Abstract: In a mobile vehicle 1 having a vehicle body 2, a front wheel 3f, and a rear wheel 3r, the steering control wheel 3f can be steered by a steering actuator 8 about a steering axis Csf which is tilted backward. The steering actuator 8 is controlled by a control device 15. The height a, from a ground surface 110, of the intersection point Ef of the steering axis Csf of the steering control wheel 3f and a virtual straight line connecting the ground contact point of the steering control wheel 3f and the center of axle of the steering control wheel 3f in a basic posture state of the mobile vehicle 1 is set to satisfy a prescribed condition.

Abstract: A mobile vehicle 1A includes a front-wheel support mechanism 4 having a trail adjustment mechanism 9, a steering actuator 8 which generates a steering force for steering a front wheel 3f, a trail adjustment actuator 15 which generates a driving force for changing a trail of the front wheel 3f, and a control device 50. The control device 50 has a function of controlling the steering actuator 8 so as to stabilize the posture of a vehicle body 2, and a function of controlling the trail adjustment actuator 15 in accordance with an observed value of the vehicle speed.

Abstract: An upper body motion measurement system 1 has a plurality of inertia sensor units 2, each of which incorporating an angular velocity sensor 4 and an acceleration sensor 5. The plurality of the inertia sensor units 2 is attached to places that are different from each other on the upper body of a subject P. Based on the detection outputs of the angular velocity sensor 4 and the acceleration sensor 5, the attitude of each of the inertia sensor units 2 is estimated, and the acceleration thereof is further estimated. The angular acceleration of the upper body of the subject P is estimated based on the estimated accelerations of the plurality of the inertia sensor units 2.

Abstract: A device that can stably and accurately estimate the roll angle of a vehicle body during various states of movement of the vehicle body. A roll angle estimated value calculation portion calculates an estimated value of the roll angle by integrating a value obtained by correcting an estimated value of roll angle velocity of a vehicle body by use of a correction value, or by correcting a value obtained by integrating an estimated value of roll angle velocity by use of a correction value. The correction value is calculated by use of a detection value of speed of the vehicle body in the traveling direction, detection values of angular velocity and acceleration detected by sensors mounted on the vehicle body, a previous estimated value of the roll angle, and a previous estimated value of the pitch angle of the vehicle body.

Abstract: In a mobile vehicle 1A having a front wheel 3f and a rear wheel 3r, the steered wheel 3f can be steered by an actuator 8. A control device 15 controls the actuator 8 so as to stabilize the inclination angle ?b in the roll direction of the vehicle body 2 and the steering angle ?f of the steered wheel 3f. The control device 15 causes a ratio between the sensitivity of the steering of the steered wheel 3f to the change in observed value of the inclination angle ?b and the sensitivity of the steering of the steered wheel 3f to the change in observed value of the steering angle ?f to be changed in accordance with the traveling speed of the mobile vehicle 1A.

Abstract: In a mobile vehicle 1 having a vehicle body 2, a front wheel 3f, and a rear wheel 3r, the steering control wheel 3f can be steered by a steering actuator 8 about a steering axis Csf which is tilted backward. The steering actuator 8 is controlled by a control device 15. The height a, from a ground surface 110, of the intersection point Ef of the steering axis Csf of the steering control wheel 3f and a virtual straight line connecting the ground contact point of the steering control wheel 3f and the center of axle of the steering control wheel 3f in a basic posture state of the mobile vehicle 1 is set to satisfy a prescribed condition.

Abstract: In a mobile vehicle 1A having a front wheel 3f and a rear wheel 3r, the steered wheel 3f can be steered by an actuator 8. A control device 15 controls the actuator 8 so as to stabilize the inclination angle ?b in the roll direction of the vehicle body 2 and the steering angle ?f of the steered wheel 3f. The control device 15 causes the sensitivity of the steering of the steered wheel 3f to the change in observed value of the inclination angle ?b to be changed in accordance with the steering angle of the steered wheel 3f.

Abstract: A road surface friction coefficient estimating device includes a means which finds a first estimated value Mnsp_estm of an external force to be compared (S102 to S116, S118-2), a means which finds a second estimated value Mnsp_sens (S118-1), and a plurality of increasing/decreasing manipulated variable determining means 34_k, each of which determines the increasing/decreasing manipulated variable ??_k of the friction coefficient estimated value on the basis of the first estimated value Mnsp_estm and the second estimated value Mnsp_sens, and updates the friction coefficient estimated value according to ??_k. The increasing/decreasing manipulated variable determining means 34—1 and 34—2 determine ??—1 and ??—2 according to a deviation in filtering value between the first estimated value and the second estimated value, and the increasing/decreasing manipulated variable determining means 34—3 determines ??—1 according to the deviation between the first estimated value and the second estimated value.

Abstract: A joint mechanism 4 has a zigzag structure 13 extending in a zigzag pattern between a first member 11 and a second member 12. A flexible lengthy member 16 fixed to the first member 11 extends from the first member 11 toward the second member 12 and is travelable with respect to the second member 12. A tension application unit 30 that applies a tension to the flexible lengthy member 16 is configured to be capable of changing a tension to apply.

Abstract: An inverted pendulum type vehicle having a tiltable rider mounting section includes a first travel operation unit and a second travel operation unit, which are disposed with an interval provided therebetween in the longitudinal direction and which are capable of traveling in all directions, and an operation device which outputs a turn command. In the case where the turn command is output from the operation device in a situation wherein at least the first travel operation unit is traveling in the longitudinal direction or at rest, the moving velocity of the ground contact point of the first travel operation unit and the moving velocity of the ground contact point of the second travel operation unit in the lateral direction of a rider are controlled to have velocities that are different from each other.

Abstract: An inverted pendulum type vehicle with a tiltable rider mounting section has a first travel operation unit and a second travel operation unit, which are disposed with an interval provided therebetween in the longitudinal direction and which are capable of traveling in all directions. In a situation wherein a predetermined representative point of the vehicle or the first travel operation unit is to be moved rightward or leftward, the traveling operations of the first travel operation unit and the second travel operation unit are controlled such that the travel velocity of the first travel operation unit and the travel velocity of the second travel operation unit in the lateral direction are different from each other.

Abstract: An inverted pendulum type vehicle includes a control device which sets a target turning angular velocity ?z_cmd to a nonzero value not only when a predetermined steering operation is performed but also at least in an external force application state in which an external force for turning the vehicle about a yaw axis is applied to the vehicle. The control device controls a first actuator device and a second actuator device such that a second moving operation unit has a different velocity from a first moving operation unit in a left-right direction. Such an inverted pendulum type vehicle makes it possible to turn the vehicle easily even in a state in which no steering operation is performed.

Abstract: A device for estimating the state quantity of a skid motion of a vehicle is provided with an element which finds road surface reaction force model values of respective wheels and a skid motion state quantity model value using a vehicle model including a friction characteristic model between the wheels and the road surface, an element which finds the deviation between the lateral acceleration model value generated in a predetermined position of the vehicle by the resultant force of the road surface reaction force model values and the lateral acceleration detected value indicated by the output of an actual lateral acceleration detecting means, and an element which determines, as the estimated value of the skid motion state quantity, a value obtained by adding a value obtained by passing the deviation through a filter having a high-cut characteristic to the skid motion state quantity model value.

Abstract: A two-wheeled vehicle 1 includes a steering section 6 which steers a front wheel 4. The steering section includes a steering shaft link 13 which turns about a first steering axis 10 together with a second steering axis 11, a front-wheel support section 14 which turns the front wheel 4 about the second steering axis 11, and a first motor 15 which causes the steering shaft link 13 to turn. A caster angle ? based on the first steering axis 10 is positive or 0. A trail t1 based on the second steering axis 11 is positive. When the two-wheeled vehicle 1 is in a basic posture state on a ground surface 12, the intersection point P3 of the second steering axis 11 and the ground surface 12 lies in front of the intersection point P2 of the first steering axis 10 and the ground surface 12.

Abstract: An inverted pendulum type vehicle prevents a travel operation unit from running at a high velocity when not in contact with the ground. A ground contact point velocity detector integrates a ground contact point horizontal acceleration calculated by a ground contact point horizontal acceleration calculator so as to calculate the acceleration at the ground contact point of a wheel. A determiner calculates a ground contact point velocity. The determiner sets a velocity threshold value on the basis of the velocity difference between the ground contact point velocity and a first desired velocity. If the first desired velocity reaches the velocity threshold value or more, then the determiner decides that the wheel of a first travel operation unit is idling and restricts the setting of the first desired velocity by a first control processor to the velocity threshold value or less.

Abstract: A mobile vehicle 1A includes a front-wheel support mechanism 4 having a trail adjustment mechanism 9, a steering actuator 8 which generates a steering force for steering a front wheel 3f, a trail adjustment actuator 15 which generates a driving force for changing a trail of the front wheel 3f, and a control device 50. The control device 50 has a function of controlling the steering actuator 8 so as to stabilize the posture of a vehicle body 2, and a function of controlling the trail adjustment actuator 15 in accordance with an observed value of the vehicle speed.

Abstract: In a mobile vehicle 1 having a vehicle body 2, a front wheel 3f, and a rear wheel 3r, the steered wheel 3f can be steered by a steering actuator 8 about a steering axis Csf which is tilted backward. A control device 15 controls the steering actuator 8, on the basis of a dynamics model of the mobile vehicle 1A configured by a mass point system having an inverted pendulum mass point 123 and a ground surface mass point 124, so as to stabilize a motional state quantity of the inverted pendulum mass point 123 and a motional state quantity of the steering angle of the steered wheel 3f.

Abstract: In a wheel for use in an omni-directional vehicle, gravel and other foreign matters are prevented from being trapped between free rollers forming the wheel, and traveling vibrations and noises are minimized at the same time. The wheel includes an annular member and a plurality of free rollers each rotatably supported by the annular member around a corresponding tangential line of the annular member, and a gap member is placed between each adjacent pair of the free rollers to fill a gap defined between the free rollers.

Abstract: In a mobile vehicle 1A having a front wheel 3f and a rear wheel 3r, the steered wheel 3f can be steered by an actuator 8. A control device 15 controls the actuator 8 so as to stabilize the inclination angle ?b in the roll direction of the vehicle body 2 and the steering angle ?f of the steered wheel 3f. The control device 15 causes a ratio between the sensitivity of the steering of the steered wheel 3f to the change in observed value of the inclination angle ?b and the sensitivity of the steering of the steered wheel 3f to the change in observed value of the steering angle ?f to be changed in accordance with the traveling speed of the mobile vehicle 1A.

Abstract: In a mobile vehicle 1A having a front wheel 3f and a rear wheel 3r, the steered wheel 3f can be steered by an actuator 8. A control device 15 controls the actuator 8 so as to stabilize the inclination angle ?b in the roll direction of the vehicle body 2 and the steering angle ?f of the steered wheel 3f. The control device 15 causes the sensitivity of the steering of the steered wheel 3f to the change in observed value of the inclination angle ?b to be changed in accordance with the steering angle of the steered wheel 3f.