Evaluation of dynamics and positioning accuracy of robotic system operating in heavy loaded high speed conditions

In this article the dynamics and positioning accuracy of “MOTOMAN SSF2000” robotic system which is operating in heavy loaded high speed conditions was researched. To explore the dynamics of “MOTOMAN SFF2000” was used mobile processing equipment of „Brüel & Kjær”. Mechanical vibrations were tested at two different locations of the robot. One of the accelerometers was placed on the robot's base and the other one was placed on the robot's hand. Accelerometers registered the vibrations in three different axes with three different weigths. The mechanical vibrations and positioning accuracy were explored moving robot‘s hand in a linear direction

Evaluation of dynamics and positioning accuracy of robotic system operating in heavy loaded high speed conditions

In this article the dynamics and positioning accuracy of “MOTOMAN SSF2000” robotic system which is operating in heavy loaded high speed conditions was researched. To explore the dynamics of “MOTOMAN SFF2000” was used mobile processing equipment of „Brüel & Kjær”. Mechanical vibrations were tested at two different locations of the robot. One of the accelerometers was placed on the robot's base and the other one was placed on the robot's hand. Accelerometers registered the vibrations in three different axes with three different weigths. The mechanical vibrations and positioning accuracy were explored moving robot‘s hand in a linear direction

Rotary motion transmission and stabilization devices

To connect rotors, to transmit and stabilize rotation motion a new class of rotary motion transmission and stabilization devices (RMTSD) was developed. They include the rings which deform axialy, radially and at an angle the radial segments, etc. with joined concentrated inertial, dissipative and elastic elements. RMTSD design schemes are copyrighted and covered by the patents of the USA, England and Germany. The classification of RMTSD development is performed according to the following characteristic features: dynamic characteristics, kind of elastically creeping elements, peculiarities of design elements, fastening, materials, etc. The classification presented gives the possibility to develop lots of constructions of new RMTSD of this type

Evolution of Action Potential Alternans in Rabbit Heart during Acute Regional Ischemia

This study investigates the development of the spatiotemporal pattern of action potential alternans during acute regional ischemia. Experiments were carried out in isolated Langendorff-perfused rabbit heart using a combination of optical mapping and microelectrode recordings. The alternans pattern significantly changed over time and had a biphasic character reaching maximum at 6–9 min after occlusion. Phase I (3–11 minutes of ischemia) is characterized by rapid increase in the alternans magnitude and expansion of the alternans territory. Phase I is followed by gradual decline of alternans (Phase II) in both magnitude and territory. During both phases we observed significant beat-to-beat variations of the optical action potential amplitude (OAPA) alternans. Simultaneous microelectrode recordings from subepicardial and subendocardial layers showed that OAPA alternans coincided with intramural 2 : 1 conduction blocks. Our findings are consistent with the modeling studies predicting that during acute regional ischemia alternans can be driven by 2 : 1 conduction blocks in the ischemic region