T o d a y ’s control systems have their roots, to a great extent, in the speed control of driving engines (prime movers) and particularly in the speed control of water turbines. The first turbines with automatic speed control appeared sometime in the mid-19th century. In this column, I discuss the history of water-turbine control systems, noting the older inventions and techniques that made pos...

The development of on line model-based fault detection systems in machinery improves the operational reliability of industrial systems and reduces the operational and maintenance costs. In this direction, this paper presents the use of modelling information to determine changes in characteristics from measured data for the fault detection purpose of hydraulic driven machines as well as for the ...

The framework of this study is computerassisted control of hydraulic actuated mobile machinery, such as mining manipulators and earth moving equipment. The design of both methods is treated and experimental results are presented. Several criteria for comparison are detailed to assist in a rational decision making process. In this paper, two different approaches have been taken in an attempt to ...

According to problems such as low accuracy, high error in the shearer body position, this paper proposes a new computational method combining with the information of shearer, scraper conveyor and hydraulic support in order to realize three machine positioning. Using the sensor information and staticdynamic fusion, this paper solves positioning problem of the three-dimensional in the process of ...

A range of continental-scale soil datasets exists in Europe with different spatial representation and based on different principles. We developed comprehensive pedotransfer functions (PTFs) for applications principally on spatial datasets with continental coverage. The PTF development included the prediction of soil water retention at various matric potentials and prediction of parameters to ch...

Rotating machinery is one of the most typical types of mechanical equipment and plays a significant role in industrial applications. Condition monitoring and fault diagnosis of rotating machinery has gained wide attention for its significance in preventing catastrophic accident and guaranteeing sufficient maintenance. With the development of science and technology, fault diagnosis methods based...

To predict the resonance characteristics of hydraulic machinery, it is necessary to accurately calculate natural modes runners in operating environment. However, existing research, boundary conditions numerical modal analysis runner were not unified. In this paper, a prototype Francis pump turbine was carried out using acoustic–structure coupling method. The results three different constraints ...

The results of numerical and experimental research conducted in the Laboratory for Hydraulic Machinery Construction Peter Great St. Petersburg Polytechnic University are presented. is aimed at studying effects an impeller radial clearance rim on energy characteristic low-pressure axial pumps specific speed ns≈600. It shown that these design features a flow duct have significant stage parameters...