This paper presents the development of a force control loop in a teleoperation system with master and slave robotic devices. The force control based on current control loop has been applied to a teleoperation open platform consisting on electric master device, hydraulic slave robot and equipment for data acquisition and control programming. This force control loop is applied in each master join...

Within a national research and development program funded by the german ministry of education and research (BMBF) new fly by wire flight control system has been developed and is in the process of certification according to JAR 25. Technology readiness was demonstrated for those technologies which are potential candidates for a new aircraft. New equipment was developed and demonstrated in severa...

The number of dismantling sites for buildings has been rapidly increased and these processes are very dangerous. So many research papers have been published addressing the development of a remote controller for the dismantling equipments. In this paper, a novel concept of applying tele-operated device is proposed for the remote control of excavator-like dismantling equipment. As a tele-operated...

Shield is a typical mechanical, electrical, hydraulic integration of equipment. Its faults species are complex and diverse. To prevent because machine failure causes economic losses and casualties by shield, this article will introduces rough set theory to the subway shield machine fault diagnosis, propose a method which is based on rough set theory combined with neural network of Metro shield ...

Lessening the leakage of surface water can reduce the waste of water resources and ground water pollution. To solve the problem that Mengxi River could not store water enduringly, geology investigation, theoretical analysis, experiment research, and numerical simulation analysis were carried out. Firstly, the seepage mathematical model was established based on unsaturated seepage theory; second...

Water hammer may occur upon rapidly closing a water pipe valve. Oscillating pressure waves generated in the system cause significant equipment damage, including joint leaks and even rupture. Similar phenomena can when starting stopping pumps. As various situations potentially damaging waves, related are grouped as “hydraulic transients.” The not limited to pipes any liquid, condensed gases such...

In this study, we propose the maintenance task establishment method based on fault simulation models. Maintenance task allocation model based on Multi-Agent System and High Level Architecture is presented to manage and coordinate the dynamic task allocating process of multi operators and it can make the intelligent decision for their collaborative maintenance operation at each step. Object info...

To ensure the production/output and customer satisfaction in mining sector the estimation of Remaining Useful Life of mining machineries is a prime. In this paper we used the reliability analysis in order to estimate an optimal mining equipment repair/replacement policy by estimating their remaining useful life. The proportional hazard model was used in reliability analysis to be realistic and ...

Seventy to eighty five percent of failures and wear problems in lubricated machines are caused by oil contamination. Contaminants shorten the life of all machines, especially those with fine finishes and clearances operating at high speeds and temperatures. Examples are rolling and sliding bearings, gears, vane and piston hydraulic pumps, Maintaining clean oil provides the benefits listed in Ta...

Trees face the dilemma that achieving high plant productivity is accompanied by a risk of drought-induced hydraulic failure due to a trade-off in the trees' vascular system between hydraulic efficiency and safety. By investigating the xylem anatomy of branches and coarse roots, and measuring branch axial hydraulic conductivity and vulnerability to cavitation in 4-year-old field-grown aspen plan...