right motor drivers 20 3 R and 2 0 3 L.
- the motor 1 detected by the rotational position command Preir which is the travel command for the motor 1 0 R
- the rotary encoder 1 1 R A deviation of 0 R from the current rotational position 0 r is taken and this deviation is fed to the position proportional controller 2 3 1 R.
- the position proportional controller 2 3 1 R performs position proportional (P) control on this deviation and supplies the result of proportional control to the subtractor 2 32 R.
- the differentiator 2 33 R differentiates the rotational position 0 r of the motor 1 0 R supplied from the universal encoder 1 1 R, and supplies the differentiation result to the subtractor 2 3 2 R.
- And subtraction Unit 2 3 2 R takes the deviation between the proportional control result from position proportional controller 2 3 1 R and the derivative result from differentiator 2 3 3 R, and this deviation is a velocity proportional ⁇ integral controller 2 3 4 Supplied to The speed proportional ⁇ integral controller 2 3 4 R performs speed proportional ⁇ integral (PI) control on this deviation, and supplies the result of proportional ⁇ integral control to the adder 2 35 R.
- the proportional / integral control result and the motor torque T gyr are added, and the added value is supplied to the current control amplifier 2 3 6 R.
- the current control amplifier 2 36 R generates a motor current based on the added value, and drives, for example, a 2 0 0 W motor 1 0 R.
- the rotational position of the motor 10 R is supplied to the differentiator 2 3 3 along with the subtractor 2 3 0 R. The same applies to the left wheel 3 L, so the description is omitted.
- the power management circuit 206 is connected to a battery 24 of 24 V, and supplies power for control of 24 V and 1 A to the control device 16 and a motor driver 2 0 Supply motor power of 24 V and 30 A to 3 R and 2 0 3 L respectively.
- the power management circuit 2 0 6 is supplied with the regenerative power of the motor 1 0 R 1 10 L via the motor driver 2 0 3 R 2 0 3 L, and the power management circuit 2 0 6 Charge battery 2 0 7 with power.
- the motor torque T gyr for performing angle control of the base 4 using the gyro sensor 13 and the acceleration sensor 14 and the pressure sensor 15 A motor torque is generated to perform traveling control using a position controller common to the left and right wheels 3 R and 3 L that generates a motor torque T, 'that cancels the load torque, and the pressure sensor 15 Since an independent motor controller is provided to perform independent control, both posture stability control and travel control can be stably achieved.
- travel control is performed according to the barycentric coordinates of the load on the base 4, but the stop area (dead zone) in the X coordinate range and Y coordinate range of the contact surface with the road surface of the wheel 3 Because of the provision of, it is possible to prevent the aircraft from moving forward ⁇ backward ⁇ turning by slight movement of the center of gravity unintended by the passenger.
- the actual traveling direction and the turning speed are detected by the gyro sensor 13 which detects the angular velocity c yaw around the yaw axis, and the rotation of the left and right motors 10 R and 10 L
- the target direction turning speed
- the difference between the degree of travel and the direction of travel turning speed
- the acceleration sensor 14 for detecting the linear acceleration Az in the Z-axis direction is used, and the acceleration change in the Z-axis direction occurs.
- reducing the traveling speed V x can reduce the impact force on the aircraft.
- the turning speed command V r is changed based on the Y coordinate Y g of the center-of-gravity position on the base 4, but the invention is not limited thereto. It does not matter if you give it a sex.
- a potentiometer can be built into the base 4 and this rotational angle PM can be used in place of the Y coordinate Y g of the center of gravity. Also in this case, it is preferable to set a stop area (dead zone) in the same manner as described above.
- the first torque for offsetting the torque due to the load on the base detected by the load detection means consisting of a plurality of pressure sensors, for example A second torque for maintaining the base at a predetermined angle corresponding to an angle around the wheel axis of the base detected by an angle detection unit including a sensor and an acceleration sensor, and traveling according to the position of the load
- To generate a third torque and command the operation of the first to third torques to each of a pair of drive motors to drive a pair of wheels, so it is stable against load weight change.
- posture control and travel control can be stably achieved at the same time.
- the position of the load on the base is within a predetermined stop area, for example, an area in which the range in the direction perpendicular to the wheel axis is in the range perpendicular to the wheel axis of the contact area where the pair of wheels contact the road surface. If it is inside, it does not send a travel command, and if it is out of the stop area, it sends a travel command according to its position, so that the passenger's unintended By moving the center of gravity, you can prevent the aircraft from moving forward / backward.
- a predetermined stop area for example, an area in which the range in the direction perpendicular to the wheel axis is in the range perpendicular to the wheel axis of the contact area where the pair of wheels contact the road surface.
- a running instruction to decelerate and stop is sent.
- the posture can be stabilized again even if the position of the center of gravity largely deviates, and safety can be maintained.
Abstract
Description
Claims
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US10/558,418 US7703568B2 (en) | 2003-06-12 | 2004-06-03 | Coaxial motorcycle |
EP04735977A EP1632428A4 (en) | 2003-06-12 | 2004-06-03 | COAXIAL MOTORCYCLE |
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US (1) | US7703568B2 (ja) |
EP (1) | EP1632428A4 (ja) |
WO (1) | WO2004110854A1 (ja) |
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JP2007011634A (ja) * | 2005-06-29 | 2007-01-18 | Toyota Motor Corp | 移動台車の制御方法及び移動台車 |
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EP1788469A4 (en) * | 2005-06-29 | 2011-11-30 | Toyota Motor Co Ltd | CONTROL METHOD FOR LOAD MOVEMENT |
US8155828B2 (en) | 2005-06-29 | 2012-04-10 | Toyota Jidosha Kabushiki Kaisha | Control method of traveling dolly |
FR2895359A1 (fr) * | 2005-12-22 | 2007-06-29 | Jannick Simeray | Plateforme motorisee pour pieton |
US8014923B2 (en) * | 2006-11-15 | 2011-09-06 | Toyota Jidosha Kabushiki Kaisha | Travel device |
CN105189273A (zh) * | 2013-05-07 | 2015-12-23 | 丰田自动车株式会社 | 倒立型移动体及其控制方法 |
CN105189273B (zh) * | 2013-05-07 | 2017-12-12 | 丰田自动车株式会社 | 倒立型移动体及其控制方法 |
CN106990783A (zh) * | 2017-04-21 | 2017-07-28 | 歌尔科技有限公司 | 一种控制双轮机器人直线行走的方法和系统 |
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Also Published As
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US7703568B2 (en) | 2010-04-27 |
EP1632428A1 (en) | 2006-03-08 |
EP1632428A4 (en) | 2010-08-25 |
US20060231313A1 (en) | 2006-10-19 |
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