1,721,105 research outputs found
[Sermones de timore divinorum iudiciorum]
No full text[Robertus Caracciolus] ; angehängtImpressum nach v.d.Haegen 1998 1,10Titel nach GW etc
[Sermones de adventu]
No full text[Robertus de Liteo]; [Anhang:] [Dominici Bollani ... in questione de concepcione gloriosissime virginis Marie Prohemium
DESIGN AND CALIBRATION OF AN OPTO-MECHANICAL APPLIANCE FOR 3D NON-CONTACT ORTHOPEDIC MEASUREMENTS - PART I: MATHEMATICAL MODEL AND LABORATORY PROTOTYPE
No full textAn opto-mechanical system performing fast and accurate non-contact foot measurements is proposed. By processing the measured data it is possible to get three-dimensional foot models and to design custom-made shoes. This work is subdivided into two parts: in Part I, after introducing the system operating method and describing the vision technology employed, a mathematical model of the system is developed accounting for the main internal parameters of the camera. In order to reduce scanning time and the time necessary to create the 3D foot model, the measured data have been arranged in a particular structure and a suitable acquisition procedure has been developed. A laboratory prototype has been built to test the performances of the system: a detailed analysis of its geometry and of its components is provided as well as a concise description of the simple user interface developed to run and control the system
Sermones de laudibus sanctorum.
Full text linkCopia digital : Biblioteca Digital Hispánica (Biblioteca Nacional de España
Optimal design of ball-screw driven servomechanisms through an integrated mechatronic approach
No full textThis paper proposes a novel model-based mechatronic approach for the design of ball-screw driven servomechanisms. The proposed technique is aimed at selecting the optimal combination of electric motor and ball-screw which minimizes the motor torque, while ensuring the achievement of the prescribed dynamic performances of the closed loop system. Such performances, as well as feasibility constraints related to the component characteristics, are translated in the method as bounds in the lead – diameter space. In particular, feasible torque and speed are the constraints posed by the motor; screw critical speed, ball critical speed, service life, buckling load are those due to the ball-screw, while the controlled system performances are included through the inertia ratio and the bandwidth requirements. To this purpose, the ball-screw non-ideal characteristics are represented through models with different complexity and are accounted for in the design. A straightforward graphical approach is formulated to trade off between the many conflicting requirements and to prevent both overly conservative and undersized design, while ensuring problem solvability
DESIGN AND CALIBRATION OF AN OPTO-MECHANICAL APPLIANCE FOR 3D NON-CONTACT ORTHOPEDIC MEASUREMENTS – PART II: CALIBRATION METHODOLOGY AND EXPERIMENTAL RESULTS
No full textA multistep iterative calibration methodology for the opto-mechanical system introduced in Part I is proposed. The methodology makes use of a monoview coplanar set of control points, whose number has been determined on the basis of both geometrical considerations and the results of a statistical analysis aiming at assessing the procedure stability in the case of noisy image data. The calibration procedure is carried out comparing the theoretical and observed images of the calibration pattern. Both synthetic and real data have been employed to test the calibration procedure, which proved to be accurate and efficient. The experimental results achieved by the calibrated system are satisfactory in terms of measurement precision
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