Other

Sony Corporation

Jinichi Yamaguchi

Yuichi Hattori

Tatsuzo Ishida

Yoshihiro Kuroki

Naoto Mori

Kunihito Sawai

Junichi Yamaguchi

A legged mobile robot possesses degrees of freedom which are provided at roll, pitch, and yaw axes at a trunk. By using these degrees of freedom which are provided at the trunk, the robot can smoothly get up from any fallen-down posture. In addition, by reducing the required torque and load on movable portions other than the trunk, and by spreading/averaging out the load between each of the movable portions, concentration of a load on a particular member is prevented from occurring. As a result, the robot is operated more reliably, and energy is used with greater efficiency during a getting-up operation. The invention makes it possible for the robot to independently, reliably, and smoothly get up from various fallen-down postures such as a lying-on-the-face posture, a lying-on-the-back posture, and a lying sideways posture.

Legged mobile robot and method of controlling operation of the same

A humanoid robot including upper limbs, lower limbs, and a trunk. Hip joints which connect the lower limbs and the trunk each possess degrees of freedom provided in correspondence with a hip joint yaw axis, a hip joint roll axis, and a hip joint pitch axis. The humanoid robot is a leg-movement-type robot which walks on two feet. By arbitrarily offsetting the hip joint yaw axes in a roll axis direction, the effects of the movement of the center of gravity occurring when the mode of use of the robot is changed are accommodated to in order to flexibly balance the weights of the upper and lower limbs. The waist is made more compact in order to form a humanoid robot which is well proportioned and which makes it possible to prevent interference between the left and right feet when the direction of a foot is changed. Accordingly, a robot which moves naturally and in a way sufficiently indicative of emotions and feelings using fewer degrees of freedom is provided.

Robot and joint device for the same

A legged mobile robot controls the posture of the body thereof in a stable manner using a ZMP stability determination criterion with a relatively long sampling period. The legged mobile robot has a stable ZMP region which is a supporting polygon formed of the ground contact point of a sole of a movable leg and a walking surface, and a ZMP behavior space in which a momentum of the robot body is generated so that the ZMP shifts to the approximate center of the stable ZMP region. In the ZMP behavior space, the momentum of the robot shifts in a positive direction or in a negative direction. In the negative direction, a space distortion shifts the ZMP to the periphery of the stable region, and in the positive direction, a space distortion shifts the ZMP to the center of the stable region.

Legged mobile robot and control method thereof, leg structure of legged mobile robot, and mobile leg unit for legged mobile robot

A legged mobile robot possesses degrees of freedom which are provided at roll, pitch, and yaw axes at a trunk. By using these degrees of freedom which are provided at the trunk, the robot can smoothly get up from any fallen-down posture. In addition, by reducing the required torque and load on movable portions other than the trunk, and by spreading/averaging out the load between each of the movable portions, concentration of a load on a particular member is prevented from occurring. As a result, the robot is operated more reliably, and energy is used with greater efficiency during a getting-up operation. The robot independently, reliably, and smoothly gets up from various fallen-down postures such as a lying-on-the-face posture, a lying-on-the-back posture, and a lying sideways posture.

A legged mobile robot having having at least a plurality of movable legs. This robot includes, in addition to a road surface touching sensor for confirming the ground touching state between the foot part and the road surface, a relative movement measurement sensor for measuring the relative movement between the foot part and the road surface. The robot has its operation controlled on the basis of the amount of relative movement between the foot part and the road surface, so that, when an offset is produced between the intended or scheduled trajectory and the actual trajectory, the operation may be controlled adaptively to execute the robot operation.

Robot moving on legs and control method therefor, and relative movement measuring sensor for robot moving on legs

A legged mobile robot possesses degrees of freedom which are provided at roll, pitch, and yaw axes at a trunk. By using these degrees of freedom which are provided at the trunk, the robot can smoothly get up from any fallen-down posture. In addition, by reducing the required torque and load on movable portions other than the trunk, and by spreading/averaging out the load between each of the movable portions, concentration of a load on a particular member is prevented from occurring. As a result, the robot is operated more reliably, and energy is used with greater efficiency during a getting-up operation. Therefore, it is possible for the robot to independently, reliably, and smoothly get up from various fallen-down postures such as a lying-on-the-face posture, a lying-on-the-back posture, and a lying sideways posture.

Growing community of inventors

Chiba, Japan

Yuichi Hattori