Renewing solar science : the Solar Maximum Repair Mission /

"EP-206."

Repairing Solar Max : the Solar Maximum Repair Mission /

"EP-205."

SHEAL II, NASA's Shuttle High-Energy Astrophysics Laboratory : broad band X-ray telescope/diffuse X-ray spectrometer /

Title from cover.

A new framework for force feedback teleoperation of robotic vehicles based on optical flow

This paper proposes the use of optical flow from a moving robot to provide force feedback to an operator's joystick to facilitate collision free teleoperation. Optic flow is measured by wide angle cameras on board the vehicle and used to generate a virtual environmental force that is reflected to the user through the joystick, as well as feeding back into the control of the vehicle. The coupling between optical flow (velocity) and force is modelled as an impedance - in this case an optical impedance. We show that the proposed control is dissipative and prevents the vehicle colliding with the environment as well as providing the operator with a natural feel for the remote environment. The paper focuses on applications to aerial robotics vehicles, however, the ideas apply directly to other force actuated vehicles such as submersibles or space vehicles, and the authors believe the approach has potential for control of terrestrial vehicles and even teleoperation of manipulators. Experimental results are provided for a simulated aerial robot in a virtual environment controlled by a haptic joystick.

The practical application of space nuclear power in the 1960's for the International Astronautical Congress, Stockholm, Sweden, August 15-20, 1960 /

"Work done under AEC Contract: AT911-1)-GEN-8."

Proceedings of a conference held at Goddard Space Flight Center, Greenbelt, Maryland, June 15-16, 1970.

Includes bibliographical references.

Space measurements survey: Instruments and spacecraft, October 1957-March 1965.

Mode of access: Internet.

Preliminary criteria for the fracture control of space shuttle structures.

"Compiling, integrating, and editing of the document were performed by the Design Criteria Program Office of the McDonnell Douglas Astronautics Company under the direction of the Langley Research Center's Structural Systems Office (SSO)."

Pre-development study of a heat flux measurement device suitable for use on flight vehicles,

"Project no. AA-1577-Y. Subcontract no. 112705."

Space vehicle displays design criteria.

"Prepared under the direction of an advisory committee chaired by Dr. Jerome I. Elkind...Preparation of the monograph was directed by Dr. Thomas J. Triggs at Bolt Beranek and Newman, Inc."

Space vehicle gyroscope sensor applications.

Cover title.

Advances in sterilization and decontamination : a survey submitted to National Aeronautics and Space Administration, Langley Research Center, Hampton, Virginia /

On cover: Technology utilization.

11th Space Simulation Conference : proceedings of a symposium held at Lyndon B. Johnson Space Center, Houston, Texas, September 23-25,1980 /

Includes bibliographical references.

Outer-space environment models for use with space vehicle simulators.

"Project no. 6114, task no. 60806. Prepared under Contract no. AF 33(616)-6858 by W. A. Livingston Jr. of the Cornell Aeronautical Laboratory, Inc."

Shieldose : a computer code for space-shielding radiation dose calculations /

Includes bibliographical references (p. 29).