摘要:
An electrodynamic actuator, comprising a cylindrical fixed part, a movable part driven to reciprocate in an axial direction of the fixed part, the movable part being configured such that at least a part of the movable part is accommodated in a hollow part of the fixed part, and a plurality of movable part support mechanisms that support the movable part from a lateral side to enable the movable part to reciprocate in the axial direction of the fixed part, wherein each of the plurality of movable part support mechanisms comprises a rail attached to a side surface of the movable part to extend in the axial direction of the fixed part; and a runner block attached to the fixed part to engage with the rail, and the plurality of movable part support mechanisms are arranged to have approximately constant intervals therebetween around an axis of the fixed part.
摘要:
[Problem] The invention is to provide a test device, in which the weight of the platform that is the moving part is light, and the rigidity is high, and in which a movement steady with a light base can be achieved, and in which the simulation up to a high frequency is possible by small power and little space, and in which it is cheap and compact. [Resolution Approach] The test device of the invention comprising: a platform 18, which is connected on the base plate 14 by a movement connecting mechanism 16, and in which a parts to be driven 30 is provided, and a magnetizing device 40, which is disposed to a lower surface of the base plate 14 to face the slipping floor, and in which magnetizing force to the slipping floor 12 can be changed, wherein, in the operating state at a high air pressure of the air bearing 34, the magnetizing force to the slipping floor 12 of the magnetizing device 40 is a strong state, and in the non-operating state at a low air pressure of the air bearing 34, the magnetizing force to the slipping floor 12 of the magnetizing device 40 is a weak state.
摘要:
Bei einer Vorrichtung zur Belastungsprüfung rotatorischer Prüflinge durch mechanisches Einwirken periodisch oszillierender Kräfte wenigstens eines Schwingssystems, welches einen oder mehrere Aktuatoren (12, 15) zur Erzeugung einer Erregerschwingung umfasst, ist ein Prüfling auf einem Maschinentisch (1) feststehend abgestützt und in Richtung der Drehachse des Prüflings an seinen gegenüberliegenden Enden horizontal gelagert; wenigstens ein Ende des Prüflings ist über mindestens drei gleichmäßig über einen Kreisumfang um die Drehachse des Prüflings angeordnete Koppelstäbe (10) mit einem Aktuator (12) im wesentlichen spielfrei gekoppelt, derart, dass die Koppelstäbe (10) der eingestellten Erregerschwingung entsprechende Kräfte auf den Prüfling zur Verprobung der Umlaufbiegung übertragen.
摘要:
Provided is a measuring apparatus capable of measuring a vibration amount weighted with characteristics of vibration transmission to a human ear and capable of evaluating correctly an electronic device having a vibrator. A measuring apparatus 10 configured to evaluate an electronic device 100 that transmits vibration sound to a human ear by pressing a vibrator 102 held in a housing 101 thereto, including an ear simulator 50 that mimics a human ear, and a vibration detection unit 55 disposed on a periphery 52 of an artificial ear canal 53 formed in the ear simulator 50.
摘要:
A machine that simulates movement during transport, for the testing of packaging elements, wherein the machine comprises a load platform (1), the lower part of said platform having attached thereto a plurality of upper ball joints (3, 61,71) with a ±30° rotation angle, coplanar with the axis of rotation of a rotating support (5, 5', 5"); and a lower platform (6) which is located opposite the load platform (1) and which is provided with anchors for attaching same to a vertical vibration table (25, 26); additionally, a central support (7) is located between the load platform (1) and the lower platform (6) and, furthermore, a plurality of mutually independent hydraulic servo-actuators (8,8',8") are attached between the upper spherical ball joints (3) and the lower ball joints (4), said servo-actuators (8,8',8") being placed along two perpendicular planes that pass through the centre of the rotating support (5, 5', 5"), forming a 90° angle.
摘要:
Methods and apparatus for exciting a structure and determining its structural integrity. In particular, methods of nonlinear analysis are used to compare first and second response datasets, each dataset resulting from a different excitation amplitude that the other dataset.
摘要:
L'invention concerne un procédé de test d'un système de stabilisation d'image dans un appareil de prise de vue (5), comprenant des étapes consistant à : soumettre l'appareil de prise de vue à des mouvements vibratoires rotatifs autour de deux axes de rotation distincts (X, Y), mesurer des caractéristiques (SV) des mouvements vibratoires rotatifs, asservir les mouvements vibratoires rotatifs à des valeurs de position de consigne (SP) et en tenant compte des caractéristiques mesurées des mouvements vibratoires, recueillir des images de l'appareil de prise de vue soumis aux vibrations et analyser les images recueillies,