http://arthra.ugal.ro/handle/20.500.14043/24742 2026-04-16T14:34:00Z http://arthra.ugal.ro/handle/20.500.14043/24757 Algorithms for Objects' Shape Recognition and Measurement Before Gripping Srarețu, Ionel; Itu, Alexandru The paper proposes an algorithmic methodology to solve a necessary first step, namely visualization, recognition and measurement of objects, for gripping, in particular by means of anthropomorphic grippers for robots. For object shape recognition, Haar classifiers, and an Open CV library use are proposed. Based on measurement of the distance between the initial point and a second intermediate point, you can do calculations, aimed at object size, and distance remaining to the target. Thus, the algorithmic method for visualization, recognition, and measurement of objects for anthropomorphic gripping, is based on a number of existing software modules. They have been adapted for the intended purpose, and specially designed software modules were added. The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING, ISSN 1224 - 5615 2011-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/24756 Processsing and Analyzing Object Images With the view of Object Grasping Starețu, Ionel; Itu, Alexandru This paper presents a solution based on image processing techniques used for analyzing images of objects which will be grasped, using existing software technologies completed with specific software modules. Digital image processing, as part of the grasping strategy, is based on a number of Microsoft technologies used to manage the devices attached to a computer, and a series of image processing techniques. The analysis is made directly on the video sequence taken from a video device (web cam). From the video, sequence frames are extracted which are then converted into RGB format and transformed into digital images used for analysis. Based on the existing technologies review, several necessary adjustments are identified to the proposed objective, and several specific software modules which can be conceived are described in details, and are then used to facilitate the implementation. The sequence presented in this paper is a part of an ample process, that aims to optimize the grasping strategy used for anthropomorphic prehensors with fingers from robot equipment. The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING, ISSN 1224 - 5615 2011-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/24758 Seismic Base Isolation of Structures Using Frictuon Pendulum Bearings Șcheaua, Fănel Base isolation systems have become a significant element to enhance reliability during an earthquake. One type of base isolation system is Friction Pendulum Bearing in which the superstructure is isolated from the foundation using specially designed concave surfaces and bearings to allow swayunder its own natural period during the seismic events. Friction Pendulum Bearings are seismic isolation systems that have been as a kind of bridge, and building retrofit in numerous cases around the world. To assess their impact on structure performance, models are needed to capture the behavior of these highly nonlinear elements. The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING, ISSN 1224 - 5615 2011-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/24755 Damage Detection at Vibration Passive Isolation Devices Năstac, Silviu; Leopa, Adrian This paper deals with some theoretical aspects combined with experimental tests regarding early damage identification in vibroisolation devices. This study was a natural fall-back of an analysis regarding the behaviour of the passive isolation devices against vibration and seismic waves. On the exploitation time, all technical devices and systems acquire a different wearing out levels because of the dynamic charging. Hereby performance characteristics change and the system starts working improperly. Rubber based on elements is especially discussed. Numerical simulations were developed for simple spatial configurations of isolation devices. A Stochastic approach of essential results was briefly presented together with relevant results and discussions. The Annals of ''Dunarea de Jos'' University of Galati : Fascicle XIV : MECHANICAL ENGINEERING : ISSN 1224 - 5615 2011-01-01T00:00:00Z