the analysis of existing methods for building the 3D surfaces is carried out. It is taken into account the advantages and disadvantages of the described methods. the kinematic model is described in detail. the algorit...
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Appling mathematical modeling methods for analyses synchronization processes of distributed data processing systems makes it possible to significantly optimize these processes and guarantee the required level of consi...
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the shift system of FSAE racing car is an indispensable part of the powertrain of the racing car. A set of stable and responsive shift system is of great help to improve the performance of the racing car. Based on the...
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this work presents a robotic platform for upper-limb rehabilitation robotics. It integrates devices for human multi-sensorial feedback for engaging and immersive therapies. Its modular software design and architecture...
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ISBN:
(纸本)9781424448937
this work presents a robotic platform for upper-limb rehabilitation robotics. It integrates devices for human multi-sensorial feedback for engaging and immersive therapies. Its modular software design and architecture allows the implementation of advanced control algorithms for effective and customized rehabilitations. A flexible communication infrastructure allows straightforward devices integration and system expandability.
the stochastic optimal control problem of an ordinary non-linear discrete stochastic system is considered. the quality of control is estimated by the mathematical expectation of the Boltz type functional to be minimiz...
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Soft robots have drawn significant attention recently for their ability to achieve rich shapes when interacting with complex environments. However, their elasticity and flexibility compared to rigid robots also pose s...
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ISBN:
(纸本)9781665408288
Soft robots have drawn significant attention recently for their ability to achieve rich shapes when interacting with complex environments. However, their elasticity and flexibility compared to rigid robots also pose significant challenges for precise and robust shape control in real-time. Motivated by their potential to operate in highly-constrained environments, as in search-and-rescue operations, this work addresses these challenges of soft-robots by developing a model-based full-shape controller, validated and demonstrated by experiments. A five-actuator planar soft robot was constructed with planar piezoelectric layers bonded to a steel foil substrate, enabling inchworm-like motion. the controller uses a soft-body continuous model for shape planning and control, given target shapes and/or environmental constraints, such as crawling under overhead barriers or "roof" safety lines. An approach to background model calibrations is developed to address deviations of actual robot shape due to material parameter variations and drift. Full experimental shape control and optimal movement under a roof safety line are demonstrated, where the robot maximizes its speed within the overhead constraint. the mean-squared error between the measured and target shapes improves from similar to 0.05 cm(2) without calibration to similar to 0.01 cm(2) with calibration. Simulation-based validation is also performed with various different roof shapes.
the efficient sharing of information is a commonly overlooked problem in methods proposed for cooperative multi-robot tasks. However, in multi-robot scenarios, especially when the communication network's quality o...
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ISBN:
(纸本)9789897580406
the efficient sharing of information is a commonly overlooked problem in methods proposed for cooperative multi-robot tasks. However, in multi-robot scenarios, especially when the communication network's quality of service is less than desirable, either in bandwidth or reliability, efficient information exchange is a key aspect for the successful deployment of coordinated robotic teams with proper exchange of information. Compression is a popular, well-studied solution for transmitting data through constrained communications channels, and many general-purpose solutions are available as free and open-source software (FOSS) projects. there are various benchmarking tools capable of comparing the performance of these techniques, but none that differentiate between them in the compression of the typical data exchanged among robots in a cooperative task. thus, choosing a compression technique to be used in this context is still a challenge. In this paper, the issue of efficiently communicating data among robots is addressed by comparing the performance of various compression techniques in a case study of multi-robot simultaneous localization and mapping (SLAM) scenarios using occupancy grids, a cooperative task usually requiring the exchange of large amounts of data.
In recognition of the ever increasing energy prices, reactive power compensation is getting more and more into the forefront. Climate protection and energy is one of the most discussed issues of current policy. Produc...
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ISBN:
(纸本)9789898565709
In recognition of the ever increasing energy prices, reactive power compensation is getting more and more into the forefront. Climate protection and energy is one of the most discussed issues of current policy. Production of electrical energy from primary sources to its consumption occurs however in the process of losses. Although these total losses are obviously only a small portion of the current-dependent losses in electricity transmission, the final absolute value of those losses go to billions of kilowatt. Part of the current-dependent losses in networks raises inductive reactive power from the operation of common appliances. Many home electric appliances like refrigerators, deep-freezes, washing machines, washers, pumps, etc. produce vaste energy called reactive power, which can be reduced. this technique can lower electricity consumption (from 10 to 30% - different by countries). Current possibilities of devices for reduction of reactive power for home usage are only very limited with high price. Paper deal with a development of miniaturized solution based on 32b MCU (Micro controller Unit) with wireless communication unit and independent powering circuit. We mentioned need of a very fine measurement of an input voltage and current as well as remote monitoring option.
Origami offers the production of various intricate flexible structures through folding processes. controlling and repeating the folding processes in the smaller scale, however, has remained a challenge in engineered m...
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ISBN:
(纸本)9781665408288
Origami offers the production of various intricate flexible structures through folding processes. controlling and repeating the folding processes in the smaller scale, however, has remained a challenge in engineered manufacturing. this paper presents a novel fabrication method for temperature-controlled soft self-folding origami strings which can reconfigure into designated 2D structures. thanks to the reversible volume change of the material, the folding process can be reversed and used for unfolding the structures. We approached the challenge by laminating two soft materials, one of which is capable of changing its volume when experiencing a temperature change while the other is unaffected, hence resulting in a bending motion. the developed novel fabrication process enabled a firm grafting of the volume changing material, Poly(N-isopropylacrylamide) (pNIPAM), onto the static material, Polyvinyl Chloride (PVC). We demonstrated three self-folding and self-unfolding 1D strings into 2D structures, namely a rectangular coil with 6 hinges, a triangle with 3 hinges, and a square with 4 hinges, all of which can be reversed to their initial state by controlling the temperature. the obtained success rate of the fabrication process reached 95% for a single self-folding hinge, promising about 60% for a string with 10 hinges. the developed origami strings exhibit flexibility depending on the stiffness of the pNIPAM which can be regulated by changing the environmental temperature.
We examine the proposition of a stationary assistive robot arm in the kitchen. Based on a preliminary business plan and withthe aim of generating engineering requirements, a multi-disciplinary project was established...
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