Authors:
Hsi-Han Yeh,
Eric B. Nelson,
Andrew G. Sparks,
Volume: 1, Page 328 Paper number 2301
Abstract:
A tracking control law using a sliding mode framework is derived to
control a satellite formation. Hill's relative motion equations are
used to model the follower satellite's motion relative to the leader.
To minimize fuel required to maintain the formation, each satellite
is constrained to reside near a natural orbit. Control forces are applied
only to maintain the desired relative motion by correcting for initial
offsets and perturbation effects that tend to disperse the formation.
The control law is modified to account for the discontinuous nature
of the control forces available with the satellite propulsive thrusters.
Numerical simulations using a high-fidelity, nonlinear model demonstrate
the control law performance for the full nonlinear dynamics with high
order perturbations.
Authors:
Jorge E. Tierno,
Volume: 1, Page 334 Paper number 2302
Abstract:
In this paper we discuss the application of the perceptive control
theory to the control of satellites flying in formation. We present
the algorithms used and discuss some of their properties.
Authors:
A.J. Healey,
J. Kim,
Volume: 1, Page 340 Paper number 2303
Abstract:
Modeling and Simulation is an important tool for the evaluation of
new concept systems. In particular, new system concepts are being developed
for minefield reconnaissance and neutralization using robot vehicles.
Also, with an emphasis on low cost, these systems are being focussed
on multi-robot capabilities using fleets of similar and dissimilar
vehicles in cooperative behaviors. The problems of operating in the
very shallow water areas (VSW) are increased by the action of waves
and currents, uneven bottom topography, and noisy acoustic environments.
This paper will discuss the elements of modeling and simulation methodology
for the study of system performance analysis in minefield reconnaissance
and object mapping in Very Shallow Water (VSW) environments. Crawling
and swimming vehicles are considered, although the focus is on the
first. Vehicle locomotion models are proposed. Wave and current models
are discussed by reference to other ongoing research. The modeling
of object detection sensors, and vehicle navigation sensors are also
given. Using these principles given above, reference is made to the
importance of two types of simulator - a graphics based visualization
simulator that views the interactive behavior of robots and environmental
objects, and a Monte Carlo low resolution simulator that allows the
study of system effectiveness. In an example of a VSW operation with
crawling vehicles, results are given that illustrates the effect of
control logic parameters, on the time it takes to complete the reconnaissance
mission. Also, other control parameters are studied including the
effect of changes in the detection range of the primary sensor.
Authors:
Yasuhisa Hirata,
Kazuhiro Kosuge,
Volume: 1, Page 346 Paper number 2304
Abstract:
We propose a decentralized motion control algorithm of multiple mobile
robots transporting a single object in coordination. In this algorithm,
each robot is controlled as if it has a caster-like dynamics and transports
a single object in coordination with other robots without using the
geometric relations among robots. The proposed control algorithm is
experimentally applied to multiple mobile robots. Experimental results
illustrate the validity of the proposed control algorithm.
Authors:
Wei Kang,
Ning Xi,
Andrew G. Sparks,
Volume: 1, Page 352 Paper number 2305
Abstract:
A general method of controller design is developed in this paper for
the purpose of formation keeping and reconfiguration of multiple autonomous
vehicles. Controllers are designed to keep multiple vehicles in a required
formation, and to coordinate the vehicles in the presence of environmental
changes. The method is applicable to a large variety of autonomous
agents. Examples and simulations are given for ground vehicles, robotic
arms and satellites.
Authors:
Tsuyoshi Suzuki,
Takeshi Sekine,
Teruo Fujii,
Hajime Asama,
Isao Endo,
Volume: 1, Page 358 Paper number 2306
Abstract:
The paper discusses multi-robot teleoperation system considering cooperation
between human operator and multiple robots in inspection task. A prototype
of the teleoperation system is developed and implemented on an actual
testing platform that consists of multiple omni-directional mobile
robots. Cooperative formations among multiple mobile robots are proposed.
Performance of the developed system is examined through the experimental
example of an inspection task.
Authors:
James K. Hall,
Meir Pachter,
Volume: 1, Page 364 Paper number 1510
Abstract:
The flying of aircraft in formation necessitates the extension of the
theory of formation flight control to allow for three dimensional formation
maneuvers. A leader and wingman formation is considered. A rotating
reference frame attached to the wingman is used and special attention
is given to the motion of the leader relative to the wingman. A seven
state, three input, and three disturbance signal control system which
models the dynamics of a two-aircraft formation in three dimensional
space is developed. Two formation flight control concepts are investigated.
A proportional, integral, and derivative automatic control system
to maintain the wing aircraft in the specified formation geometry despite
the leader's maneuvers is designed, and its performance is examined
in simulation experiments.
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