Transdisciplinary models of hydraulic drives of mobile machinery

«System analysis and applied information science» ◽

10.21122/2309-4923-2018-4-51-55 ◽

2019 ◽

pp. 51-55

Author(s):

A. V. Puzanov

Keyword(s):

Control Systems ◽

Dynamic Properties ◽

Comprehensive Analysis ◽

Mathematical Apparatus ◽

Work Processes ◽

Indicator Diagram ◽

Hydraulic Machine ◽

Mobile Machinery ◽

Micro Level ◽

And Control

Modern drive engineering requires a comprehensive analysis of all work processes in hydraulic drives, solving the problems of modeling the technological processes of their production using mathematical and software tools of various physicality.The article proposes an approach to the development of hydrodrives of mobile equipment based on transdisciplinary models of instruments and control systems. These models are designed to unite in a single information space a methodical and mathematical apparatus of various physicality: mechanics, kinematic, hydromechanics, heat engineering, and methods for their solution. These measures will increase their adequacy, reduce assumptions and reduce the safety factor as a measure of imperfection of the scientific and technical understanding of the facility.The article gives an example of the use of this approach in the development of volumetric hydraulic drives of mobile equipment a technique for calculating the indicator diagram of an axial-plunger hydraulic machine at a micro level using the Matlab / Simulink, Autodesk Simulation CFD and Autodesk Simulation Mechanical software complexes. The indicator diagram of the hydraulic machine is a clear characteristic of the dynamic qualities of the product. From the correctness of the calculation of this characteristic, the dynamic properties, reliability and resource of the drive as a whole depend.

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Problems of Choosing Optimization Method for Next-Generation Aviation Radio Control Systems

SPIIRAS Proceedings ◽

10.15622/sp.2019.18.3.534-556 ◽

2019 ◽

Vol 18 (3) ◽

pp. 535-557 ◽

Cited By ~ 1

Author(s):

Vladimir Verba ◽

Vladimir Merkulov

Keyword(s):

Control Systems ◽

Dynamic Properties ◽

Optimization Methods ◽

Optimization Method ◽

Information Support ◽

Computationally Efficient ◽

Maneuvering Targets ◽

Control Signals ◽

High Dynamics ◽

And Control

Analysis of the trends of military-technical confrontation in the aerospace sector allows us to identify a number of areas that directly affect the information and control side of the operation of aviation radio control systems, including: group use of means of attack and defence; the qualitative complexity of the laws of the mutual spatial placement of the aircraft; high dynamics, nonstationarity of environment; use of control modes and information support on the verge of buckling, which is characteristic of super-maneuverable aircraft and intensively maneuvering targets tracking systems; the discrepancy of the dynamic properties of airborne targets and interceptors; growing complexity of information support algorithms. Mathematical apparatus used for synthesis of aircraft control systems must provide: effective guidance on targets maneuvering under complex laws, including the change of signs of derivatives; guaranteed withdrawal from the boundaries of stable (dangerous) work, including collision prevention in groups; accounting for the discrepancy between the dynamic properties; redistribution of control priorities in the guidance process; universality of the formation of guidance methods and feasibility of information support algorithms. Analysis of the possibilities of classical optimization methods based on minimization of quadratic quality functionals showed that they are not able to meet the totality of these requirements and thus new approaches are required. As such, it is proposed to use the synthesis of control signals that are optimal for a minimum of quadratic-biquadrate quality functional. The application of this approach in the framework of computationally efficient local optimization is considered. An example of the synthesis of a method of guidance, illustrating the possibility of the formation of control signals, providing guidance of inertial aircraft to intensively maneuvering targets accounting for both linear and nonlinear dependences on the operation errors and the mismatch of the dynamic characteristics of the target and interceptor.

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