Design approaches to exoskeletal robots traditionally aimed to achieve mechanical forces many times larger than the level achievable by the corresponding natural musculoskeletal system. this has often obstructed the u...
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ISBN:
(纸本)9781479905492
Design approaches to exoskeletal robots traditionally aimed to achieve mechanical forces many times larger than the level achievable by the corresponding natural musculoskeletal system. this has often obstructed the user's muscles during physical rehabilitation. Moreover, mechanisms designed for excessive force generation are heavy and rigid structures with little compliance and thus are not suitable for many mobile applications. Here, we present a novel biomimetic flexible solenoid-coil artificial muscle (FSAM) fibre with inherent mechanical compliance, a high pulling stroke, and structural flexibility that suit a lightweight wearable exoskeletal robot for rehabilitation use. FSAM consists of a chain of specially designed bobbins of solenoid coils that can slide against each other. the chain allows FSAM to form an arch shape when the coils are energized;this is reminiscent of a natural muscle that bends a joint by a combined contraction of the muscle length and bending in an arch shape. this strategy of bending a joint not only reduces the need for linear contraction but also allows the exoskeletal to be compliant withthe contraction morphology of natural muscle.
the paper deals with providing ancillary services using thermostatically controlled loads, in particular electrical space heaters. Ancillary services, such as the secondary control, are aimed to maintain balance betwe...
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ISBN:
(纸本)9781509040704
the paper deals with providing ancillary services using thermostatically controlled loads, in particular electrical space heaters. Ancillary services, such as the secondary control, are aimed to maintain balance between production and consumption of the electricity. Developing concept of smart grids provides possibility to involve classical and advanced control methods for ancillary service provision. the aggregate consumption produced by thermostatically controlled loads is significant due to relatively big number of devices of this kind. the obtained results show that a large population of electrical space heaters can meet the requirements on the secondary control. the population model is based on the first order approximation of the equivalent thermal parameter model. the matrix form of the modal method is used for control system design. Since the modal method assumes using linear model, calculations of the controller parameter are based on a 1D bin state transition model, which is used for approximation of the population behavior. the main feature of the designed control system is that the temperature control and demand tracking are provided by the central controller simultaneously, whereas the standard approaches assumes the temperature to be controlled by the local thermostats.
One of the major driving forces behind technology development is the establishment of equality among everyone. It is intended that the strategic use of technology complements competencies or diminished capacities, imp...
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ISBN:
(纸本)9781479952007
One of the major driving forces behind technology development is the establishment of equality among everyone. It is intended that the strategic use of technology complements competencies or diminished capacities, improving self confidence and autonomy. Blind and partially sighted people often deal withthis inequality in the performance of tasks or daily activities. the presented work reviews some of the proposed technologies to assist visually impaired people in common activities, specifically navigation and going shopping.
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