A computing system and method for estimating friction and/or center of mass (CoM) are presented. The system may perform the method by selecting at least one of: (i) a first joint from among a plurality of joints, or (ii) a first arm segment from among a plurality of arm segments. The computing system further outputs a set of one or more movement commands for causing robot arm movement that includes relative movement between the first arm segment and a second arm segment via the first joint, and receiving a set of actuation data and a set of movement data associated with the first joint or the first arm segment. The computing system further determines, based on the set of actuation data and the set of movement data, at least one of: (i) a friction parameter estimate or (ii) a CoM estimate.

In a method for compensating for friction of a multi-degree-of-freedom cooperative robot including a plurality of joints, the method for compensating for friction of the multi-degree-of-freedom cooperative robot, according to an embodiment of the present invention, comprises the steps of: generating a motion of a cooperative robot for friction compensation; driving the plurality of joints on the basis of the generated motion of the cooperative robot; receiving friction identification data from the cooperative robot; and calculating a friction model function from the received friction identification data.

Compensating unit for an automation system, in particular for arranging between a handling apparatus and a tool, having a main part and having a fastening part, wherein the fastening part is arranged such that it can be moved in relation to the main part along at least one compensating direction from a basic position into a compensating position, and having spring means for returning the fastening part from the compensating position into the basic position, characterized in that drive means are provided within the compensating unit for the purpose of adjusting the basic position of the fastening part along the at least one compensating direction.

The invention relates to a robot controller controlling a robot arm, the robot controller is configured to maintain the robot arm in a static posture when only gravity is acting on the robot arm and allow change in posture of the robot arm 5 when an external force different from gravity is applied to the robot arm. The free-drive mode of operation is activatable by a user establishing a free-drive activation signal to the robot controller, which in free-drive mode of operation is configured within at a free-drive safety period to allow a part of said robot arm to be moved within a virtual three-dimensional geometric shape 10 surrounding the part of the robot arm.

A method and robot controller configured to obtain an inertia-vibration model of the robot arm. The inertia-vibration model defines a relationship between the inertia of the robot arm and the vibrational properties of said robot arm and have been by setting the robot arm in a plurality of different physical configurations and for each of said physical configurations of said robot arm obtaining the vibrational properties and the inertia the robot arm. The inertia-vibration model makes it possible to in a simple and efficient way to obtain the vibrational properties of different physical configurations of the robot arm whereby the robot arm can be controlled according to the vibrational properties of the robot arm. This makes it possible to reduce the vibrations of the robot arm during movement of the robot arm.

Provided is a control system that can control the operation of a robot with high accuracy. A control system 1 is provided with a sensor 44 that detects an acceleration that is based on the vibration of a robot 3, an interpolation unit 222 that interpolates a plurality of pieces of sensor data detected by the sensor 44, and a data generation unit 223 that generates combined data having a short sampling period on the basis of a plurality of pieces of interpolation data obtained through interpolation by the interpolation unit 222.

A robot apparatus is provided on a stand and includes a control apparatus that controls the robot apparatus. The control apparatus calculates vibration generated on the stand based on model data of the stand and trajectory data of an operation of the robot apparatus and corrects the trajectory data based on the vibration.

A robot joint torque control system and a load compensation method therefor are provided, which relate to the technical field of robot joint motion control. A mathematical model of the robot joint torque control system is established first. Equivalent transformation is performed on a system functional block diagram thereof, and then it can be seen that load parameters have a great influence on joint torque output. A load compensation controller is designed to effectively eliminate the influence of the load parameters on an output torque of the joint. The system is equivalent to an inertial element on the basis of the compensation, and then a PD controller parameter is adjusted to increase an open-loop gain of the system, so as to increase a system bandwidth and increase a response speed of the joint torque control system, thereby improving performance of the joint torque control system.

A friction compensation device of the present disclosure includes a drive torque calculation unit that calculates output torque of a transmission mechanism from a motor's position, velocity, and acceleration, the transmission mechanism being connected to a motor via a shaft to transmit the driving force of the motor, and a friction estimate value calculation unit that calculates a friction estimate value that is an estimate value of a friction force on the shaft. The friction estimate value calculation unit includes a friction correction value calculation unit that calculates a friction correction value to correct the friction force on the shaft, in accordance with the output of the drive torque calculation unit.

A system includes a machine tool 10, a robot 25 having a camera 31, and a transfer device 35 having the robot 25 mounted thereon, and an identification figure is arranged in a machining area of the machine tool 10.