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Most of the electronic measurements laboratories need signal generators capable to generate several types of signals with different shapes, frequencies and amplitudes. Unfortunately the more versatile such a signal generator will be the higher its cost will be. The alternative is the PC based instrumentation. There are classical tools, as Lab VIEW, but sometimes a better approach is to develop a PC...
Due to their high reliability and low cost, network control systems are becoming key players in the future of control systems. However, their usage requires handling issues like time delays and information loss. This paper presents a method for dealing with these issues through a control structure based on the usage of a proportional-derivative type adaptive compensator. Finally the experimental case...
Our research was focused on a Product Life Management (PLM) system implementation in a digital manufacturing environment. We simulated in our laboratory the perspectives to put into operation a PLM system, to help the decision process in a CAD/CAM/CAE developing process. We analyzed different PLM systems and the measured parameters are: number of the objects manipulated; the price of server installation...
The design of machine tools activity is an area with hundreds of years old. With the development of CAD/CAE systems, the engineers' work was greatly simplified. However, CAD/CAE systems are unable to overcome a critical threshold, thereby leaving the designer with many problems to be solved. Artificial intelligence field is also very exciting to develop this area. This paper presents a first attempt...
A framework of three attributes for video surveillance systems is underlined: availability, accessibility and authenticity. Under this framework, a scenario in which surveillance cameras can be accessed by remote devices, such as mobile phones, PDAs, over IP is addressed. Some security drawbacks of an off-the-shelf product are depicted and a new solution is proposed which uses cryptographic authentication...
Mobile robots are a very dynamic part of the robotics domain. Their navigation requires solutions for: establishment of the current position, motion planning and avoidance of obstacles. The paper describes a solution for mobile robot navigation with obstacle avoidance capability based on the X80 robot from Dr. Robot. The map and the trajectory are computed on a PC which will wirelessly control the...
Implementing cryptography on devices with low computational power is a necessity as they became involved in communications over public networks. Even more, these devices became ubiquitous and are used in a large area of applications, from home-office systems to industrial control systems. We deal with the design and implementation of a cryptographic protocol that can be used to assure the authenticity...
Sawing with circular saw is not possible to realize with optimal cutting parameters because the continuing variation of contact lengths of wing chord between cutting tool and the material. On coming in and coming out of teeth's in material appear the possibility to break off this teeth's, but in the middle of cutting this possibility is decrease because are much more teeth's in contact. So the optimal...
Important advances have been made in the last period in the robotic domain. Mobile robots are in an accentuated development. The navigation of the mobile robots requires solutions for the following problems: the establishment of the current position, the motion planning and the avoidance of obstacles. This paper approaches the problem of indoor navigation of a wheeled mobile robot. The X80 robot from...
Mobile phones are ubiquitous devices that begin to be involved in plenty of tasks in addition to their standard voice function. Using mobile phones to access remote information over TCP/IP is a common demand. However, when travel across networks, information is exposed to several security risks, and the use of cryptographic security unavoidable. Mobile phones still have low computational power and...
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