Abstract: An example method includes identifying an operating state at which a velocity of a hydraulic actuator configured to operate a movable member of a robot is less than a threshold velocity and an actuator force is less than a threshold force, determining a valve command that corresponds to the operating state, such that the valve command is provided to a valve configured to control flow to and from the hydraulic actuator, and the valve includes a spool movable within a body of the valve, and the valve command causes the spool to move within the body of the valve to a position that induces the operating state, and determining a null bias signal based on the valve command.

Abstract: An example method may include determining a requested yaw for a body of a robot, where the biped robot comprises a foot coupled to the body via a leg. The robot may then detect, via one or more sensors, a yaw rotation of the body with respect to a ground surface, where the foot is in contact with the ground surface. Based on the detected yaw rotation of the body, the robot may determine a measured yaw for the body. The robot may also determine a target yaw for the body, where the target yaw for the body is between the measured yaw for the body and the requested yaw for the body. The robot may then cause the foot to rotate the body to the target yaw for the body.

Abstract: An example method includes identifying an operating state at which a velocity of a hydraulic actuator configured to operate a movable member of a robot is less than a threshold velocity and an actuator force is less than a threshold force, determining a valve command that corresponds to the operating state, such that the valve command is provided to a valve configured to control flow to and from the hydraulic actuator, and the valve includes a spool movable within a body of the valve, and the valve command causes the spool to move within the body of the valve to a position that induces the operating state, and determining a null bias signal based on the valve command.

Abstract: Examples for implementing bound and gallop gaits are described herein. A computing system may receive an input for a robotic device to perform a gallop gait or a bound gait. Responsive to receiving the input, the computing system may determine a state of the robotic device based on sensor data monitoring the robotic legs. A sagittal controller of the robotic device may determine vertical impulses and target locations for controlling the legs during the gallop gait based on a pitch, a height, and a velocity of the robotic device. One or more continuous controllers may determine adjustments for controlling the legs based on a roll, a yaw, and/or lateral motions of the robotic device that may result from the robotic device traveling at the velocity and direction as specified in the input. Further, to perform the gait, the controllers may provide instructions to control the legs.