In this paper, we focus on the problem of optimally placing a mixture of static and PTZ cameras based on the resolution requirement, this configuration will be useful later cameras planning. the static cameras used fo...
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ISBN:
(纸本)9789897580390
In this paper, we focus on the problem of optimally placing a mixture of static and PTZ cameras based on the resolution requirement, this configuration will be useful later cameras planning. the static cameras used for detecting an object or an event, this result is used to select the best PTZ camera within the network to identify or recognize this moving object or event. In our work the monitoring area is represented by a grid of points distributed uniformly or randomly (S. thrun, 2002), then using surface-projected monitoring area and camera sensing model we develop a binary integer programming algorithm. the results of the algorithm are applied successfully to a variety of simulated scenarios.
the development of practical motion planning algorithms and obstacle avoidance techniques is considered as one of the most important fields of study in the task of building autonomous or semiautonomous robot systems. ...
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ISBN:
(纸本)9781617387197
the development of practical motion planning algorithms and obstacle avoidance techniques is considered as one of the most important fields of study in the task of building autonomous or semiautonomous robot systems. the motion planners designed for humanoid robots combine both path planning generation and the ability of executing the resulting path with respect to their characteristics. these planners should consider the specific dynamical constraints and stability problems of the humanoid robots. In this paper, we present a time-efficient hybrid motion planning system for a Fujitsu HOAP-2 humanoid robot in indoor and miniature city environments. the proposed technique is a combination of sampling-based planner and D* Lite search to generate dynamic footstep placements in unknown environments. It generates the search space depending on non-uniform sampling of the free configuration space to direct the computational resources to troubled and difficult regions. D* Lite search is then implemented to find dynamic and low-cost footstep placements within the resulting configuration space. the proposed hybrid algorithm reduces the searching time and produces a smoother path for the humanoid robot with low cost.
Robotic systems are used within a great variety of medical disciplines. A handheld robot promises a number of advantages compared to conventional (medical) robots but this approach leads to strict specifications regar...
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ISBN:
(纸本)9789898111319
Robotic systems are used within a great variety of medical disciplines. A handheld robot promises a number of advantages compared to conventional (medical) robots but this approach leads to strict specifications regarding size, weight and dynamic properties. A new hybrid kinematics - the Epizactor - seems to be advantageous and is compared to two well-known parallel kinematics regarding the ratio of workspace and volume the number of kinematic elements, the cost of computation, the stiffness the effects of clearance, actuation (weight), and accuracy using a well-described industrial method for comparison. It becomes clear that the Epizactor has advantages concerning the ratio of workspace and volume, needs a smaller number of kinematic elements and fewer computations, and has less than half the mass than the parallel kinematics. Its accuracy, stiffness and the effects of clearance are comparable. the advantages of this new kinematic set-up lead to a first deployment within the field of medical robotics.
this article briefly summarizes the theory of chaos and its applications. Firstly, we begin by describing chaos as an aperiodic bounded deterministic motion, which is sensitive to initial states and therefore unpredic...
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this paper presents the automatic setup of the Denavit-Hartenberg notation for open chain robots. A graphical interface and a virtual construction kit using established joint and link symbols are provided. the user co...
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ISBN:
(纸本)9781617387197
this paper presents the automatic setup of the Denavit-Hartenberg notation for open chain robots. A graphical interface and a virtual construction kit using established joint and link symbols are provided. the user combines symbols by pick and place to define the kinematical configuration. A matrix is automatically generated that competely represents the geometric configuration. Related to this matrix the Denavit-Hartenberg notation is automatically determined - a new feature that solves the generic problem for the first time. Since the definitions resulting from the Denavit-Hartenberg convention are not unique, some additional rules and modifications in the sequence of applying the rules are used in order to obtain a unique description. Furthermore it is outlined how the presented solution can be extended to an integrated tool for the prototyping of new or modified robotic structures.
the controller Area Network (CAN) is a message based event triggered communication service, and primarily applied in automotive and various industries such as vehicles, multi-robot, real-time communication systems and...
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ISBN:
(纸本)9781450365635
the controller Area Network (CAN) is a message based event triggered communication service, and primarily applied in automotive and various industries such as vehicles, multi-robot, real-time communication systems and others. the CAN bus connects several independent CAN modules and allows them to communicate and work together asynchronously and/or synchronously. All nodes can simultaneously transmit data to the CAN bus, and the collision of multiple messages on the bus is resolved by a bitwise arbitration algorithm, which operates by assigning a node with low-priority message to switch to a "listening" mode while a node with high-priority message remains in a "transmitting" mode. this arbitration mechanism results in the starvation of lower priority messages. Previous studies resolving the CAN starvation problem have been mostly focused on the arbitration between two nodes, not considering simultaneous transmission of two or more nodes. In this paper, we present a starvation free CAN model that resolves the arbitration of multiple simultaneous transmission of two or more messages.
the manual configuration of today's autonomous systems for new tasks is becoming increasingly difficult due to their complexity. One solution to this problem is to use planning algorithms that can automatically sy...
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ISBN:
(纸本)9789897584428
the manual configuration of today's autonomous systems for new tasks is becoming increasingly difficult due to their complexity. One solution to this problem is to use planning algorithms that can automatically synthesize suitable data processing pipelines for the task at hand and thus simplify the configuration. Planners usually rely on models, which are created manually based on already existing methods. these methods are often provided as part of domain specific code libraries. therefore, using existing planners on new domains requires the manual creation of models based on the methods provided by other libraries. To facilitate this, we propose a system that generates an abstract semantic model from C++ libraries automatically. the necessary information is extracted from the library using a combination of static source code analysis to analyze its header files and natural language processing (NLP) to analyze its official documentation. We evaluate our approach on the perception domain with two popular libraries: HALCON and OpenCV. We also outline how the extracted models can be used to configure data processing pipelines for the perception domain automatically by using an existing planner.
A formal description of the formation and the task of assigning moving objects to the formation is given, the main parameters affecting the quality of the assignment are considered. Assignment quality criteria are det...
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the implementation of a distributed control algorithm for the safe flight of Unmanned Aerial Vehicles (UAVs) in traffic conditions in an embedded processor unit is presented. Details on the implementation are given. T...
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In this paper, nonlinear identification of a Liquid-saturated Steam Heat Exchanger using Wavelet based State Dependent Parameter (WSDP) models is presented. this is a highly nonlinear, non-minimum phase process, and o...
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ISBN:
(纸本)9788993215038
In this paper, nonlinear identification of a Liquid-saturated Steam Heat Exchanger using Wavelet based State Dependent Parameter (WSDP) models is presented. this is a highly nonlinear, non-minimum phase process, and often operated under varying conditions. Here, in order to characterize such dynamics, 2-D WSDP model is used. the simulation results demonstrate the merit of the identified model.
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