scholarly journals DYNAMIC MODEL OF THE DRIVE MACHINES FOREST COMPLEX

2021 ◽  
Vol 4 (4) ◽  
pp. 102-108
Author(s):  
Roman Yudin ◽  
Rostislav Puzakov
Keyword(s):  
Mathematical Model ◽  
Dynamic Model ◽  
Hydraulic Drive ◽  
Process Dynamics ◽  
Dynamic Factors

The movement of the working body from the corresponding drive is described by a kinematic mathematical model that is adequate to the case of the absence of dynamic factors. This model should be adjusted and take into account the load dynamics. For the case of a mechanical drive of the working body, it is quite sufficient to determine the dependence of the process dynamics coefficient on a known combination of active factors. The working body is driven by a hydraulic drive, then when building a dynamic model of the object, it is necessary to take into account the hydrodynamics of the drive.

scholarly journals Simulation of loading dynamics and hydrodynamics of drives of forest machine working bodies

2021 ◽  
Vol 875 (1) ◽  
pp. 012060
Author(s):  
N Yu Yudina ◽  
R V Yudin ◽  
A I Maksimenkov
Keyword(s):  
Hydraulic System ◽  
Hydraulic Drive ◽  
Pressure Change ◽  
Hydraulic Cylinder ◽  
Inertial Forces ◽  
Hydraulic Motor ◽  
Process Dynamics ◽  
Dynamic Factors ◽  
Working Bodies ◽  
Body Loading

Abstract The need to take into account the dynamic processes that occur when performing technological operations using the working bodies of forest machines with a hydraulic drive is due to the fact that its absence leads to a distortion of the obtained results, since the kinematic schemes do not take into account the influence of hydraulic fluid in the elements of the hydraulic system. In this regard, it became necessary to develop models that take into account the dynamics of working body loading and the hydrodynamics of its drives. It is recommended to consider the influence of the process dynamics by introducing dynamic factors. The resulting mathematical model allows you to determine the actual values of the hydraulic cylinder, taking into account the errors associated with fluid leakage. As a result of the study, it was possible to connect the pressure change in the hydraulic cylinder, the movement of the pistons in the hydraulic cylinder and the rotor of the hydraulic motor, as well as the appearance of inertial forces. The connecting component is the balance of fluid and hydraulic system volumes.

Mathematical Model of Pressure and Flow Distribution on Fluorine Production Lines

2015 ◽  
Vol 1084 ◽  
pp. 678-683
Author(s):  
Oleg P. Savitsky ◽  
Valeriy F. Dyadik ◽  
Oksana P. Kabrysheva
Keyword(s):  
Mathematical Model ◽  
Dynamic Model ◽  
Dynamic Models ◽  
Flow Distribution ◽  
Hydrodynamic Regime ◽  
Technological Scheme ◽  
Control Algorithms ◽  
Production Lines ◽  
Methods Of Synthesis ◽  
Effective Use

This paper is devoted to one of the most urgent problems in the automation of fluorine production (FP) processes: the development of a dynamic model of the hydrodynamic regime. The paper suggests a dynamic model represented in the form that provides the effective use of up-to-date methods of synthesis and analysis for control algorithms. The model is a set of dynamic models of individual units and devices that have a significant impact on the processes in the technological scheme.

A Universal Mathematical Model for a New Combined-Cycle, Fossil-Fuel Power System (LAJ Cycle): Part 2 — Dynamic Model

2002 ◽  
Author(s):  
Roddie R. Judkins ◽  
Timothy R. Armstrong ◽  
Solomon D. Labinov
Keyword(s):  
Mathematical Model ◽  
Power System ◽  
Dynamic Model ◽  
Fossil Fuel ◽  
Dynamic Models ◽  
Combined Cycle ◽  
Transition Time ◽  
Entire System ◽  
Partial Load ◽  
System Components

A Universal Mathematical Model (UMM) has been developed and applied to a combined-cycle, fossil-fuel power system. The UMM includes static and dynamic models of the system. The static model allows for thermodynamic and thermochemical analyses of the basic system components (reformer, turbine, membrane separator, fuel cell, air compressor, heat exchanger, and other components) and the entire system. The dynamic model provides for mode-to-mode (a partial load to a full or nominal load) time determination for the individual system components and for the entire system. System transient modes were studied, and it was determined that the reforming reactor transition time should be no less than 200 sec, which results in a system mode-to-mode transition time of three to four minutes.

Dynamic Model of a Wind-Driven Lift Pump

1996 ◽  
Vol 210 (4) ◽  
pp. 279-293 ◽  
Author(s):  
J D Burton ◽  
D G Davies
Keyword(s):  
Experimental Data ◽  
Dynamic Model ◽  
Wind Power ◽  
Remote Areas ◽  
Dynamic Factors ◽  
The World ◽  
Water Pumps

This paper examines the dynamics of one of the oldest pieces of equipment known to mankind, the simple lift pump. These continue to be used in remote areas of the world for lifting water by hand or using wind power. In the case of the smaller modern wind-powered water pumps the speed of operation is such that dynamic factors need to be taken into account when designing the pump. The paper explores the value of introducing softness and elasticity into either the lift rod or the riser support. Output from models describing the pump dynamics are compared with experimental data.

About the Dynamic Model Formation of the Urban Livelihood System Compatible with the Biosphere

2015 ◽  
Vol 725-726 ◽  
pp. 1224-1230 ◽  
Author(s):  
Vyacheslav Ilyichev ◽  
Vitaliy Kolchunov ◽  
Sergey Emelyanov ◽  
Natalia Bakaeva
Keyword(s):  
Mathematical Model ◽  
Conceptual Model ◽  
Dynamic Model ◽  
Self Organization ◽  
Urban Livelihood ◽  
Model Formation ◽  
The City ◽  
Livelihood System

Here is presented an approach to the simulation of complex in its multicomponent structure for implementing the functions of city activity. The approach is based on the paradigm of the city compatibility with the Biosphere and phrased on the principles of its self-organization. A conceptual model of the urban livelihood system in the form of a multicomponent natural and technogenic structure is also described. A mathematical model of an open dynamic compatible with the Biosphere urban livelihood system with the choice of the governing parameters for management is developed.

Mathematical model of energy saving hydraulic turning mechanism forestry manipulator

2015 ◽  
Vol 5 (4) ◽  
pp. 223-234
Author(s):  
Попиков ◽  
Petr Popikov ◽  
Клубничкин ◽  
Vladislav Klubnichkin
Keyword(s):  
Mathematical Model ◽  
Energy Saving ◽  
Rotational Motion ◽  
Basic Equation ◽  
Hydraulic Drive ◽  
Vertical Axis ◽  
Mass Point ◽  
Piston Motion ◽  
Mechanical Process ◽  
Turning Mechanism

Presented simulation mathematical model of the mechanism of rotation of the column manipulator with energy-saving hydraulic drive. The model takes into account three mechanical process: the rotational movement of the column arm around a vertical axis load sway relative attachment points on the boom arm and the piston motion of fluid accumulator. To describe the rotation of the column using the basic equation of dynamics of rotational motion. The load represented either as a mass point, when the dimen-sions are small and the proportionality, or a rod if the simulated moving manipulator logs or pipes.

Dynamic Model and Response of Robot Manipulators With Joint Irregularities

1993 ◽  
Vol 115 (1) ◽  
pp. 70-77 ◽  
Author(s):  
R. J. Chang ◽  
T. C. Jiang
Keyword(s):  
Mathematical Model ◽  
Dynamic Model ◽  
High Speed ◽  
Robotic Manipulator ◽  
Irregular Surface ◽  
Positioning Accuracy ◽  
Linearization Methods ◽  
Accuracy And Precision ◽  
Covariance Propagation ◽  
The Mathematical Model

The dynamic equation of a robotic manipulator with joint irregularities is formulated and employed for the prediction of the positioning accuracy and precision of a robotic manipulator in high-speed operation. The mathematical model is derived by incorporating a dynamic model of irregular joints in an ideal robotic equation and employing the Lagrangian formulation. The joint irregularity is modelled as an elastic sliding pair which consists of a journal with an irregular surface sliding on the surface of an elastic bearing. By employing Gaussian linearization methods, the operational accuracy and precision of the robotic manipulator are obtained from mean and covariance propagation equations of the robotic system. The operation of a single-arm robotic manipulator with joint irregularities is investigated for demonstrating the applications of the present techniques.

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