Autonomous system (mathematics)

About: Autonomous system (mathematics) is a research topic. Over the lifetime, 1648 publications have been published within this topic receiving 38373 citations.

Etherbot - An autonomous mobile robot on a local area network radio tether

Abstract: It is well understood in the robotics research community that an autonomous mobile robot which is physically tethered to extend battery power limits, harness more powerful computational resources, allow convenient monitoring of sensor and process components or to increase the pay load is, at best, just a laboratory curio since the tether renders the vehicle more or less useless in many real working situations because of potential entanglement and actual range limitations. This paper demonstrates that it is feasible and advantageous to build a mobile robot which can navigate competently in an initially unknown and time-varying obstacle cluttered environment with most of the above advantages of tethered operation but without a physical tether; instead, a virtual tether based on a radio ethernet bridge is used.

Hopf bifurcation of codimension one and dynamical simulation for a 3d autonomous chaotic system

Abstract: In this paper, a 3D autonomous system, which has only sta- ble or non-hyperbolic equilibria but still generates chaos, is presented. This system is topologically non-equivalent to the original Lorenz sys- tem and all Lorenz-type systems. This motivates us to further study some of its dynamical behaviors, such as the local stability of equilibrium points, the Lyapunov exponent, the dissipativity, the chaotic waveform in time domain, the continuous frequency spectrum, the Poincar e map and the forming mechanism for compound structure of its special cases. Especially, with the help of the Project Method, its Hopf bifurcation of codimension one is in detailed formulated. Numerical simulation results not only examine the corresponding theoretical analytical results, but also show that this system possesses abundant and complex dynamical properties not solved theoretically, which need further attention.

U. S. Air Force Phillips Laboratory Autonomous Space Navigation Experiment

Abstract: The Air Force Phillips Laboratory’s Technology for Autonomous Operational Survivability (TAOS) space experiment is scheduled for launch on an Air Force Space Test Program Space Test Experiment Platform (STEP) spacecraft in early 1993. The mission will test and evaluate two navigation systems that support autonomous satellite navigation. They are the Microcosm Autonomous Navigation System (MANS) and the Rockwell Autonetics Six-Channel Global Positioning System (GPS) Receiver. MANS is a true autonomous system that uses horizon scanners, modified for Sun and Moon detection, as primary measurement devices to determine position, velocity, and attitude and estimate position and velocity using a Kalman filter. MANS supplemental sensors include GPS and an inertial measurement unit (IMU). The Rockwell miniature GPS receiver is a semi-autonomous system which accesses the GPS network to determine spacecraft position, velocity, and time. Position and velocity reference data will be generated using direct measurements from Air Force Satellite Control Network (AFSCN) remote tracking stations (RTS), orbit reconstruction based on on-board beaconry, and post-processed GPS data and solutions. The attitude reference will be provided by an on-board strapdown IMU.