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In large-drive applications, load-commutated inverters (LCIs) are one of the most used technologies mainly because of their excellent reliability records. However, LCIs are known to generate interharmonics. They can interact with the mechanical system at torsional natural frequencies of the rotating train, on both the inverter and rectifier sides in weakly connected power systems, such as offshore...
This paper analyses the principle of synchronous belt fatigue life testing system, designs and realizes the control system with advanced controlling and detecting technology. We developed the mechanical system, Control System and windows-based software system for the Synchronous Belt Fatigue Life Testing System which working in Liaoyang mechanical belt factory very well.
The failure of the mechanical products is not only accidental, but also gradualness. A very important part, in the course of maintenance and support of the mechanical system, is to find out ldquothe sources of failurerdquo which cause the damage of the system components, in order to take the pertinence preventive measures in time. This paper applies the reliability design and reliability analysis...
This paper presents the design, analysis and comparison of the conventional PI-control to two state space controllers for speed control of drive systems with elastically coupled loads. A state space controller of fourth order which considers only the mechanical system and a state space controller of fifth order which takes an approximation of the electrical system into account are analyzed. Thereby,...
A simulation model of the mechanical transmission of a hybrid electric vehiclepsilas four-wheel drive system is developed using the Energetic Macroscopic Representation (EMR). This mechanical system is composed of two open differentials and a clutch to provide the limited slip coupling, which links the differentials. The modelling of a clutch in a powertrain transmission is a sensitive point because...
A spectral analysis of the electrical power draw of the two 5.2 MW motors driving a large grinding mill is performed to determine whether they are the source of a severe 55.8 Hz vibration. The applicable electrical and mechanical data was measured during October 2006 and recorded with a sample rate of 5 kHz over a few minutes. It is shown that the motors do not supply the mechanical system with any...
In a recent research, the authors of this paper have proposed a non-linear model to simulate vibration in the reactor core cooling system. The model describes the industrial system used in the Egyptian 2nd research reactor. It has overcome the shortcoming of the conventional model, and proved accurate simulation of the reactor core cooling mechanical system. Based on this model, this paper presents...
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