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- W945335068 abstract "The relative base – air-gap – absolute base system (planar stepping motor) is the main element of the precise coordinate positioning systems of the specialized devices. Possible fields of application of the precise coordinate systems with the planar stepping motor [4, 7]: manipulators, machine tools, measuring machines, assembly operations in microelectronics and instrument engineering, surface mounting elements and units assembly, laser technological complexes. The basic direction of the development of the structure of the aerostatic relative bases with electromagnetic drive is to look for the solutions characterized by the higher stiffness. The stiffness determines a capacity of the relative base to counteract the working load (payload). The action of the payloads causes a change of the height of the air layer h (air-gap) between the absolute base and the relative base. The determination of the range of the value of the air-gap h, for which the stiffness is constant and maximum, requires working out of the particular model of the system [1] and computer simulation. The computer simulation results enable the choice of the required alternative structure of the aerostatic relative bases with electromagnetic drive in particular devices. The planar aerostatic two-coordinate relative base is a tribology system, described by the equations resulting from the following laws: – the law of conservation of momentum (the Navier–Stokes – equation of motion), – the law of conservation of mass (equation of continuity), – the law of conservation of energy. In modelling of the aerostatic lubrication systemswe consider, in various degree, equations describing the air properties. Suited to the needs and computational possibilities, specific models are described by a smaller or larger number of assumptions and simplifications. The basic assumptions in the aerostatic lubrication theory are as follows: – there is no change of pressure p in the direction perpendicular to the working surfaces, – air flow through the air-gap is laminar and continuous, – viscosity of the air is constant in the whole area of the sliding layer, – the working surfaces are undistortable, – there is no cavitations, – the influence of the inertial forces of the air on work parameters of the system is negligible, – ambient interaction is constant (constant temperature and pressure)." @default.
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- W945335068 date "2007-01-01" @default.
- W945335068 modified "2023-09-23" @default.
- W945335068 title "Computer simulation of a planar aerostatic two-coordinate relative base with electromagnetic drive" @default.
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