نتایج جستجو برای: geometric configuration

تعداد نتایج: 214099  

2006
Yong Chen Daniel J. Epstein

This paper presents a mesh-based geometric modeling method to create tessellated models of general structures, which can be the design results of conformal truss structure design, thermal design, topology design, material design, compliant mechanism design and others. A general structure configuration design format is proposed to describe the structures. A universal structure generating system ...

2004
Dmytro Chibisov Ernst W. Mayr Sergey Pankratov

In this paper, we propose a symbolic-numerical algorithm for collision-free placement and motion of an object avoiding collisions with obstacles. The algorithm is based on the combination of configuration space and energy approaches. According to the configuration space approach, the position and orientation of the geometric object to be moved or placed is represented as an individual point in ...

ژورنال: مواد پرانرژی 2019

This paper focuses on the design and analysis of an injector suitable for a liquid injection thrust vector control (LITVC) system. The LITVC system is used in flight systems to control and divert the thrust vector using the secondary fluid spraying method. For this purpose, various types of injectors were studied and categorized based on the geometry and operating conditions. The centrifugal si...

2005
Gaurav Aggarwal Ashok Veeraraghavan Rama Chellappa

This paper presents a method to recover the 3D configuration of a face in each frame of a video. The 3D configuration consists of the three translational parameters and the three orientation parameters which correspond to the yaw, pitch and roll of the face. Such information is important for applications like face modeling, recognition, expression analysis, etc. which require head stabilization...

1994
José Najera Fernando De la Rosa Christian Laugier

This paper presents an approach to plan robust motion strategies of a robot navigating through an environment composed of polygonal obstacles subject to geometric uncertainty constraints. The contacts of the robot against the obstacles are used to reduce its position and orientation uncertainties and to guide the robot to its goal configuration. We describe a motion planner based on this approa...

Journal: :NHM 2015
Jean-Pierre de la Croix Magnus Egerstedt

A number of different interaction modalities have been proposed for human engagement with networked systems. In this paper, we establish formal guarantees for whether or not a given such human-swarm interaction (HSI) strategy is appropriate for achieving particular multi-robot tasks, such as guiding a swarm of robots into a particular geometric configuration. In doing so, we define what it mean...

Journal: :IEEE Trans. Robotics and Automation 1999
Marilena Vendittelli Jean-Paul Laumond Carole Nissoux

This paper shows how to compute the nonholonomic distance between a point-wise car-like robot and polygonal obstacles. Geometric constructions to compute the shortest paths from a configuration (given orientation and position in the plane of the robot) to a position (i.e., a configuration with unspecified final orientation) are first presented. The geometric structure of the reachable set (set ...

2005
Gokul Varadhan Dinesh Manocha

GOKUL VARADHAN: Accurate Sampling-Based Algorithms for Surface Extraction and Motion Planning. (Under the direction of Dinesh Manocha.) Boolean operations, Minkowski sum evaluation, configuration space computation, and motion planning are fundamental problems in solid modeling and robotics. Their applications include computer-aided design, numerically-controlled machining, tolerance verificatio...

Journal: :SIAM J. Control and Optimization 2012
Ge Chen Zhixin Liu Lei Guo

This paper investigates the synchronization behavior of a class of flocks modeled by the nearest neighbor rules. While connectivity of the associated dynamical neighbor graphs is crucial for synchronization, it is well known that the verification of such dynamical connectivity is the core of theoretical analysis. Ideally, conditions used for synchronization should be imposed on the model parame...

2009
Hassen Drira Boulbaba Ben Amor Mohamed Daoudi Anuj Srivastava

The main goal of this paper is to illustrate a geometric analysis of 3D facial shapes in presence of varying facial expressions using the nose region. This approach consists of the following two main steps: (i) Each nasal surface is automatically denoised and preprocessed to result in an indexed collection of nasal curves. During this step one detects the tip of the nose and defines a surface d...

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