LQR Control for Five-Link Pendubot

Pendubot is a popular inverted pendulum model in control engineering. Usually, two-link pendubot is used due to its simplicity in mechanical structure and its nonlinear characteristic. The challenge of control can be increased by adding more links to system. In this paper, balancing five-link pendubot at TOP position and pulse-tracking this model are tested through simulation. The control algorithm LQR is in survey in this research. The simulation shows that system is stabilized well at working point and it is also control well in tracking a pulse trajectory.

Management of Processing Technology on Computerised Numerically Controlled Centres from Programming and Simulation to Operation

The paper presents the peculiarities of the management of the processing technology on computerised numerically controlled centres, from the source code G to the high level code. In order to do a skilled job, the programmer and / or the operator from the CNC centres will apply an operational management through which all the programming and operating instructions for making a part will reproduce the practical actions that a worker classically does. The paper presents the 10 stages of computer-aided processing. The applied research showed that it is more and more necessary to shorten the programming time to make a part by switching from G code to high level code as shown intuitively in the Sinu Train application. At the same time, the management of the processing technology on the CNC centres imposes more and more, through the new working conditions given by the pandemic, work from home (home-work) and programming from home. Therefore, the online simulation of the program created is the new method of "cold testing" of a processing process. Finally, by operating on CNC centres, the compliance with the quality requirements given by the total quality management will always be pursued.

Friction Forces in Numerical Simulations of Kinematical Joints of Mechanical Systems

The paper presents a way of estimation, by simulation, of friction forces that occur in the kinematical joints of mechanical systems. Friction forces between planar surfaces, in revolute joints, and in spherical joints are computed, and the results are compared with the values achieved from simulation. SolidWorks software is used for the simulation process.

Managerial Perspective on Ethical Culture in Organizations and Institutions

Ethical performance aims to analyze the different dimensions of an ethical performance framework in a global context, then illustrate how public or private organizations measure ethical performance. In order to achieve this goal, a number of performance-enhancing factors are needed, which however are many, complex, interrelated, and sometimes difficult to measure. Trends show an increase in performance regimes, audit, and inspection for public agencies along with numerous attempts to measure ethical performance.

Design of the Cemented Doublet – Software Application

From optical point of view, an imaging application includes the sensor (CCD or CMOS) and the objective. The simplest objective consists of a cemented doublet. The paper proposes a design algorithm of the doublet and describes a software application based on this algorithm. The results provided by the original software are validated by means of a professional application in optical system analysis.

Becoming Entrepreneur in Romania: the Role of Entrepreneurship Education

The present study (based on the analysis of 26 interviews) aims to identify the impact of formal entrepreneurship education on the professional life of entrepreneurs and ways of improving entrepreneurship education in secondary, high school and higher education, the findings showing that formal entrepreneurship education has little influence on becoming an entrepreneur.

Designing and Testing a Mini Robot for Tracking a Welding Technological Path

In the welding processes of large dimension subassemblies, an advanced mechanism is necessary in order the welding stitch not be interrupted during the change of the operator’s position. A tracking model has been designed and tested, for a simple welding path using a mini robot, which can be controlled via mobile phone.