EP4619199A1 - Verfahren und system zum steuern eines roboters - Google Patents
Verfahren und system zum steuern eines robotersInfo
- Publication number
- EP4619199A1 EP4619199A1 EP23772480.2A EP23772480A EP4619199A1 EP 4619199 A1 EP4619199 A1 EP 4619199A1 EP 23772480 A EP23772480 A EP 23772480A EP 4619199 A1 EP4619199 A1 EP 4619199A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- robot
- hand guide
- path
- operating mode
- guide path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1674—Program controls characterised by safety, monitoring, diagnostic
- B25J9/1676—Avoiding collision or forbidden zones
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/40—Robotics, robotics mapping to robotics vision
- G05B2219/40201—Detect contact, collision with human
Definitions
- the present invention relates to a method and system for controlling a robot and to a computer program or computer program product for carrying out a method described here.
- Moving robots can collide with obstacles.
- the object of the present invention is to improve the operation of a robot. This object is achieved by a method with the features of claim 1.
- Claims 11, 12 protect a system or computer program or computer program product for carrying out a method described here.
- the subclaims relate to advantageous further developments.
- a method for controlling a robot comprises the steps of: - moving the robot, in particular by (operating or controlling) its drive(s); - detecting a collision of the robot, in particular during this movement; and - executing an emergency operating mode of the robot, in particular switching to an emergency operating mode, as a result of the detected collision; wherein in the emergency operating mode the robot, in particular its drives, is or are controlled in such a way that a) the robot can be moved or guided by hand (manually) by a manual guide force exerted manually on the robot; and b) is thereby virtually tied to a manual guide path in terms of control technology, which has or contains a path completely or partially traveled by the robot up to the detected collision, in a further development i) the path already or completely traveled up to the detected collision; or 118970P524 2/19 Kuka Kunststoff GmbH 2022P00028 DE ii) is composed of a path section of a planned (and thus only partially traveled) path that has already been traveled up
- the reference in one embodiment in the emergency operating mode, can be moved by a manual hand-guide force exerted on the robot and is thereby virtually tied to a hand guide path (the reference) in terms of control technology, which has a path (the reference) that the robot has completely or partially traveled up to the detected collision.
- the at least partially traveled path and/or the hand guide path is or is determined in one embodiment - on the basis of target poses specified in advance or before the robot is moved or - on the basis of operator inputs during the movement of the robot, in a further embodiment by a path planner, in particular a path interpolator, and/or before or during the movement.
- the robot or the reference is moved automatically before the collision on the basis of, in particular along, a or the specified path and/or in a direction of travel, thereby at least partially traveling this path, and automated further movement and/or further movement in the direction of travel is stopped as a result of the detected collision.
- 118970P524 3/19 Kuka Kunststoff GmbH 2022P00028 DE In one embodiment, the at least partially traveled path and/or the manual guide path is or will be saved, in a further development before the robot is traveled, in another development during or after the robot is traveled.
- the method comprises the steps of: - moving the robot, in particular by (operating or controlling) its drive(s), - to travel a specified target path in a direction of travel, in particular with the reference, or - based on operator inputs while the robot is moving; - detecting a collision of the robot; - if necessary, stopping further movement in the direction of travel as a result of the detected collision; and - executing an emergency operating mode of the robot as a result of the detected collision; wherein in the emergency operating mode the robot is controlled in such a way that it can be moved by a manual hand-guiding force exerted on the robot and the robot, in one embodiment the reference, is virtually tied in terms of control technology to - the target path or - the section of the path traveled by the robot or the reference up to the detected collision or - the path actually followed by the robot or the reference up to the detected collision, wherein in one embodiment the robot or the reference can (also) be moved again in the direction of travel in the emergency operating mode after the further movement
- the robot can be made movable by a manual hand-guiding force exerted on the robot in a manner known per se, in particular on the basis of control-technical gravity compensation and/or in such a way that the robot remains in its position in the absence of external forces exerted on it or on a payload guided by the robot, in particular a known one.
- an operator can advantageously determine in particular the distance and/or the speed of the (hand-guided, bound) retraction movement.
- the robot in a further development the reference, is virtually bound to the hand guide path in the emergency operating mode by means of an admittance control.
- a hand guide force exerted manually on the robot is determined, in a further development using force sensors and/or on the basis of joint and/or drive forces, and transformed into a target movement of the robot, in a further development the reference, whereby components of the hand guide force that seek to cause a deviation from the hand guide path or components of the target movement that deviate from the hand guide path are reduced, preferably hidden or set to zero.
- the robot in a further development the reference, is virtually tied to the hand guide path in the emergency operating mode using the Operational Space Control Framework.
- the virtual binding can thus be implemented in a particularly simple, variable and/or precise manner.
- the virtual resistance for a first distance of the robot, in a further development the reference, to the hand guide path is greater than for a smaller second distance; in one embodiment, the virtual resistance increases with a distance of the robot, in a further development the reference, to the hand guide path.
- the robot in a further development the reference, is virtually tied to the hand guide path in the emergency operating mode in such a way that the reference, which is in a current pose on the hand guide path, is pulled to a target pose (the reference) on the hand guide path that is closest to this current pose.
- the robot in a further development the reference, is in the emergency operating mode virtually tied to the hand guide path in terms of control technology in such a way that the reference, which is in a current pose on the hand guide path, is not drawn to a target pose (of the reference) on the hand guide path that is closest to this current pose, in one embodiment the robot, in a further development the reference, is in the emergency operating mode (instead) virtually tied to the hand guide path in terms of control technology in such a way that the reference, which is in a current pose on the hand guide path, can be moved freely in the direction of a path tangent in the target pose (of the reference) closest to the current pose by the hand guide force.
- the path tangent can in particular 118970P524 8/19 Kuka Kunststoff GmbH 2022P00028 DE through the target pose closest to the current pose and a target pose adjacent to this on the hand guide path or are determined accordingly.
- a direction through two adjacent target poses is also referred to as a (discretized) path tangent in these target poses in the sense of the present invention.
- a movement of the robot is dampened by control technology in the emergency operating mode; in a further development, a damping force is realized by control technology that counteracts a movement of the robot and/or increases with a speed of the robot. Additionally or alternatively, in one embodiment, a speed of the robot is or will be limited more in the emergency operating mode than when traveling along the path traveled up to the collision. This can increase safety in one embodiment.
- a system for controlling a robot in particular hardware and/or software, in one embodiment programmatically, is set up to carry out a method described here and/or has means for executing an emergency operating mode of the robot as a result of a detected collision, wherein the system or its means controls the robot in the emergency operating mode in such a way that it can be moved by a manual hand-guiding force exerted on the robot and is thereby virtually tied to a hand-guiding path in terms of control technology, which has a path at least partially traveled by the robot up to the detected collision, or the system or its means is set up for this purpose.
- the system or its means has: - means for moving the robot, in particular drives of the robot and/or means for controlling the drives of the robot; and/or 118970P524 9/19 Kuka Kunststoff GmbH 2022P00028 DE - means for detecting a collision of the robot, in particular sensors and/or means for processing sensor signals or collision detection information based thereon; and/or - (means for executing (the emergency operating mode by means of)) an impedance control or admittance control for virtually binding the robot to the hand guide track; and/or - means for the control-technically virtual binding of the robot to the hand guide path in the emergency operating mode in such a way that a hand guide force of 1 N and/or a hand guide force of 10 N and/or a hand guide force of 200 N cannot cause the robot to deviate from the hand guide path or in such a way that a hand guide force of 1 N and/or a hand guide force of 10 N and/or a hand guide force of 200 N can cause the robot to deviate
- a system and/or a means in the sense of the present invention can be designed in hardware and/or software, in particular at least one data- or data-transmitting device, preferably with a memory and/or bus system.
- 118970P524 10/19 Kuka Kunststoff GmbH 2022P00028 DE signal-connected, in particular digital, processing, in particular microprocessor unit (CPU), graphics card (GPU) or the like, and/or one or more programs or program modules.
- the processing unit can be designed to process commands that are implemented as a program stored in a memory system, to detect input signals from a data bus and/or to output output signals to a data bus.
- a memory system can have one or more, in particular different, storage media, in particular optical, magnetic, solid-state and/or other non-volatile media.
- a computer program product can have, in particular be, a storage medium, in particular a computer-readable and/or non-volatile one, for storing a program or instructions or with a program or instructions stored thereon.
- execution of this program or these instructions by a system or a controller causes the system or the controller, in particular the computer or computers, to carry out a method described here or one or more of its steps, or the program or the instructions are set up for this purpose.
- one or more, in particular all, steps of the method are fully or partially computer-implemented or one or more, in particular all, steps of the method are carried out fully or partially automatically, in particular by the system or its means.
- the system has the robot.
- Fig.1 shows a system for controlling a robot according to an embodiment of the present invention
- Fig.2 a method for controlling the robot according to an embodiment of the present invention
- a predetermined target path of the robot 1 or its reference E is indicated by x k ,..., x k+3 .
- x k+2 is the target pose closest to the current pose x E and t indicates a path tangent to this target pose x E ,d closest to the current pose x E.
- the hand guide path is the specified target path.
- the target pose x E ,d on the path which is closest to the current pose x E of the reference E on the path can be found as the target pose x i for which a norm
- becomes minimal, in Fig.1: x E,d x i ⁇ x 1 ,..., x k-2 , x k-1 , x k , x k+1 ,..., x n ⁇ with
- minimal
- the reference E in the current pose on the path is pulled by a virtual spring to the target pose on the path closest to this current pose (see in particular the term K p ⁇ (x E,d - x E )).
- this other target pose forms the new target pose closest to the current pose, to which the reference is then virtually tied for control purposes.
- the spring "snaps" to the target pose closest to the current pose.
- the reference E located in the current pose x E on the path is not pulled to the target pose xE,d on the path closest to the current pose as in the variant first explained with reference to equation (2), but is freely movable in the direction of the path tangent t in the target pose xE,d closest to the current pose by the hand guiding force, since the corresponding constraint (component) is hidden.
- a method shown in Fig.2 for controlling the robot 2 by the robot controller 1 in a first step S10 the robot travels the specified target path and is monitored for collisions.
- step S20: "Y” If a collision is detected during departure (step S20: "Y”), the system switches to an emergency operating mode and in the emergency operating mode the robot is controlled in the manner explained above in such a way that it can be moved by a manual hand-guide force exerted on the robot and is virtually tied to a manual guide path in terms of control technology, which has a path that the robot has at least partially traveled up to the detected collision (Fig. 2: step S30). Otherwise (step S20: “N”) the robot continues to travel along the specified target path. In contrast to an automated retraction movement, the operator can determine how far and quickly the robot, which is tied to the at least partially traveled path, moves back by appropriately dosing the hand-guide force and, if necessary, move it further or again in the previous direction of travel.
- exemplary embodiments were explained in the previous description, it should be noted that a large number of variations are possible. 118970P524 14/19 Kuka Kunststoff GmbH 2022P00028 DE
- a predetermined target path was used as the hand guide path.
- An actual (executed) path can also be used, which can improve reliability and enable use when moving the robot on the basis of operator inputs during movement.
- the use of a target path specified on the basis of previously specified target poses can be computationally advantageous and/or compensate for unwanted deviations from the target path before the collision.
- the exemplary embodiments are merely examples that are not intended to limit the scope of protection, applications and structure in any way.
Landscapes
- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022212325.5A DE102022212325A1 (de) | 2022-11-18 | 2022-11-18 | Verfahren und System zum Steuern eines Roboters |
| PCT/EP2023/075583 WO2024104639A1 (de) | 2022-11-18 | 2023-09-18 | Verfahren und system zum steuern eines roboters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4619199A1 true EP4619199A1 (de) | 2025-09-24 |
Family
ID=88093784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23772480.2A Pending EP4619199A1 (de) | 2022-11-18 | 2023-09-18 | Verfahren und system zum steuern eines roboters |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4619199A1 (de) |
| CN (1) | CN120225321A (de) |
| DE (1) | DE102022212325A1 (de) |
| WO (1) | WO2024104639A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024123615A1 (de) * | 2024-08-19 | 2026-02-19 | Kuka Deutschland Gmbh | Steuern eines Roboters |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160214261A1 (en) * | 2015-01-22 | 2016-07-28 | GM Global Technology Operations LLC | Collaborative robot system and method |
| DE202016100505U1 (de) * | 2016-02-02 | 2017-05-04 | Kuka Systems Gmbh | Sicherheitseinrichtung |
| DE102019118897B3 (de) * | 2019-07-12 | 2020-10-29 | Franka Emika Gmbh | Kollisionsdetektion für einen Robotermanipulator |
| DE102019128591B4 (de) * | 2019-10-23 | 2022-03-10 | Franka Emika Gmbh | Gestensteuerung für einen Robotermanipulator |
| DE112020006647B4 (de) * | 2020-01-30 | 2024-05-23 | Mitsubishi Electric Corporation | Ursprungsrückführvorrichtung |
| DE102020103857B4 (de) * | 2020-02-14 | 2023-03-02 | Franka Emika Gmbh | Kraftbegrenzung bei Kollision eines Robotermanipulators |
| CN115996822B (zh) * | 2020-08-13 | 2024-01-09 | Abb瑞士股份有限公司 | 控制工业致动器的方法、控制系统和工业致动器系统 |
| DE102020212696A1 (de) * | 2020-10-08 | 2022-04-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Handhabungsvorrichtung mit adaptivem Kollisionsschutzsystem |
-
2022
- 2022-11-18 DE DE102022212325.5A patent/DE102022212325A1/de active Pending
-
2023
- 2023-09-18 WO PCT/EP2023/075583 patent/WO2024104639A1/de not_active Ceased
- 2023-09-18 CN CN202380080019.9A patent/CN120225321A/zh active Pending
- 2023-09-18 EP EP23772480.2A patent/EP4619199A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024104639A1 (de) | 2024-05-23 |
| CN120225321A (zh) | 2025-06-27 |
| DE102022212325A1 (de) | 2024-05-23 |
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