Experimental Studies on the Reactive Thrust of the Mobile Robot of Arbitrary Orientation

The problem of creating mobile robots of arbitrary orientation in the technological space is to ensure reliable retention of robots on the surface of any orientation. Therefore, well-known experimental studies are mainly devoted to the creation of systems for coupling the robot to the surface along which it moves. The purpose of this study is to create a device for compensating the gravitational load of a mobile robot. The article contains the results of experimental testing of a fundamentally new approach to counteract the gravitational load of a mobile robot, namely, the expediency of equipping the robot with a source of reactive thrust of a non-chemical origin. A pneumatic generator of aerodynamic lift is proposed as such a source. Such a force partially compensates or completely overcomes the gravitational load, while not allowing the transformation of a mobile robot into an aircraft. The specified condition is necessary to perform contact power technological operations in the maintenance of various industrial facilities. In other words, the thrust force should not exceed the adhesion forces of the mobile robot to the displacement surface. As a research method, a full factorial experiment of the operation of a jet thrust generator was used, which is a new way to increase the reliability of holding the robot on an arbitrary surface. The article describes the methodology and description of the full factorial experiment with varying independent factors at two extreme levels. As a result, an experimental solution to the problem of finding the quasi-optimal values of the aerodynamic lifting force depending on the parameters of the jet thrust generator is obtained. As a result, the combination of a new robot design with the results of experimental studies confirms the feasibility of using a pneumatic jet thrust generator as a means of increasing the reliability of holding mobile robots on an arbitrary orientation surface in the technological space

X-ray structural investigations of the ferroelastic phase transition in halogenides of univalent mercury

Crystals of univalent mercury halogenides (UMH) Hg_Cl_2, Hg_2Br_2 and solid solutions on their base are considered in the paper aiming at the detection and complex, in the grand manner, X-ray structural, spectroscopic and thermal physical investigations of the ferroelastic phase transition in UMH and solid solutions. The application of the results obtained to the description of the PT mechanism in frameworks of Landau's theory and the soft water mechanism is also the aim of the paper. As a result the form of a thermodynamic potential has been suggested. Values of its coefficients have been obtained on the base of experimental data. The fact of the transition in the vicinity of a tricritical point (TP) has been substantiated. The symmetry of the low temperature phase of UMH crystals and solid solutions has been determined. The model of the non-own phase transition in the vicinity of TP has been suggested on this base. The representation about fundamental problems of solid-state physics and structural phase transitions has been extended. The paper results may find their field of application in the creation of optical, acoustooptical devicesAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Bryoflora of steppe zone of east-european flatland and ciscaucasia (taxonomy, ecobiocenotic peculiarities, genesis, anthropogenic transformations and protection)

The investigation is concerned with steppe zone Bryophyta. The researchers have determined the species makeup and revealed the structural peculiarities of the bryoflora of the East-European flatland and Ciscaucasia. The investigators have pioneered in substantiating the hypothesis about the five-phase history of formation of the said bryoflora, formulating the concept of identification of the types of the Bryophyta vital strategies and analysing the anthropogenic transformations of the bryoflora and predicting the trends of development thereof. The obtained investigation results have been included in the monographs on the Bryophyta and vegetable cover in the Ukraine and training courses at the institutes of higher education and secondary schools. Ecological monitoring of the steppe zone biosphere has resulted in the setting-up of the botanical sanctuaries to allow protection of rare plant speciesAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

BIODEGRADABLE LUBRICANT FOR RAILWAY TRANSPORT

Boron-containing lubricant for rail-curve lubrication is developed. Its effectiveness was proved by series of experiments carried out on different types of friction machines. The mechanism of antiscoring effect of boron-containing additives was analyzed in terms of physical adsorption

Increasing the Tracks Efficiency by Using Energy-Saving Oils in Transmission and Engine

A method for improving the efficiency of construction machinery and vehicles by using the energy-saving engine and transmission oils is proposed. Developed additives give to oils the energy-saving properties. The results of oils tests in engines and transmissions of trucks are given. It is shown the modified oils using reduces the fuel by 7.2% - 8.3%, the efficiency of the transmission increases to 12%

Increasing the Tracks Efficiency by Using Energy-Saving Oils in Transmission and Engine

A method for improving the efficiency of construction machinery and vehicles by using the energy-saving engine and transmission oils is proposed. Developed additives give to oils the energy-saving properties. The results of oils tests in engines and transmissions of trucks are given. It is shown the modified oils using reduces the fuel by 7.2% - 8.3%, the efficiency of the transmission increases to 12%

Justification of the choice of the type of forage harvester for farms

The results of tests of feed-harvesting combines of domestic and foreign manufacturers for the last ten years are presented. Recommendations on the choice of the studied equipment are given