It was discovered that there were ergonomics risk factors towards machinists during manual handling of large work pieces may affect the health based on initial assessment conducted CNC turning machine shop in oil and gas manufacturing company. The study aims to determine improve factor be exposed to. In this study, data collected analyzed using Cornell Musculoskeletal Questionnaire, Rapid Entir...

In this study, we investigated dynamic control strategies for over-constrained cable-driven robots. order to a robot, it is essential address issues that arise from the restriction of cable tension, as well redundancy an system. contrast previous research required consideration relationship between tension constraints and computed wrench in distribution problems, developed function incorporates...

Deep reinforcement learning produces robust locomotion policies for legged robots over challenging terrains. To date, few studies have leveraged model-based methods to combine these skills with the precise control of manipulators. Here, we incorporate external dynamics plans into learning-based mobile manipulation. We train base policy by applying a random wrench sequence on robot in simulation...

In this paper, a target approachable force-guided control with adaptive accommodation for the complex assembly is presented. The complex assembly (CA) is defined as a task which deals with complex shaped parts including concavity or whose environment is so complex that unexpected contacts occur frequently during insertion. CA tasks are encountered frequently in the field of the manufacturing au...

Often it is useful to account for small error or variation in a physical simulation. We develop conservative bounds for the unit wrenches applied by pushing on a curved surface patch in two dimensions. We discuss subdividing the surface patch to obtain tighter bounds, and incorporating varying force directions caused by frictional contacts.

Motion paths of cable-driven hexapods must carefully be planned to ensure that the lengths and tensions of all cables remain within acceptable limits, for a given wrench applied to the platform. The cables cannot go slack –to keep the control of the platform– nor excessively tight –to prevent cable breakage– even in the presence of bounded perturbations of the wrench. This paper proposes a path...

UNLABELLED This study examined the effects of glovebox gloves for 11 females on maximum grip and key pinch strength and on contact forces generated from simulated tasks of a roller, a pair of tweezers and a crescent wrench. The independent variables were gloves fabricated of butyl, CSM/hypalon and neoprene materials; two glove thicknesses; and layers of gloves worn including single, double and ...

Magnetically levitated planar actuators are developed as alternatives to xy-drives constructed of stacked linear motors. Although the translator of these ironless planar actuators can move over relatively large distances in the xy-plane only, it has to be controlled in six degrees-of-freedom (DOF) because of the active magnetic bearing. The advantage of magnetically levitated planar actuators i...

The aims of this study were to review five different explantation techniques for the removal of failing implants and to propose a practical clinical protocol. During a 10-year period, 95 implants were explanted from 81 patients. Explantation techniques used were the bur-forceps (BF), neo bur-elevator-forceps (ηBEF), trephine drill (TD), high torque wrench (HTW), and scalpel-forceps (SF) techniq...