Automatic Control

Misyurov D.A. Dialectical formulas based on the binary notation as the development formulas // Credo New. 2012. №2

by Dmitry Misyurov

The article suggests dialectical formulas based on the binary notation as the development formulas: formula with... more The article suggests dialectical formulas based on the binary notation as the development formulas: formula with dominant and the non-dominant elements; universal formula; formula with symbolic weight of elements; tautological formula. For example, it suggests an opportunity to use the dialectical formulas for modeling and artificial intelligence creation, etc.

Psychologie, intelligence artificielle et automatique

by Guy Tiberghien

Anima: An Exploration of Automatic Writing Concerning the Feminine.

by Rickey Lee Bauman

Short and introductory. Written for an Undergraduate Psychology course. Ignore credentials. Learn something different.

This essay will be a track record of my personal experiences over the past years as I have attempted through this... more This essay will be a track record of my personal experiences over the past years as I have attempted through this writing to “withdraw” projections from actual persons and to integrate the contents of these fantasies into my overall well-functioning psyche.

Control of an Inverted Pendulum Using an Ionic Polymer-Metal Composite Actuator

by Maarja Kruusmaa

A. Hunt, Z. Chen, X. Tan, M. Kruusmaa. Control of an Inverted Pendulum Using an Ionic Polymer-Metal Composite Actuator, In Proc. of 2010 IEEE/ASME International Conference on Advanced Intelligent Mechatronics.

Ionic polymer-metal composites (IPMCs) are electroactive materials that bend under an applied electric field. Existing... more Ionic polymer-metal composites (IPMCs) are electroactive materials that bend under an applied electric field. Existing work has typically dealt with the control of IPMC actuators themselves. In this paper we investigate the stabilization of an inverted pendulum on a cart using an IPMC actuator. Different from the traditional setting of cart- pendulum systems, we require that the voltage on the IPMC actuator stay close to zero, to prolong the actuator life and reduce power consumption. A state-space model is developed for the system, based on which an LQR controller together with an observer is designed. The proposed control scheme is able to stabilize the inverted pendulum for the entire duration of the experiment (five minutes). These results indicate that IPMC actuators hold potential for more sophisticated control applications.

Single Board Computer Based Building Security Management System: Contactless Smart Card for Automatic Door Access Control System

by Udayanto Dwi Atmojo

Presented in IEEE International Conference on Mechanical, Industrial, and Manufacturing Technology (MIMT) 2011 in Singapore, 26-28 February 2011

A building security management system based on
single board computer is currently under development. In this more A building security management system based on
single board computer is currently under development. In this
paper, a part of the system which is an automatic door access
system using contactless smart card for identification is
discussed. Running test shows that the system is working as
expected. The system can identify multiple users each with
different card. More specific access such as access by day,
hour, even minute can be implemented. Alarm is used as
indicator if the door is unlocked or any forced intrusion is
happening. The corresponding system is going to be integrated
in a building security management system to provide safer
work environment

Single Board Computer Based Building Security Management System: Contactless Smart Card for Automatic Door Access Control System

by Udayanto Dwi Atmojo

Published in journal of Applied Mechanics and Materials Vols. 110-116 (2012) pp 4816-4822
© (2012) Trans Tech Publications, Switzerland
doi:10.4028/www.scientific.net/AMM.110-116.4816

A building security management system based on single board computer is currently
under development. In this... more A building security management system based on single board computer is currently
under development. In this paper, a part of the system which is an automatic door access system
using contactless smart card for identification is discussed. Running test shows that the system is
working as expected. The system can identify multiple users each with different card. More specific
access such as access by day, hour, even minute can be implemented. Alarm is used as indicator if
the door is unlocked or any forced intrusion is happening. The corresponding system is going to be
integrated in a building security management system to provide safer work environment.

Passive internet-based crane teleoperation with haptic aids

by Alejandro Fernández Villaverde

A Fernández Villaverde, C Raimúndez, A Barreiro (2012) International Journal of Control, Automation, and Systems, 10(1):78-87

Crane operation is a challenging task, due to the combined problem of obstacle avoidance and load swing suppression in... more Crane operation is a challenging task, due to the combined problem of obstacle avoidance and load swing suppression in underactuated conditions. This paper presents a human-machine interface that increases the operator’s perception of a gantry crane’s workspace. With this aim, a virtual environment resembling the workspace is connected with a haptic device. This allows the user to receive not only visual but also tactile feedback, thus increasing maneuvering safety. Additionally, this capability is integrated in a teleoperation setup, adopting a passivity-based control approach that guarantees overall stability. This includes also the design of controllers by means of the IDA-PBC method. Experimental results carried out with a laboratory crane show its feasibility for internet-based teleoperation and demonstrate the improvements on the system performance.

A Mood Moderation of the Extrinsic Affective Simon Task

by Nicolas Vermeulen

Modeling And Simulation Of Prolate Dual-Spin Satellite Dynamics In An Inclined Elliptical Orbit: Case Study Of Palapa B2R Satellite

by Agus Budiyono

Symposium on Aerospace Science and Technology, Jakarta, 2005

In response to the interest to re-use Palapa B2R satellite nearing its End of Life (EOL) time, an idea to incline the... more In response to the interest to re-use Palapa B2R satellite nearing its End of Life (EOL) time, an idea to incline the satellite orbit in order to cover a new region has emerged in the recent years. As a prolate dual-spin vehicle, Palapa B2R has to be stabilized against its internal energy dissipation effect. This work is focused on analyzing the dynamics of the reusable satellite in its inclined orbit. The study discusses in particular the stability of the prolate dual-spin satellite under the effect of perturbed field of gravitation due to the inclination of its elliptical orbit. Palapa B2R physical data was substituted into the dual-spin's equation of motion. The coefficient of zonal harmonics J2 was induced into the gravity-gradient moment term that affects the satellite attitude. The satellite's motion and attitude were then simulated in the perturbed gravitational field by J2, with the variation of orbit's eccentricity and inclination. The analysis of the satellite dynamics and its stability was conducted for designing a control system for the vehicle in its new inclined orbit.

Onboard Multivariable Controller Design for a Small Scale Helicopter Using Coefficient Diagram Method

by Agus Budiyono

Proceedings of the ICEST, Seoul, Korea, May 2005

A mini scale helicopter exhibits not only increased sensitivity to control inputs and disturbances, but also higher... more A mini scale helicopter exhibits not only increased sensitivity to control inputs and disturbances, but also higher bandwidth of its dynamics. These properties make model helicopters, as a flying robot, more difficult to control. The dynamics model accuracy will determine the performance of the designed controller. It is attractive in this regards to have a controller that can accommodate the unmodeled dynamics or parameter changes and perform well in such situations. Coefficient Diagram Method (CDM) is chosen as the candidate to synthesize such a controller due to its simplicity and convenience in demonstrating integrated performance measures including equivalent time constant, stability indices and robustness. In this study, CDM is implemented for a design of multivariable controller for a small scale helicopter during hover and cruise flight. In the synthesis of MIMO CDM, good design common sense based on hands-on experience is necessary. The low level controller algorithm is designed as part of hybrid supervisory control architecture to be implemented on an onboard computer system. Its feasibility and performance are evaluated based on its robustness, desired time domain system responses and compliance to hard-real time requirements.

Fluid Flow Control: a Vision-based Approach

by Romeo Tatsambon

Co-authored with Christophe Collewet, accepted for publication in the International Journal of Flow Control

Cooperative Localization of An Acoustic Source Using Towed Hydrophone Arrays

by Darren Maczka

Implementation of a Cooperative Navigation Algorithm on a Platoon of Autonomous Underwater Vehicles

by Darren Maczka

Trajectory model validation using newly developed altitude-controlled balloons during the International Consortium for Atmospheric Research on Transport and Transformations 2004 campaign

by Darren Maczka

I didn't actually write anything.  I just built the electronics and implemented the onboard controller for the balloons and assisted with field experiments.

During the summer of 2004, five altitude-controlled tracking balloons were flown as part of the International... more During the summer of 2004, five altitude-controlled tracking balloons were flown as part of the International Consortium for Atmospheric Research on Transport and Transformations (ICARTT) campaign. These Controlled Meteorological (CMET) balloons, newly developed at the University of Massachusetts, are notable for their light weight (∼1 kg mass), efficient altitude control, ease of launch, long-duration flight capability, and ability to perform repeated quasi-Lagrangian soundings. The balloons were embedded in urban plumes from New York and Boston which they tracked over New England, eastern Canada, and the Atlantic Ocean while maintaining a nearly constant altitude. The flights ranged from 10 to 111 hours and covered a maximum distance of 3000 km. Balloon flight tracks are used here to assess the accuracy of trajectory models during intensive aircraft sampling periods. A new method is presented for increasing the number of available reference trajectories by dividing the balloon flights into shorter segments for statistical analysis. For trajectory durations between 2 and 12 hours, mean trajectory errors are found to be approximately 26% and 34% of the flight distance for ECMWF-based and GFS-based trajectories, respectively. Anomalously large model errors observed during three of the flights are found to be the result of a narrow low-level jet (15 July) and synoptic-scale flow patterns (9 and 10 August). The results from this study should be useful to researchers evaluating the performance of trajectory models and chemical transport models during the ICARTT campaign. Complete CMET balloon and model trajectory data sets are available as a supplement to this paper.

Deduction without awareness

by Carlo Reverberi

Reverberi, C., Pischedda, D., Burigo, M., & Cherubini, P. (2012). Deduction without awareness. Acta psychologica, 139(1), 244-53. doi:10.1016/j.actpsy.2011.09.011

We investigated whether two basic forms of deductive inference, Modus Ponens and Disjunctive Syllogism, occur... more We investigated whether two basic forms of deductive inference, Modus Ponens and Disjunctive Syllogism, occur automatically and without awareness. In Experiment 1, we used a priming paradigm with a set of conditional and disjunctive problems. For each trial, two premises were shown. The second premise was presented at a rate designed to be undetectable. After each problem, participants had to evaluate whether a newly-presented target number was odd or even. The target number matched or did not match a conclusion endorsed by the two previous premises. We found that when the target matched the conclusion of a Modus Ponens inference, the evaluation of the target number was reliably faster than baseline even when participants reported that they were not aware of the second premise. This priming effect did not occur for any other valid or invalid inference that we tested, including the Disjunctive Syllogism. In Experiment 2, we used a forced-choice paradigm in which we found that some participants were able to access some information on the second premise when their attention was explicitly directed to it. In Experiment 3, we showed that the priming effect for Modus Ponens was present also in subjects who could not access any information about P(2). In Experiment 4 we explored whether spatial relations (e.g., "a before b") or sentences with quantifiers (e.g., "all a with b") could generate a priming effect similar to the one observed for Modus Ponens. A priming effect could be found for Modus Ponens only, but not for the other relations tested. These findings show that the Modus Ponens inference, in contrast to other deductive inferences, can be carried out automatically and unconsciously. Furthermore, our findings suggest that critical deductive inference schemata can be included in the range of high-level cognitive activities that are carried out unconsciously.

Online statistical estimation for vehicle control: A tutorial

by Christos Dimitrakakis

Composite material and piezoelectric coefficient uncertainty effects on structural health monitoring using feedback control gain as damage indicators

by Ranjan Ganguli

Dynamics and Control of High-Rise Buildings under Multidirectional Wind Loads

by Aly Mousaad Aly Sayed Ahmed

Aly Mousaad Aly, Alberto Zasso, and Ferruccio Resta
Smart Materials Research, vol. 2011, Article ID 549621, 15 pages, 2011. doi:10.1155/2011/549621

This paper presents a procedure for the response prediction and reduction in high-rise buildings under... more This paper presents a procedure for the response prediction and reduction in high-rise buildings under multidirectional wind loads. The procedure is applied to a very slender tall building that is instructive. The structure is exposed to both cross-wind and along-wind loads obtained from pressure measurements on a rigid model (scaled 1 : 100) that was tested in a wind tunnel with two different configurations of the surroundings. In the theoretical formulation, dynamic equations of the structure are introduced by finite element and 3D lumped mass modeling. The lateral responses of the building in the two directions are controlled at the same time using tuned mass dampers (TMDs) and active tuned mass dampers (ATMDs) commanded by LQR and fuzzy logic controllers, while the effects of the uncontrolled torsional response of the structure are simultaneously considered. Besides their simplicity, fuzzy logic controllers showed similar trend as LQR controllers under multidirectional wind loads. Nevertheless, the procedure presented in this study can help decision makers, involved in the design process, to choose among innovative solutions like structural control, different damping techniques, modifying geometry, or even changing materials.

A New Approach for Fluid Flows Control

by Romeo Tatsambon

Co-authored with Christophe Collewet and Etienne Memin. Invited paper to the symposium on "Advances in Control of Fluid Dynamics and Challenges facing the US Defense Department's thrust on Unmanned Autonomous Systems" for the SIAM Conference on Control and Its Applications, Baltimore, Maryland, July 2011.

Here is a demo:
Here is a demo:
http://www.irisa.fr/fluminance/demos/RomeoTatsambon/poiseuille.html

Fluid Flows Control using Visual Servoing

by Romeo Tatsambon

Co-authored with Christophe Collewet, published in IFAC-WC, Milan, Italy, August 2011

See a demo here See a demo here http://www.irisa.fr/fluminance/demos/RomeoTatsambon/poiseuille.html