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After the success of Pehuensat I, the nanosatellite launched by National University of Comahue (UNCO), a new project has emerged and with it new challenges. The Pehuensat II, successor to the former, will have a much more ambitious mission including the transmission of satellite imagery which require a higher transmission rate and therefore will require an increase in the frequency band. Because of...
Certain multimedia productions yield interactive tools that help understand complex concepts. They explain in a short, simple and effective way, the history, applications and functioning of complex technical topics. This paper aims to describe a virtual learning environment named MIDA and LEARNITRON. The first, has been designed to train students of Engineering careers in concepts with high abstraction...
The proposal of this job is to investigate about information exchange techniques between mobile devices and robots through wireless environments. Programming techniques and architectural skills have been used to build a mobile software application capable of supporting unidirectional communication through a Wireless Personal Area Network (WPAN) from a cell phone to a multipurpose Robot.
In this paper the problem of trajectory tracking considering that the values of the control actions do not exceed the maximum allowable is focused and the zero convergence of tracking errors is demonstrated. A new control law based on the numerical approximation of the mobile robot model is developed. Experimental results are presented and discussed, demonstrating the good performance of the controller.
Power factor correctors with dual-boost topology (PFC-DBs) are very efficient. They have less conduction losses than those using a conventional boost (PFC-BC) topology. In order to control PFC-DBs input voltage and current measurements are usually needed, but measuring these signals is difficult and relatively expensive when the controller is implemented with commercial integrated circuits. This is...
In this article, an alternative median filtering approach for acoustic side-scan sonar signals is presented. These acoustic signals are often degraded by a speckle noise which is inherent to the sonar, and the median filter is an effective tool to reduce it. However, its use has been resisted because it is time-consuming. Since the number of available large images is growing, more efficient smoothing...
In this paper we propose a wide-angle lens system (with a field of view of 360° × 183°) for the observation of multiple objects in the scene. For the development of this system: A) We calibrate a commercial fisheye camera and show that the imaging process can be adjusted with the Unified Imaging Model. B) We use this model to correct the distortions caused by the fisheye lens and simulate images acquired...
Advances in research on humanoid robots in recent years have brought a decrease in manufacturing costs due to design improvements and increased applications as assistants in certain tasks. Likewise, the miniaturization of electronic components and the proper use of simulation platforms used to evaluate the performance before construction permit dissemination and use of robots in most areas. The objective...
Transient responses are a common side-effect intrinsic to digital filters, corrupting the output signal. In order to minimize this issue, this paper proposes a new method for transient suppression of low-pass, high-pass, band-pass and band-stop IIR filters. The suggested algorithm iteratively adjusts the inner state of the filter until the output signal is considered to have reached its steady state.
This article describes the development of a path generating system for the movement of a remote commanded robotic mobile, through machine vision techniques and fuzzy decision systems. Using a Kinect sensor, the system captures the motion area of the mobile and using image processing techniques, obstacles are segmented and a fuzzy clustering algorithm is implemented to define the possible paths to...
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