Download or read book An Umbilical Model for the Active Rack Isolation System written by Jason Kelly Rupert and published by . This book was released on 2001 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Improved Umbilical Model for the Active Rack Isolation System written by Jason K. Rupert and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Kane s Dynamics Model for the Active Rack Isolation System written by and published by . This book was released on 2001 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Kane s Dynamics Model for the Active Rack Isolation System Part 3 Addition of Umbilicals to the Nonlinear Model written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-30 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the late 1980s, microgravity researchers began to voice their concern that umbilical-transmitted energy could significantly degrade the acceleration environment of microgravity space science experiments onboard manned spacecraft. Since umbilicals are necessary for many experiments, control designers began to seek ways to compensate for these "indirect" disturbances. Hampton, et al., used the Kane s method to develop a model of the active rack isolation system (ARIS) that includes (1) actuator control forces, (2) direct disturbance forces, and (3) indirect, actuator-transmitted disturbances. Their model does not, however, include the indirect, umbilical-transmitted disturbances. Since the umbilical stiffnesses are not negligible, these indirect disturbances must be included in the model. Until the umbilicals have been appropriately included, the model will be incomplete. This Technical Memorandum presents a nonlinear model of ARIS with umbilicals included. Model verification was achieved by utilizing two commercial-off-the-shelf software tools. Various forces and moments were applied to the model to yield simulated responses of the system. Plots of the simulation results show how various critical points on an ARIS-outfitted international standard payload rack behave under the application of direct disturbances, indirect disturbances, and control forces. Simulations also show system response to a variety of initial conditions.Rupert, J. K. and Hampton, R. D. and Beech, G. S.Marshall Space Flight CenterMICROGRAVITY; SPACEBORNE EXPERIMENTS; ADVANCED RANGE INSTRUMENTATION SHIP; GRAVITATIONAL EFFECTS; MANNED SPACECRAFT; PROVING; ACTUATORS; NONLINEARITY; PAYLOADS; CRITICAL POINT

Download or read book A High Fidelity Model of the Active Rack Isolation System written by Geoffrey S. Beech and published by . This book was released on 2000 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A High fidelity Dynamic Model for the Active Rack Isolation System written by R. David Hampton and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Simulation Capability for the Space Station Active Rack Isolation System written by and published by . This book was released on 1998 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AIAA Aerospace Sciences Meeting and Exhibit 42nd written by and published by . This book was released on 2004 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Validation of a Kane s Dynamics Model for the Active Rack Isolation System written by Geoffrey S. Beech and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Simulation Capability for the Active Rack Isolation System written by Terry Lee Johnson and published by . This book was released on 1997 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 38th Aerospace Sciences Meeting and Exhibit written by and published by . This book was released on 2000 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Collection of Technical Papers written by and published by . This book was released on 1997 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 41st AIAA Aerospace Sciences Meeting Exhibit written by and published by . This book was released on 2003 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Commerce Business Daily written by and published by . This book was released on 1997-12-31 with total page 1512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microgravity News written by and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deformation and Flexibility Equations for Aris Umbilicals Idealized as Planar Elastica written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Space Station relies on the active rack isolation system (ARIS) as the central component of an integrated, stationwide strategy to isolate microgravity space-science experiments. ARIS uses electromechanical actuators to isolate an international standard payload rack from disturbances due to the motion of the Space Station. Disturbances to microgravity experiments on ARIS isolated racks are transmitted primarily via the ARIS power and vacuum umbilicals. Experimental tests indicate that these umbilicals resonate at frequencies outside the ARIS controller s bandwidth at levels of potential concern for certain microgravity experiments. Reduction in the umbilical resonant frequencies could help to address this issue. This work documents the development and verification of equations for the in-plane deflections and flexibilities of an idealized umbilical (thin, flexible, inextensible, cantilever beam) under end-point, in-plane loading (inclined-force and moment). The effect of gravity is neglected due to the on-orbit application. The analysis assumes an initially curved (not necessarily circular), cantilevered umbilical with uniform cross-section, which undergoes large deflections with no plastic deformation, such that the umbilical slope changes monotonically. The treatment is applicable to the ARIS power and vacuum umbilicals under the indicated assumptions.Hampton, R. David and Leamy, Michael J. and Bryant, Paul J. and Quraishi, NaveedJohnson Space CenterFLEXIBILITY; INTERNATIONAL SPACE STATION; MICROGRAVITY; UMBILICAL CONNECTORS; ELASTIC DEFORMATION; PLANAR STRUCTURES; ELECTROMECHANICAL DEVICES; LOADS (FORCES); PAYLOADS; RESONANT FREQUENCIES; ACTUATORS; CANTILEVER BEAMS; GRAVITATIONAL EFFECTS

Download or read book 17th International Microgravity Measurements Group Meeting written by and published by . This book was released on 1998 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: