Results 1 - 10 of 2,606

Kinematics And Open-Loop Control

by Of An Ilonator-Based, David J. Daniel , 1985
"... This paper describes the analysis and implementation of a motor drive control system for an intelligent wheelchair being developed at the Robotics Institute at Carnegie-Mellon University. The experimental mobile platform is mounted on four so-called Ilonators which permit motion in any direction wit ..."
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the platform under open-loop control. The paper includes a description of the motor-drive hardware implementation, and experimental results. The results of this work provide the foundation for the implementation of feedback control of the wheels and higher-level supervisory control.

Open-loop control of class-2 tensegrity towers

by Milenko Masic, Robert E. Skelton - Smart Structures And Materials 2004, volume 5383 , 2004
"... This paper concerns open-loop control laws for reconfiguration of tensegrity towers. By postulating the control strategy as an equilibrium tracking control, very little control energy is required. Several different reconfiguration scenarios are possible for different string connectivity schemes. Thi ..."
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This paper concerns open-loop control laws for reconfiguration of tensegrity towers. By postulating the control strategy as an equilibrium tracking control, very little control energy is required. Several different reconfiguration scenarios are possible for different string connectivity schemes

On time: Clocks, chronometers, and open-loop control

by Steven M. Lavalle, Magnus B. Egerstedt , 2007
"... Abstract — This paper addresses the peculiar treatment that time receives when studying control systems. For exam-ple, why is the ability to perfectly observe time assumed im-plicitly in virtually all control formulations? What happens if this implicit assumption is violated? It turns out that some ..."
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basic control results fall apart when time cannot be perfectly measured. To make this explicit, we introduce information space concepts that permit imperfect time information to be considered in the same way as imperfect state information. We then argue that classical open-loop control should

OPEN-LOOP CONTROL OF QUANTUM PARTICLE MOTION: EFFECTIVE SPLITTING IN MOMENTUM SPACE

by Babar Ahmad, Sergei Borisenok, Yuri Rozhdestvensky , 2007
"... Abstract. In this paper an effective quantum particle beam-splitter in the momentum space is realized in the frame of open-loop control scheme. We demonstrate for small interaction time that the splitting effect±40�k with summarized relative intensity in both main components is about 50 per cent fro ..."
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Abstract. In this paper an effective quantum particle beam-splitter in the momentum space is realized in the frame of open-loop control scheme. We demonstrate for small interaction time that the splitting effect±40�k with summarized relative intensity in both main components is about 50 per cent

Open-Loop-Control of Pore Formation in Semiconductor Etching

by Jens Christian Claussen, Jürgen Carstensen, Marc Christophersen, Sergiu Langa, Helmut Föll
"... Electrochemical etching of semiconductors gives rise to a wide variety of self-organized structures including fractal structures, regular and branching pores. The Current-Burst Model and the Aging Concept are considered to describe the dynamical behavior governing the structure formation. Here the s ..."
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the suppression of side-branching during pore growth is demonstrated by an open-loop-control method, resulting in pores with oscillating diameter. 1

Dynamically Feasible Trajectory and Open-Loop Control Design for Unmanned Airships

by Filoktimon Repoulias, Evangelos Papadopoulos , 2007
"... This paper describes a method for planning six DOF trajectories for an underactuated unmanned airship and for computing the open-loop controls. Beginning with a smooth inertial 3D trajectory to be tracked by the center of mass of the vehicle, the proposed algorithm, based on the dynamics of the syst ..."
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This paper describes a method for planning six DOF trajectories for an underactuated unmanned airship and for computing the open-loop controls. Beginning with a smooth inertial 3D trajectory to be tracked by the center of mass of the vehicle, the proposed algorithm, based on the dynamics

Open-loop control of three-dimensional wakes

by P. Poncet A, G. -h. Cottet B
"... We illustrate the problem of wake optimisation on the generic case of the three-dimensional cylinder. After a description of the numerical method, several optimisation strategies are presented, aiming at identifying vortex systems providing drag reduction or special topology of the flow. On the one ..."
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hand, strategies as simple as cylinder rotation or bidimensional stationary profiles of velocity are considered. On the other hand, an outlook of full 3D tangential controls is presented, which may be mixed or not with the simple strategies above.

DIGITALLY POSITIONED MICROMIRROR FOR OPEN-LOOP CONTROLLED APPLICATIONS

by Jianglong Zhang , Y C Lee , Victor M Bright , John Neff
"... ABSTRACT The power consumption and complexity of the closeloop control electronics are the major barriers that limit the applications of optical switches, beam steering devices and other micromirrors. To eliminate or lower the barriers, it is desirable to have a micromirror with precise, digitally ..."
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ABSTRACT The power consumption and complexity of the closeloop control electronics are the major barriers that limit the applications of optical switches, beam steering devices and other micromirrors. To eliminate or lower the barriers, it is desirable to have a micromirror with precise, digitally

Optimal Open-Loop Control of Vacations, Polling and Service Assignment

by Eitan Altman, Bruno Gaujal, Arie Hordijk , 1997
"... We consider in this paper the optimal open-loop control of vacations in queueing systems. The controller has to take actions without state information. We first consider the case of a single queue, in which the question is when should vacations be taken so as to minimize, in some general sense, work ..."
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We consider in this paper the optimal open-loop control of vacations in queueing systems. The controller has to take actions without state information. We first consider the case of a single queue, in which the question is when should vacations be taken so as to minimize, in some general sense

On spatial trajectory planning & open-loop control for underactuated AUVs

by Filoktimon Repoulias, Evangelos Papadopoulos - Proc. 8 th IFAC Symposium on Robot Control (SYROCO ‘06 , 2006
"... Abstract: This paper considers the problem of spatial planning and open-loop control for underactuated AUVs. Given a smooth inertial 3D trajectory to be followed by some vehicle point, the developed algorithm uses the vehicle dynamic model, and computes the 3D corresponding body-fixed linear and ang ..."
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Abstract: This paper considers the problem of spatial planning and open-loop control for underactuated AUVs. Given a smooth inertial 3D trajectory to be followed by some vehicle point, the developed algorithm uses the vehicle dynamic model, and computes the 3D corresponding body-fixed linear
Results 1 - 10 of 2,606