Anthony Mandow

Anthony Mandow
University of Malaga | UMA · Department of System Engineering and Automatics

Ph. D.

About

86
Publications
79,609
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,719
Citations

Publications

Publications (86)
Conference Paper
Este artículo aborda la identificación de parámetros borrosos mediante técnicas de optimización de enjambre de partículas (PSO) y su aplicación al control de un sistema de suspensión activa. En particular, se adopta un controlador de tipo Takagi-Sugeno de orden cero con Partición Difusa Estándar de sus antecedentes. A diferencia de trabajos previos...
Article
Full-text available
In the field of rescue robotics, data collection about the environment and efficient communications are fundamental for the success of search and rescue missions. Digitalization provides new ways of detecting and localizing potential victims via the wireless devices carried by the users. Nowadays, the number of personal Bluetooth low energy wearabl...
Article
Full-text available
Cloud robotics and advanced communications can foster a step-change in cooperative robots and hybrid wireless sensor networks (H-WSN) for demanding environments (e.g., disaster response, mining, demolition, and nuclear sites) by enabling the timely sharing of data and computational resources between robot and human teams. However, the operational c...
Chapter
El uso de imágenes de los espectros visible (RGB) e infrarrojo térmico (TIR) para la detección de objetos puede resultar crucial en aplicaciones donde las condiciones de visibilidad están limitadas, como la robótica para búsqueda y rescate en catástrofes. Para ello resulta beneficioso analizar cómo las técnicas de aprendizaje profundo basadas en re...
Article
Full-text available
This article presents a collection of multimodal raw data captured from a manned all-terrain vehicle in the course of two realistic outdoor search and rescue (SAR) exercises for actual emergency responders conducted in Málaga (Spain) in 2018 and 2019: the UMA-SAR dataset. The sensor suite, applicable to unmanned ground vehicles (UGVs), consisted of...
Chapter
Natural and human-made disasters require effective victim assistance and last-mile relief supply operations with teams of ground vehicles. In these applications, digital elevation models (DEM) can provide accurate knowledge for safe vehicle motion planning but grid representation results in very large search graphs. Furthermore, travel time, which...
Conference Paper
Los grupos de ascensores con sistema de preselección de destino persiguen la reducción del tiempo de espera en edificios de mediana y gran altura como hoteles o bloques de oficinas. En este tipo de sistemas, los pasajeros se dirigen al ascensor de acuerdo con el destino que hayan indicado en un panel exterior. El presente trabajo aborda la verifica...
Conference Paper
Dentro de los procedimientos de respuesta a emergencias, la Primera Intervención consiste en la toma de contacto con la zona de crisis mediante la recogida de información relevante que permita decidir y organizar la entrada de los equipos de rescate. Las labores de primera intervención constituyen una aplicación significativa de la robótica de resc...
Conference Paper
El despliegue de plataformas robóticas como apoyo a la gestión de situaciones de emergencia constituye un reto que persigue mejorar la eficiencia en misiones de búsqueda y rescate. Este artículo propone un planificador estratégico para el rescate de víctimas mediante un equipo de robots terrestres. Este sistema inteligente permitirá planificar las...
Conference Paper
El despliegue de plataformas robóticas como apoyo a la gestión de situaciones de emergencia constituye un reto que persigue mejorar la eficiencia en misiones de búsqueda y rescate. Este artículo propone un planificador estratégico para el rescate de víctimas mediante un equipo de robots terrestres. Este sistema inteligente permitirá planificar las...
Article
Full-text available
Multi-beam lidar (MBL) rangefinders are becoming increasingly compact, light, and accessible 3D sensors, but they offer limited vertical resolution and field of view. The addition of a degree-of-freedom to build a rotating multi-beam lidar (RMBL) has the potential to become a common solution for affordable rapid full-3D high resolution scans. Howev...
Article
Crossing surface discontinuities, such as ditches or curbs in urban environments, is a relevant navigation issue for ground mobile robots. This paper proposes a maneuver for negotiating surface discontinuities for a hybrid locomotion system consisting on a skid-steer wheeled vehicle with a single caster-leg mechanism. This maneuver is appropriate f...
Article
Full-text available
Improving the effectiveness of spatial shape features classification from 3D lidar data is very relevant because it is largely used as a fundamental step towards higher level scene understanding challenges of autonomous vehicles and terrestrial robots. In this sense, computing neighborhood for points in dense scans becomes a costly process for both...
Conference Paper
Wheeled mobile robots on inclined terrain can slide down due to loss of traction and gravity. This type of instability, which is different from tip-over, can provoke uncontrolled motion or get the vehicle stuck. This paper proposes slide-down prevention by real-time computation of a straightforward stability margin for a given ground-wheel friction...
Chapter
The paper addresses terrain modeling for mobile robots with fuzzy elevation maps by improving computational speed and performance over previous work on fuzzy terrain identification from a three-dimensional (3D) scan. To this end, spherical sub-sampling of the raw scan is proposed to select training data that does not filter out salient obstacles. B...
Article
Navigation of many mobile robots relies on environmental information obtained from three-dimensional (3D) laser scanners. This paper presents a new 360° field-of-view 3D laser scanner for mobile robots that avoids the high cost of commercial devices. The 3D scanner is based on spinning a Hokuyo UTM-30LX-EX two-dimensional (2D) rangefinder around it...
Conference Paper
This paper addresses classification of 3D point cloud data from natural environments based on voxels. The proposed model uses multi-layer perceptrons to classify voxels based on a statistic geometric analysis of the spatial distribution of inner points. Geometric features such as tubular structures or flat surfaces are identified regardless of thei...
Conference Paper
Navigability assessment is useful for planning obstacles free trajectories in autonomous navigation tasks in 3D environments. Based on Geometric-Featured Voxel (GFV) maps developed in previous works, this paper proposes a method for 2D occupancy grid generation which is efficient for local navigation in natural environments. Built from a point clou...
Conference Paper
Mobile robot navigation through sloped terrains is a relevant problem for field robotics. In this context, mobile manipulators can improve tip-over stability by exerting ground contact with the end-effector of the onboard arm. However, this contact can affect vehicle steerability. This paper proposes a case study on the effect of arm ground contact...
Article
Full-text available
Many applications, like mobile robotics, can profit from acquiring dense, wide-ranging and accurate 3D laser data. Off-the-shelf 2D scanners are commonly customized with an extra rotation as a low-cost, lightweight and low-power-demanding solution. Moreover, aligning the extra rotation axis with the optical center allows the 3D device to maintain t...
Article
Full-text available
This paper proposes lab work for learning fault detection and diagnosis (FDD) in mechatronic systems. These skills are important for engineering education because FDD is a key capability of competitive processes and products. The intended outcome of the lab work is that students become aware of the importance of faulty conditions and learn to desig...
Conference Paper
Full-text available
This paper addresses education on scientific publication skills for post-graduate engineering students. In particular, a project-based learning strategy is proposed to lead students through the preparation a research paper. Expected learning outcomes are related to finding and evaluating the quality of references, editing and formatting text in LAT...
Article
Full-text available
Surmounting terrain elevations, such as terraces, is useful to increase the reach of mobile robots operating in disaster areas, construction sites, and natural environments. This paper proposes an autonomous climbing maneuver for tracked mobile manipulators with the help of the onboard arm. The solution includes a fast 3-D scan processing method to...
Conference Paper
Full-text available
Elevation maps offer a compact 2½ dimensional model of terrain surface for navigation in field mobile robotics. However, building these maps from 3D raw point clouds containing overhangs, such as tree canopy or tunnels, can produce useless results. This paper proposes a simple processing of a ground-based point cloud that identifies and removes ove...
Article
Full-text available
The paper reports on a practical backward motion strategy for a vehicle pushing several passive trailers with any combination of on- and off-axle hitches. The last trailer is defined as a virtual tractor that can be guided along paths of varying curvature like a single non-holonomic vehicle. Then, kinematic relationships are proposed to translate t...
Conference Paper
Exploiting the huge amount of real time range data provided by new multi-beam three-dimensional (3D) laser scanners is challenging for vehicle and mobile robot applications. The Coarse Binary Cube (CBC) method was proposed to achieve fast and accurate scene registration by maximizing the number of coincident cubes between a pair of scans. The aim o...
Conference Paper
Full-text available
Mobile robot navigation through natural terrains is a challenging issue with applications such as planetary exploration or search and rescue. This paper proposes navigability assessment of natural terrains scanned from ground-based 3D laser rangefinders. A continuous model of the terrain is obtained as a fuzzy elevation map (FEM). Based on this mod...
Conference Paper
Full-text available
This paper pursues speeding up 3D point cloud matching, which is crucial for mobile robotics. In previous work, we devised the Coarse Binary Cubes (CBC) method for fast and accurate registration of 3D scenes based on an integer objective function. Instead of point distance calculations, the method optimizes the number of coincident binary cubes bet...
Conference Paper
Full-text available
Hoy en día, la elaboración y presentación de informes de investigación resulta indispensable para muchos profesionales de la ingeniería. En este artículo se describe una asignatura de máster universitario cuyo principal objetivo es proporcionar los conocimientos necesarios para poder escribir y exponer resultados de investigación en ingeniería meca...
Article
Full-text available
McPherson suspension modelling poses a challenging problem due to its nonlinear asymmetric behaviour. The paper proposes a planar quarter-car analytical model that not only considers vertical motion of the sprung mass (chassis) but also: (i) rotation and translation for the unsprung mass (wheel assembly), (ii) wheel mass and its inertia moment abou...
Article
Full-text available
Resumen El propósito de este artículo es efectuar una revisión del estado del conocimiento en el modelado y control de los sistemas de suspensión activa y semiactiva. Se analizan las principales características de los diferentes tipos de sistemas de suspensión: pasiva, activa y semiactiva. Respecto al modelado y simulación de los sistemas de suspen...
Article
Full-text available
This paper analyzes the effect of towing a single-axle trailer on static tip-over stability for field mobile robots on slopes. For this purpose, this study defines altered supporting polygons (ASP) for both tractor and trailer. These ASPs are based on a force-torque static equilibrium analysis that reshapes the corresponding ground contact supporti...
Article
Full-text available
Driving vehicles with one or more passive trailers has difficulties in both forward and backward motion due to inter-unit collisions, jackknife, and lack of visibility. Consequently, advanced driver assistance systems (ADAS) for multi-trailer combinations can be beneficial to accident avoidance as well as to driver comfort. The ADAS proposed in thi...
Conference Paper
Full-text available
Active suspension systems are crucial to improve vehicle performance and passenger comfort. Fuzzy logic control can cope with suspension system nonlinearities using heuristic knowledge rules, but tuning the control parameters is not straightforward. In this paper, we propose tuning fuzzy scal-ing factors for active suspension control by particle sw...
Conference Paper
Full-text available
Drivers of vehicles with one or several passive trailers, like truck-and-trailer or articulated luggage carriers, have difficulties in backward maneuvers due to jackknife and lack of visibility. Advanced driver assistance systems (ADAS) can be helpful to improve both safety and driver comfort in these complex operations. In this paper, we propose a...
Article
Full-text available
Scene registration of a pair of three-dimensional (3D) range images is a 6D optimization problem usually required in mobile robotics. This problem is different from object registration, since all scan directions and depths may contain relevant data, and because farther regions are sampled with lower densities. The paper proposes an efficient scene...
Conference Paper
Full-text available
This paper proposes a systematic and comprehen-sive development of a nonlinear two-dimensional mathematical quarter-car model of the McPherson suspension. The model considers not only vertical motion of the sprung mass (chassis) but also rotation and translation for the unsprung mass (wheel assembly). Furthermore, this model includes the wheel mass...
Article
Full-text available
Alacrane is a hydraulic mobile manipulator for search and rescue in disaster areas and natural environments, where surmounting elevations such as rubble mounds and terraces is usually required. The paper describes the autonomous terrace climbing maneuver of this mobile robot with the help of its powerful arm. During this operation, the arm is used...
Conference Paper
Full-text available
This paper reports on simplification of 3D point clouds for terrain maps. This is an important issue for mobile robot navigation and path planning in natural environments. Points cloud maps obtained from onboard 3D range-finders can provide a large amount of data which is not uniformly distributed and that can be incomplete due to occluded and out-...
Conference Paper
Full-text available
Many applications demand acquiring dense, wide ranging, accurate 3D data with low-cost, lightweight, and low power demanding sensors. This paper describes a new compact 3D laser scanner, based on pitching a commercial 2D rangefinder. The design of this mechatronic system accomplishes the following specifications: i) the optical center of the scanne...
Article
Full-text available
The paper proposes lab work and student competitions based on the LEGO NXT Mindstorms kits and standard LabVIEW. The goal of this combination is to stimulate design and experimentation with real hardware and representative software in courses where mobile robotics is adopted as a motivating platform to introduce mechatronics competencies. Basic Lab...
Conference Paper
Full-text available
Autonomous mobile robots have limited energy sources. This work studies power consumption of the locomotion system of wheeled skid-steer vehicles on hard horizontal terrain at walking speeds. This issue is very important for this kind of vehicles due to relevant power losses associated to dynamic friction during turnings. The paper adopts a kinemat...
Article
Full-text available
Three-dimensional laser range-finders are increasingly being incorporated into applications, such as mobile robotics, that require real-time registration of scene data. However, the computational costs of adaptive range-dependent data selection and point cloud matching grow significantly with the number of points. Therefore, fast range-independent...
Article
Full-text available
The paper reports on mobile robot motion estimation based on matching points from successive two-dimensional (2D) laser scans. This ego-motion approach is well suited to unstructured and dynamic environments because it directly uses raw laser points rather than ex-tracted features. We have analyzed the application of two methods that are very diffe...
Conference Paper
Full-text available
This paper presents a simplification of the Lu and Milios work [1] for globally consistent Simultaneous Localization And Mapping (SLAM) with two-dimensional (2D) scan registration. The proposed method is based on global two-step (orientation-position) pose estimation. This approach reduces the computational effort since it represents a closed-form...
Conference Paper
Outdoor scene registration of two 3D range scans, as usually required by field robotics, is very different from object and indoor registration, since all scan directions and depths may contain relevant data. This is not considered by 3D matching methods devised for computer graphics and reverse engineering. In this paper, we propose a specialized r...
Conference Paper
Full-text available
The paper reports on motion control for a non-holonomic vehicle pushing several passive trailers. To avoid inter-unit collisions, tractor steering limitations were successfully applied during forward motion in our previous work. Here, this approach is extended to the case of backward motion for off-axle trailers. To this end, the last trailer is co...
Article
Full-text available
Due to its simplicity and efficiency, the pure-pursuit path tracking method has been widely employed for planned navigation of nonholonomic ground vehicles. In this paper, we investigate the application of this technique for reactive tracking of paths that are implicitly defined by perceived environmental features. Goal points are obtained through...
Article
Full-text available
Power consumption is a key element in outdoor mobile robot autonomy. This issue is very relevant in skid-steer tracked vehicles on account of their large ground contact area. In this paper, the power losses due to dynamic friction have been modeled from two different perspectives: 1) the power drawn by the rigid terrain and 2) the power supplied by...
Conference Paper
Full-text available
This paper reports on the experience of the 2008 international summer school on mechatronics, jointly organized by the University of M'alaga (Spain) and the Technical University of Dresden (Germany). An important part of the hands-on practice and two student competitions have been based on the LEGO Mindstorms NXT Set. To stimulate lab work with rep...
Article
Full-text available
This paper reports on the study of the Center of Gravity (COG) for the ALACRANE mobile robot, which consists on a hydraulic tracked vehicle with a customized heavy manipulator. This analysis is necessary because the robot has to navigate on inclined terrains, where tip-over problems are present. During navigation, only three actuators are available...
Article
Full-text available
Motion control of articulated vehicles composed of a nonholonomic tractor and several passive trailers is a difficult underactuated problem. This paper proposes the application of steering limitations to the tractor to avoid inter unit collision during forward motion. This method can be used for systems that combine any type of on-axle and off-axle...
Conference Paper
Full-text available
This work aims at improving real-time motion control and dead-reckoning of wheeled skid-steer vehicles by considering the effects of slippage, but without introducing the complexity of dynamics computations in the loop. This traction scheme is found both in many off-the-shelf mobile robots due to its mechanical simplicity and in outdoor application...