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A power assist system reduces the weight of an object lifted with it. But, the human operator cannot differentiate between the perceived weight and the actual weight and eventually applies excessive load force. This faulty force programming (excessive load force) results in faulty motions of the power assist system and jeopardizes its maneuverability, ease of use, naturalness, human-friendliness,...
This paper deals with the design of a 1DOF power assist robot for lifting objects. Human's vertical lifting force, comprises of inertial force and gravitational force, was considered as the desired dynamics of the robot system. We hypothesized that human's perception of object weight due to inertial force might be different from the perceived weight due to gravitational force for lifting object with...
In this paper, we designed a 1DOF power assist system for lifting objects. Human's vertical lifting force, comprises of inertial force and gravitational force, was considered as the desired dynamics of the system. We hypothesized that human's perception of object weight due to inertial force might be different from the perceived weight due to gravitational force for lifting object with the power assist...
An object lifted with a power assist robot is always perceived lighter than its actual weight. But, the human operator cannot differentiate between the power assisted weight and the actual weight and eventually applies load force (vertical lifting force) according to the actual weight of the object. This faulty force programming (excessive load force) gives faulty motions to the power assist robot...
In this paper, we designed a simple 1 DOF power assist system for lifting objects based on human's perception of object weight. We hypothesized that, human's perception of weight due to inertial force might be different from the perceived weight due to gravitational force. We then compared human's load force rates for lifting objects manually with that for lifting objects with the power assist system...
In this paper, we designed a 1 DOF power assist system for lifting objects based on human operator's perception of object weight. We established psychophysical relationships between the actual weights and the power assisted weights of objects lifted with the power assist system. We also determined the excess of the load forces that humans applied while lifting objects with the system. The psychophysical...
This paper attempts to design a power assist system for maneuvering heavy objects in industries based on human operator's perception of object weight. The perceived weight of an object maneuvered with a power assist system is always very much less than the actual weight of the object. But, the human operator cannot differentiate between the perceived weight and the actual weight and eventually applies...
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