Senior management model applied to micro, small and medium business

Siendo Colombia un país cuya economía se soporta en empresas de pequeña escala, donde las MIPYMES en conjunto representando el 90%, sector que genera el 73% de empleos y el 53% de la producción bruta en los diferentes sectores industriales, comerciales y de los servicios. No obstante de la importancia de este sector en la economía, muchas de ellas enfrentan una problemática que interrumpen su crecimiento y desarrollo. Este trabajo de investigación tiene como finalidad estructurar un modelo gerencial, el cual recoge aspectos importantes y valiosos a tener en cuenta por los dueños, gerentes y administradores; producto de identificar las debilidades que han impedido su crecimiento y desarrollo de manera efectiva en el campo empresarial moderno. Por lo anterior se analizó como debilidades más sentidas el desconocimiento y aplicación de teorías actuales en materia gerencial, que pueden actuar en miras de un mayor crecimiento y diversificación de sus ofertas de bienes y servicios, en este caso en el campo de los cosméticos; Soportado en los conocimientos adquiridos durante la Especialización en Alta Gerencia, se define desde un punto de vista particular pero responsable, los temas que deberían ser revisados por este tipo de empresas, para lograr la mejor comprensión y aplicación de temas tan importantes como Pensamiento Complejo, Análisis y Estudios de Competencias, Planeamiento Estratégico y Financiero, Gerencia de Mercado y Talento Humano.Colombia is a country whose economy is supported in small scale enterprises, where MIPYMES altogether representing 90%, sector that generates 73% of jobs and 53% of gross in the various sectors of industrial, commercial production and services. But the importance of this sector in the economy, many of them face problems that disrupt their growth and development. This research paper aims to structure a management model, which collects valuable and important aspects to be considered by owners and managers; product identify the weaknesses that have prevented its growth and development effectively in the modern business field. Therefore analyzed as most pressing weaknesses lack of knowledge and application of current theories in the management field, which may act in view of further growth and diversification of its offers of goods and services, in this case in the field of cosmetics; Supported the knowledge gained during the specialization in senior management, defined from a point of view responsible, but particular issues that should be reviewed by this kind of companies, to achieve better understanding and application of such important topics as complex thought, analysis and studies of competencies, strategic planning and financial, market and human resource managemen

FASTKIT: A Mobile Cable-Driven Parallel Robot for Logistics

International audienceThe subject of this paper is about the design, modeling, control and performance evaluation of a low cost and versatile robotic solution for logistics. The robot under study, named FASTKIT, is obtained from a combination of mobile robots and a Cable-Driven Parallel Robot (CDPR). FASTKIT addresses an industrial need for fast picking and kitting operations in existing storage facilities while being easy to install, keeping existing infrastructures and covering large areas. The FASTKIT prototype consists of two mobile bases that carry the exit points of the CDPR. The system can navigate autonomously to the area of interest. Once the desired position is attained, the system deploys the CDPR in such a way that its workspace corresponds to the current task specification. The system calculates the required mobile base position from the desired workspace and ensures the controllability of the platform during the deployment. Once the system is successfully deployed, the set of stabilizers are used to ensure the prototype structural stability. Then the prototype gripper is moved accurately by the CDPR at high velocity over a large area by controlling the cable tension

Cable-driven parallel robot for curtain wall module installation

A cable-driven parallel robot (CDPR) was developed for the installation of curtain wall modules (CWM). The research addressed the question of whether the CDPR was capable installing CWMs with sufficient accuracy while being competitive compared to conventional manual methods. In order to develop and test such a system, a conceptual framework that consisted of three sub-systems was defined. The tests, carried out in two close-to-real demonstration buildings, revealed an absolute accuracy of the CWM installation of 4 to 23 mm. The working time for installing a CWM was reduced to 0.51 h. The results also show that the system is competitive for a workspace greater than 96 m2 compared to conventional manual methods. However, improvements such as reducing the hours for setting up the CDPR on the one hand and achieving a faster and more robust MEE on the other hand will be still necessary in the future.This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 73251

Computing cross-sections of the workspace of cable-driven parallel robots with 6 sagging cables

International audienceFinding the workspace of cable driven parallel robots (CDPR) with sagging cables (i.e. elastic and deformable cables) is a problem that has never been fully addressed in the literature as this is a complex issue: the inverse kinematics may have multiple solutions and the equations that describe the problem are non-linear and non algebraic. We address here the problem of determining an approximation of the border of horizontal cross-sections of the workspace for CDPR with 6 cables. We present an algorithm that give an outline of this border but also rises several theoretical issues. We then propose another algorithm that allow to determine a polygonal approximation of the workspace border induced by a specific constraint. All these algorithms are illustrated on a very large CDPR

Determination of a Dynamic Feasible Workspace for Cable-Driven Parallel Robots

International audienceThe dynamic equilibrium of the moving platform of a cable-driven parallel robot can be investigated by means of the Dynamic Feasible Workspace (DFW), which is the set of dynamic feasible moving platform poses. A pose is said to be dynamic feasible if a prescribed set of moving platform accelerations is feasible, with cable tensions lying in between given lower and upper bounds. This paper introduces an extended version of the DFW with respect to the one usually considered in the literature. Indeed, the improved DFW introduced in this paper takes into account: (i) The inertia of the moving platform; (ii) The external wrenches applied on the moving platform and (iii) The centrifugal and the Coriolis forces corresponding to a constant moving platform twist. Finally, the static, wrench-feasible, dynamic and improved dynamic workspaces of a spatial cable-suspended parallel robot are plotted in order to compare their sizes

Analysis of the Wrench-Closure Workspace of Planar Parallel Cable-Driven Mechanisms

International audienceThe mobile platform of a parallel cable-driven mechanism is connected in parallel to a base by lightweight links, such as cables. Since the cables can only work in tension, the set of poses of the mobile platform for which the cables can balance any external wrench, i.e., for which the platform of the mechanism is fully constrained, is often limited or even nonexistent. Thus, the study and determination of this set of poses, called the wrench-closure workspace (WCW), is an important issue for parallel cable-driven mechanisms. In this paper, the case of planar parallel cable-driven mechanisms is addressed. Theorems that characterize the poses of the WCW are proposed. Then, these theorems are used to disclose the parts of the reachable workspace which belong to the WCW. Finally, an efficient algorithm that determines the constant-orientation cross-sections of these parts is introduced

A Practical Approach for the Hybrid Joint-Space Control of Overconstrained Cable-Driven Parallel Robots

Hybrid joint-space control of overconstrained cable-driven parallel robots requires regulating the length of as many cables as the degrees of freedom of the end-effector, and controlling the tension of the remaining ones. Previous studies showed how to choose which cables to length control, and which ones to tension control, according to minimum tension error propagation techniques. The sets of tension-controlled and length-controlled cables achieving minimum tension error propagation typically vary throughout the workspace, which is an undesirable outcome. This paper aims to achieve practicality in hybrid joint-space control, by investigating which cables to be tension- and length-controlled in the whole workspace, without needing to change such sets. The HRPCable robot at LIRMM is analyzed for this application, and experiments are carried out on it

Determination of the wrench-closure workspace of 6-dof parallel cable-driven mechanisms

The wrench-closure workspace of parallel cable-driven mechanisms is the set of poses of their mobile platform for which the cables can balance any external wrench. The determination of this workspace is an important issue since the cables can only pull and not push on the mobile platform. This paper deals with the wrench-closure workspace of six-degrees-of-freedom (DOF) parallel mechanisms driven by m cables, m ≥ 7. The boundary of the constant-orientation cross sections of the wrench-closure workspace is shown to consist of parts of cubic surfaces and an efficient method that determine this workspace by delineating its boundary is proposed

Workspace and Interference Analysis of Cable-Driven Parallel Robots with an Unlimited Rotation Axis

A drawback of many cable-driven parallel robots is a relatively small orientation workspace. In this paper, two design variants for cable-driven parallel robots with nine and twelve cables are proposed that allow for large rotations. It is shown that the platform can perform a 360∘ rotation while maintaining positive tension in all cables and without collisions amongst the cables. Furthermore, workspace studies of the total orientation workspace are provided. Surprisingly, this family of cable robot is capable to perform an unlimited rotation within a translational workspace of reasonable size. Finally, the efficiency and computation time of force distribution algorithms is compared for cable robots having twelve cables

Workspace and Interference Analysis of Cable-Driven Parallel Robots with an Unlimited Rotation Axis

A drawback of many cable-driven parallel robots is a relatively small orientation workspace. In this paper, two design variants for cable-driven parallel robots with nine and twelve cables are proposed that allow for large rotations. It is shown that the platform can perform a 360∘ rotation while maintaining positive tension in all cables and without collisions amongst the cables. Furthermore, workspace studies of the total orientation workspace are provided. Surprisingly, this family of cable robot is capable to perform an unlimited rotation within a translational workspace of reasonable size. Finally, the efficiency and computation time of force distribution algorithms is compared for cable robots having twelve cables