Abstract:
Method for selecting an attack pose, when loading piled materials, for a working machine having a bucket, said method including the steps of: - acquiring three dimensional pile data; - generating a set of attack poses; - generating a bucket trajectory through said pile for each attack pose; characterized by - for each attack pose in said set of attack poses, calculating a measure of a convexity of the pile surface for an area of the pile surface delimited by a bucket width and a vertical projection of the bucket trajectory; and - selecting an attack pose based on said measure of convexity.
Abstract:
A machine (10) such as a wheel loader (10) includes a frame (16) and ground engaging propulsion elements (14) coupled with the frame (16). A hydraulically actuated implement system (12) of the machine (10) includes a linkage (34) and an implement (36) and is adjustable from a starting configuration to a second configuration according to a substrate collision avoiding pattern. In the second configuration, the implement (36) hovers above a substrate beneath the machine (10). Related methodology and control logic is also disclosed.
Abstract:
A coordinated joint control system for controlling a coordinated joint motion system, e.g. an articulated arm of a hydraulic excavator blends automation of routine tasks with rela-time human supervisory trajectory correction and selection. One embodiment employs a differential control architecture utilizing an inverse Jacobian. Modelling of the desired trajectory of the end effector in system space can be avoided. The invention includes image generation and matching systems. (Fig. 6, 100, 144, 162, 152)
Abstract:
A coordinated joint control system for controlling a coordinated joint motion system, e.g. an articulated arm of a hydraulic excavator blends automation of routine tasks with rela-time human supervisory trajectory correction and selection. One embodiment employs a differential control architecture utilizing an inverse Jacobian. Modelling of the desired trajectory of the end effector in system space can be avoided. The invention includes image generation and matching systems. (Fig. 6, 100, 144, 162, 152)
Abstract:
A machine (10) includes a frame (12) having ground engaging propulsion elements (24) coupled therewith, and a hydraulically actuated implement system (26) having a linkage (28), an implement (30) coupled with the linkage (28), and a hydraulic actuator (32) coupled with the linkage (28). The machine (10) further includes a control system (40) having an electronic control unit (42) configured to receive an implement down force control command, and responsively adjust a pressure of hydraulic fluid in the hydraulic actuator (32) such that the implement (30) rests with controlled down force upon a substrate below the machine (10). The controlled down force may be less than a quiescent down force of the hydraulically actuated implement system (26). Related methodology is also disclosed.
Abstract:
An excavator comprises a chassis, an implement, and an assembly comprising a boom, a stick, and a coupling. The assembly is configured to define a heading Formula (I) and to swing with, or relative to, the chassis about a swing axis S. The stick is configured to curl relative to the boom about a curl axis C. The implement is coupled to a stick terminal point G via the coupling and is configured to rotate about a rotary axis R such that a leading edge of the implement defines a heading Formula (II). An excavator control architecture comprises sensors and machine readable instructions to generate signals representative of Formula (I), an assembly swing rate ω S about S, and a stick curl rate ω C about C, generate a signal representing a terminal point heading Formula (III) based on Formula (I), ω S and ω C , and rotate the implement about R such that Formula (II) approximates Formula (III).