Kamilo Melo, L. Paez, Monica Hernandez, Alexandra Velasco, F. Calderon, C. Parra
{"title":"Preliminary studies on modular snake robots applied on de-mining tasks","authors":"Kamilo Melo, L. Paez, Monica Hernandez, Alexandra Velasco, F. Calderon, C. Parra","doi":"10.1109/LARC.2011.6086814","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086814","url":null,"abstract":"This paper addresses recent developments on Modular Snake Robots suited for applications on de-mining tasks. Inclusion of robotic platforms on the de-mining process will help tasks like the recognizance and perception of dangerous areas, minimizing human risk. As a mobile robot, the modular snake robot can move in a uneven terrain similar to a mined scenario. That is why, the main research efforts have been done on locomotion. Several contributions on this area are reported including gaits like: closed chain rolling, lateral rolling and a gait that use a helix shape both on the outside of cylinders. Another gait studied regards the swing movement of a modular robot chain hanging from one of its end modules. Contributions on robot architecture are reported here, including a distributed model predictive control and a multi-camera and sensor fusion. The perception problem of these robots also are researched by our lab and a pair of developments are shown here.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127288240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Step-size fuzzy control to maximum power point tracking algorithms for PV microgrid arrays","authors":"A. Ovalle, H. Chamorro, G. Ramos","doi":"10.1109/LARC.2011.6086831","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086831","url":null,"abstract":"Photo Voltaic (PV) power generation presents a high potential solution to the emerging energy needs and the pollution levels crisis around the world. PV cells have associated current-voltage nonlinear characteristics which vary according to irradiance levels, load impedance and temperature mainly. Maximum Power Point Tracking (MPPT) algorithms are relevant elements in economically viable PV systems. They seek to obtain all the available power from PV modules under every environmental condition. Perturb and Observe (P&O) and Incremental Conductance (IC) are well known MPPT algorithms that are commonly used. This paper proposes an improvement to these methods based on the adaptability under nonlinear conditions, and simplicity of Fuzzy Logic Control (FLC). The detailed design and the applicability in smart microgrids and distributed generation are presented. Comparison simulation results show a faster and adaptable behaviour of the fuzzy controlled algorithms developed.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130660268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study of robotics singularities using LEGO Mindstorms kit","authors":"Wudson Tome Sobrinho, R. Gonçalves","doi":"10.1109/LARC.2011.6086792","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086792","url":null,"abstract":"One of the major challenges of the modern educator is to teach the theoretical lessons with practical examples that can motivate students and help them understand the theory. The application of these examples will address a major problem for students in engineering the difficulty of understanding and seeing how a mechanical and/or mechatronic device functions in everyday life. This requires the use of tools that enable the construction of different prototypes of low cost to assist in student learning. Within this context this paper presents a pedagogic proposition based on the use of LEGO Mindstorms kits as a laboratorial tool in robotics lessons. In this paper is focused the use of LEGO Mindstorms kits for the understanding of singularities in parallel robotic structures. In this way are presented the parallel structure 5R and 3-RRR with the analysis of motion and singularity positions. The development of these prototypes allows a complete visualization of singularities problems, settings in which the structure loses control, facilitate the understanding, visualization and motivate the students.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126755115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of unknown inputs observer for a chemical process: Analysis of existence and observability based on phenomenological model","authors":"Mario Giraldo, H. Botero","doi":"10.1109/LARC.2011.6086823","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086823","url":null,"abstract":"This paper explains the existence and observability conditions for the design of an Unknown Inputs Observer (UIO) for a chemical process. First, a phenomenological interpretation for the existence of the observer is given from the transfer function of the linearized system. And secondly, the existence and observability conditions of the observer are verified algebraically evaluating the rank of a defined observability matrix. Both ways of verification are compared. Finally, an UIO is implemented and simulation results are presented.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126779813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Vidarte, Hector Fabio Florez Londono, Juan Diego Tascon Vidarte
{"title":"A substation automation system for the ECOPETROL power plants at Cantagallo and Yariguí","authors":"J. Vidarte, Hector Fabio Florez Londono, Juan Diego Tascon Vidarte","doi":"10.1109/LARC.2011.6086856","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086856","url":null,"abstract":"The following paper shows the birth and development of a distributed automation system at the Cantagallo and Yariguí electrical generation centers. An architecture based on MODBUS at the I/O devices layer and an Ethernet network as core for the communications is proposed. It is important to highlight that the Cantagallo center is operated remotely. System integration is implemented by a Vijeo Citect SCADA, there, the use of the several Modbus protocol versions is predominant at the generation centers hardware. It also shows the software involving the Quantum PLC programming, the HMI application and the SCADA which will be the main automation component. Currently the application is successfully working at the two ECOPETROL generation centers.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"302 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124268428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Characterization of a butterfly-type valve","authors":"Alberto Avila, C. Carvajal, C. Cotrino","doi":"10.1109/LARC.2011.6086857","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086857","url":null,"abstract":"A mathematical model and experimental measurement of the flow characteristics of a 3 in butterfly-type valve have been obtained and evaluated. Final control elements behavior plays an important role in the loop performance, so its features must be taken into account for a good controller design. This paper shows how the characterization of the valve was carried out relying on standards and technical recommendations. The inherent and installed flow characteristics of the valve were obtained by measuring flow and differential pressure across the valve. The corresponding instrumentation system setup was designed and implemented on the Pressure Tests Network in the Civil Engineering Department's Hydraulics Laboratory at the Pontificia Universidad Javeriana.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121610594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Poliane Torres Megda, Breno Almeida Esteves, M. Becker
{"title":"Determining forbidden steering directions for a passenger car in urban environments based on the velocity obstacle approach and use of trackers","authors":"Poliane Torres Megda, Breno Almeida Esteves, M. Becker","doi":"10.1109/LARC.2011.6086803","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086803","url":null,"abstract":"One of the most challenging tasks for autonomous passenger cars in urban-like environments is to select the ideal steering angle to avoid collisions with pedestrians and other vehicles. In order to determine the set of steering angles that must be avoided it is necessary to track mobile obstacles that surround the vehicle. This task is especially difficult in urban environments where a great variety of obstacles may induce the vehicle embedded controllers to take erroneous decisions. They need as much information as possible concerning the obstacle positions and speeds (direction and magnitude) in order to plan evasive maneuvers that avoid collisions. Unfortunately, obstacles close to vehicle embedded sensors frequently cause blind zones behind them where other obstacles could be hidden. In order to overcome this problem we developed an obstacle tracking module based only on 2D laser scan data. Its main parts consist of obstacle detection, obstacle classification, and obstacle tracking. In addition to this, we implemented a modified version of the velocity obstacle approach to determine the set of forbidden steering angles for a certain time window. The real data samplings were acquired in an urban-like environment in our University Campus using our test vehicle. The tests proved the applicability of the algorithms in urban-like environments.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117230511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Mondragón, P. Cervera, M. Olivares-Méndez, C. Martínez
{"title":"3D object following based on visual information for Unmanned Aerial Vehicles","authors":"I. Mondragón, P. Cervera, M. Olivares-Méndez, C. Martínez","doi":"10.1109/LARC.2011.6086794","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086794","url":null,"abstract":"This article presents a novel system and a control strategy for visual following of a 3D moving object by an Unmanned Aerial Vehicle UAV. The presented strategy is based only on the visual information given by an adaptive tracking method based on the color information, which jointly with the dynamics of a camera fixed to a rotary wind UAV are used to develop an Image-based visual servoing IBVS system. This system is focused on continuously following a 3D moving target object, maintaining it with a fixed distance and centered on the image plane. The algorithm is validated on real flights on outdoors scenarios, showing the robustness of the proposed systems agains winds perturbations, illumination and weather changes among others. The obtained results indicate that the proposed algorithms is suitable for complex controls task, such object following and pursuit, flying in formation, as well as their use for indoor navigation","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122962981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and development of humanoid robot ZERO","authors":"E. Hernandez, R. Velázquez","doi":"10.1109/LARC.2011.6086801","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086801","url":null,"abstract":"This paper overviews the mechanics of humanoid robot ZERO. ZERO is a bipedal walking platform with 21 degrees of freedom (DOF) powered by servomotors that perform reliable torque and precise motion. Made entirely from aluminum, it is lightweight (5.5 kg) and compact (height: 60 cm, width: 33 cm) while strong and robust. ZERO is capable of moving forward, backward, sideway, it can turn in any direction, lie down, and get up. In addition, ZERO performs object tracking and recognition using an on-board video camera. The primary motivation behind this project is to create our own platform for research into bipedal walking and control. In this paper, the design, implementation, and mechanical analysis of this prototype are presented and discussed.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"02 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127176911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Shared control based on roles for telerobotic systems","authors":"Javier Corredor, J. Sofrony","doi":"10.1109/LARC.2011.6086815","DOIUrl":"https://doi.org/10.1109/LARC.2011.6086815","url":null,"abstract":"The classic approach to teleoperation system design seeks to augment human capabilities and allow the execution fo tasks in a remote (possible hazardous) environment. Recent developments have provided robotic systems with additional autonomy, thus allowing the possibility of having collaboration between humans and robots in local scenarios. This paper presents preliminary ideas where the concept of human-robot collaboration is extended to the area of robotic systems operated remotely. Thanks to the studies made to ascertain how humans interact when performing physical tasks in a collaborative manner, it is possible to use such concepts to study human-robot interactions and create more trasnparent teleoperation systems. The idea of using role-based strategies to perform tasks via remote robotic interfaces is explored, where different interaction models are analysed via the observation of how the “role” of the interacting agents evolves as the task is being perfromed. Additionally, the paper presents some of the research areas that have provided the basis of the proposed approach, as well as the main challenges for the application of such teleoperation system. It is noteworthy to mention that one of the main challenges is to provide the system with adaptive and learning strategies that allow the agents to dynamically specialize and provide a more natural human-robot interaction.","PeriodicalId":419849,"journal":{"name":"IX Latin American Robotics Symposium and IEEE Colombian Conference on Automatic Control, 2011 IEEE","volume":"757 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122986638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}