Forecasting technique of radio information system characteristics for optimal technical condition of the space control system components

The article considered the assessment of the technical condition of a petal bearing with adjustable stiffness. A schematic diagram of bearing stiffness control is presented. Revealed a constructive solution providing rigidity adjustment. For a qualitative assessment of the technical condition, a petal bearing was modeled in the VATCAD environment. The schematic diagram and block diagram of the control system of the experimental stand for assessing the technical condition of the petal bearing are described. Recommendations are given for the further application of the concept of assessing the technical condition of petal bearings.

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Root-Locus Analysis of Structural Coupling in Control Systems

Journal of Applied Mechanics ◽

10.1115/1.4011983 ◽

1959 ◽

Vol 26 (2) ◽

pp. 205-209

Author(s):

R. H. Cannon

Keyword(s):

Control System ◽

Control Systems ◽

Natural Frequency ◽

Feedback System ◽

Structural Member ◽

Root Locus ◽

Structural Coupling ◽

Root Locus Analysis ◽

Platform System ◽

System Characteristics

Abstract When a feedback system is devised to control a mechanical member that is structurally limber, unstable (“self-excited”) vibrations may be encountered at approximately a natural frequency of the structural member. Cures are generally easy to effect once the phenomena are understood. Two interesting cases are described: ground vibrations of an airplane control system due to a limber fuselage, and vibrations of a stable platform system due to limberness in the platform structure. The investigations are carried out using the root-locus technique, which provides a plot of system characteristics as explicit functions of control strength. In the case of the stable platform, the analysis is found to be more reliable than physical intuition.

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Urban Expressway-Arterial Corridor On-Line Control System Based on Advanced Traveler Information System

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2000-06 ◽

2007 ◽

Vol 2000 (1) ◽

pp. 44-50 ◽

Cited By ~ 1

Author(s):

Qiang Meng ◽

Hooi Ling Khoo ◽

Ruey Long Cheu

Keyword(s):

Information System ◽

Control System ◽

Traveler Information ◽

Urban Expressway ◽

Advanced Traveler Information System ◽

On Line

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A Review on Active Bearings and Perspectives of Using Them in Rotating Machinery

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.630.181 ◽

2014 ◽

Vol 630 ◽

pp. 181-187

Author(s):

Denis Shutin ◽

Leonid Savin ◽

Alexander Babin

Keyword(s):

Mathematical Modeling ◽

Artificial Intelligence ◽

Control System ◽

Motion Control ◽

Dynamic Characteristics ◽

Rotating Machinery ◽

Fluid Film ◽

Motion Control System ◽

Fluid Film Bearings ◽

System Components

The paper examines the issues of improving the rotor units by means of using support units with actively changeable characteristics. An overview of the known solutions related to the use of active bearings in various types of turbomachinery is provided. A closer look is given at the design and features of active radial bearings, the main elements of which are fluid film bearings. The results of mathematical modeling of active hybrid bearings are presented. The prospects of the use of this type of supports to improve the dynamic characteristics of rotating machinery, including reducing vibrations caused by various factors, are analyzed. Promising directions of development of active bearings are considered, which primarily involves the modification of system components and rotor motion control system algorithms, including intelligent technologies and artificial intelligence methods.

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