In this paper, we introduce our designed robotic nanny called Dorothy Robotubby to play with and take care of a child in case his/her parent or caregiver is absent. there are two main user interfaces in our robotic sy...
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this paper presents a control strategy for improving the performance of hexapod robot walking on uneven terrain using the combination of designed force threshold-based foot motion and center-of-body (CoB) based omni d...
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Most motorcycles in developing countries use carburetor systems as the fuel delivery method especially for models withthe cubic capacity of less than 125cc. However, small gasoline fuelled engines operating using car...
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this paper has introduced electromechanical coupling characteristics to the lower extremity exoskeleton systems. When the load torque compensation model has been established, A model of knee position control system ha...
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this contribution presents a comprehensible model based approach of a control structure to controlthe output force of series elastic actuators. the controller is based on a linear model of the actuator, which can be ...
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this contribution presents a comprehensible model based approach of a control structure to controlthe output force of series elastic actuators. the controller is based on a linear model of the actuator, which can be reduced to a PT 2 element if a disturbance compensator is included. this allows for a straightforward design of a state space controller and an intuitive choice of the controller parameters. An actuator design is presented and the required system parameters are identified. the performance of the control structure is proven by experiment.
A PID sliding mode position controller and an adaptive sliding mode controller are presented for a prosthetic hand. the adaptive controller modulates the PID gains based on the detected stiffness of the grasped object...
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A PID sliding mode position controller and an adaptive sliding mode controller are presented for a prosthetic hand. the adaptive controller modulates the PID gains based on the detected stiffness of the grasped object. the results from benchtop experiments indicate statistically significant improvements such as improved tracking error and reduced steady state error in the system response when using the adaptive controller.
Ontologies, formal knowledge representation, and reasoning are technologies that have begun to gain substantial interest in recent years. We present a high-level declarative approach to writing application programs fo...
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In this paper, an optimal control problem for uncertain bilinear systems is formulated via a guaranteed cost approach and then applied to the design of a stabilizing controller for a robot arm actuated by Pneumatic Ar...
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In this paper, an optimal control problem for uncertain bilinear systems is formulated via a guaranteed cost approach and then applied to the design of a stabilizing controller for a robot arm actuated by Pneumatic Artificial Muscles (PAMs). the results show that the contributed methodology is suitable for efficiently designing control systems which can match the requirements both on safety and on energy efficiency for PAMs-driven robots during human-robot interactions. the performances of the state-feedback control system are evaluated on the basis of some numerical simulations.
From observation of human data, a set of sinusoidal trajectories were developed to mimic the human motion of unscrewing a bottle cap withthe thumb and index finger. these trajectories were then implemented on a dexte...
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From observation of human data, a set of sinusoidal trajectories were developed to mimic the human motion of unscrewing a bottle cap withthe thumb and index finger. these trajectories were then implemented on a dexterous robotic hand in the form of a robustly stable sliding mode control algorithm. Withthe developed synergies, a single myoelectric input was used to control multiple finger joints simultaneously. this controller was then compared to a one degree of freedom prosthetic hand also under sliding mode control. the two hands were used to complete an unscrewing task as quickly as possible. the synergy controller produced a statistically significant reduction in task completion time and also reduced the required workspace.
Prolonged and uncontrolled high shear stresses and turbulence can cause hemolysis, while alternating and low-level stresses may contribute to platelet activation and thrombus formation. Such deficiencies are reported ...
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Prolonged and uncontrolled high shear stresses and turbulence can cause hemolysis, while alternating and low-level stresses may contribute to platelet activation and thrombus formation. Such deficiencies are reported for Total Artificial Heart (TAH) systems which are generally not fully capable of dynamic adaptation to sudden pressure and volume changes. this study introduces an adaptive robust controller for a linear motor based TAH (LMTAH) which overcomes such shortcomings. Proposed controller performance is compared with simulated natural heart in normal and stressed physiological conditions. Application of adaptive robust control results in flows with less stress variation and recirculation, thereby reducing the possibility of blood clot formation and hemolysis.
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