In this paper the earth’s magnetic field is simulated precisely while the intensity and direction of the field are verified with one of the standard references for selected points on the earth and the results are compared with some low-order models. In another simulation, the complete model is compared with a common approximate model. The magnetic field in orbital frame is described and to empl...

A fault tolerant control (FTC) design technique against actuator stuck faults is investigated using integral-type sliding mode control (ISMC) with application to spacecraft attitude maneuvering control system. The principle of the proposed FTC scheme is to design an integral-type sliding mode attitude controller using on-line parameter adaptive updating law to compensate for the effects of stuc...

Nonlinear Predictive Control of Spacecraft John L. Crassidis F. Landis Markley Tobin C. Anthony Stephen F. Andrews Abstract A new approach for the control of a spacecraft with large angle maneuvers is presented. This new approach is based on a nonlinear predictive control scheme which determines the required torque input so that the predicted responses match the desired trajectories. This is ac...

A DVANCES in networking and distributed computing enable numerous applications for multivehicle systems including space-based observations, future combat systems, smart homes, enhanced surveillance systems, hazardous material handling systems, and reconfigurable sensing systems. In some applications, it is desirable that multiple vehicles maintain a geometric configuration and achieve relative ...

ORBCOMM is a LEO communications spacecraft, providing global point to point packet messaging. Two are in operation now, and the rest of the (eventually 36) constellation design spacecraft are currently in integration and test. The ORBCOMM ACS mission is to point a communications antenna to nadir, while maintaining continuous Sun tracking via spacecraft yaw maneuvers. This mission is achieved us...

In this paper we present an experimental platform for relative attitude control of spacecraft. The platform is part of the AUVSAT project at the Norwegian University of Science and Technology, a project with the goal of creating an underwater experimental laboratory for formation control of underwater vehicles and spacecraft. In the following we present the design and the specifications leading...