Calculation Method for Thermal-Hydraulic System Simulation

2008 ◽  
Vol 130 (8) ◽  
Author(s):  
Li Chenggong ◽  
Jiao Zongxia
Keyword(s):  
Mathematical Models ◽  
Calculation Method ◽  
Hydraulic System ◽  
System Simulation ◽  
Cross Coupling ◽  
System Model ◽  
Lumped Parameter ◽  
Simulation Results ◽  
Simulation Time ◽  
Hydraulic System Simulation

This paper presents the fundamental approaches of modeling thermal-hydraulic component briefly. A set of lumped parameter mathematical models is developed, which are based on conservation of mass and energy. Subsequently, the connection rule for basic thermal-hydraulic components and the method to automatically generate the complete thermal-hydraulic system model are put forward. The integration methods for solving the cross-coupling thermal-hydraulic equations are also discussed for a position-controlled thermal-hydraulic system. Simulation results show the interaction between pressure and temperature. The simplified representations of thermal-hydraulic differential equations are also proposed in this paper, which can reduce simulation time. The validity of the simplified representations is judged by simulation.

Thrust Hydraulic System of Casing Rotater with Flow Adaptive Control

2013 ◽  
Vol 655-657 ◽  
pp. 1460-1464
Author(s):  
Xian Bin Lu ◽  
Jian Hua Wei ◽  
Rui Lin Feng ◽  
Qiang Zhang
Keyword(s):  
Adaptive Control ◽  
Dynamic Characteristics ◽  
Hydraulic System ◽  
Control Method ◽  
System Simulation ◽  
Operating Principle ◽  
Matlab Simulink ◽  
Thrust System ◽  
Simulation Results ◽  
And Control

Thrust system is the key system of casing rotator. A thrust hydraulic system with flow adaptive control is designed, operating principle and control method are elaborated as well. In order to investigate the dynamic characteristics of the thrust hydraulic system, simulation analyses with the combined platform of AMESim and MATLAB/Simulink are carried out. The simulation results show that the designed thrust hydraulic system can meet the driving velocity requirement and reduce the overflow loss.

Hydraulic System Simulation Using Time-Delay Elements

1967 ◽  
Vol 89 (2) ◽  
pp. 315-320
Author(s):  
R. E. Blodgett ◽  
R. E. King
Keyword(s):  
Distributed Systems ◽  
Time Delay ◽  
Boundary Conditions ◽  
Hydraulic System ◽  
System Simulation ◽  
Digital Computation ◽  
Space Discretization ◽  
Delay Elements ◽  
Distributed Elements ◽  
Hydraulic System Simulation

A method of simulating a class of hyperbolic distributed systems without using space discretization is presented. Complex distributed systems are realized by means of subsystems of basic distributed elements. The time-delay operation forms the basis of the technique which is ideally suited to hybrid or digital computation. Using this method the system is simulated independently of its boundary conditions which may be dynamic in nature. An example of a simple hydraulic system is presented.

<i>Hydraulic System Simulation of Ditching Depth Automation Control</i>

2019 ◽  
Author(s):  
Chang WAN ◽  
Yu TAN ◽  
Xiaokang YI ◽  
Xinxing LIU ◽  
Xueting MA ◽  
...  
Keyword(s):  
Hydraulic System ◽  
System Simulation ◽  
Automation Control ◽  
Hydraulic System Simulation

Modeling and Simulation of Ship Generator Sets

2014 ◽  
Vol 1070-1072 ◽  
pp. 1898-1901
Author(s):  
Dong Xiang ◽  
Hao Xiong ◽  
Ning Bo Liu ◽  
Qiang Wu ◽  
Guang Wei Meng
Keyword(s):  
Mathematical Models ◽  
Static Load ◽  
Synchronous Generator ◽  
System Model ◽  
Technical Requirements ◽  
Speed Governor ◽  
Simulation Results ◽  
Synchronous Generator Excitation ◽  
Speed Governor System ◽  
Generator Sets

This paper establishes the mathematical models of the ship generator sets, including the diesel, speed governor system, synchronous generator, excitation system and static load, simulates the ship generator sets by Matlab/Simulink software, and tests the performance of each system to verify effectiveness of the models. The simulation results indicate that the whole system model meets technical requirements of military standard GJB.

A Regenerative Hydraulically Assisted Turbocharger System Model

2017 ◽  
Author(s):  
Tao Zeng ◽  
Devesh Upadhyay ◽  
Guoming Zhu
Keyword(s):  
Performance Measures ◽  
Hydraulic System ◽  
Hydraulic Turbine ◽  
Lumped Parameter Model ◽  
System Model ◽  
Model Complexity ◽  
Modeling Approach ◽  
Lumped Parameter ◽  
Turbocharging System ◽  
Parametric Relationships

A regenerative hydraulically assisted turbocharging system is introduced. A systematic modeling approach for the engine air-path influenced under the influence of the RHAT system is discussed. The proposed modeling approach adopted seeks to reduce model complexity by introducing simple parametric relationships between corrected performance measures and allows smooth extrapolation beyond available hydraulic turbine and pump maps. A lumped parameter model of the hydraulic system is presented. Model validation results are presented for an FTP-75 cycle.

scholarly journals Research on mechanical-hydraulic system simulation method for multi-control multiway valve

2021 ◽  
Vol 248 ◽  
pp. 02061
Author(s):  
Naixin Xiao ◽  
Lei Xu ◽  
Li-ping Zhang ◽  
Da-shuang Li
Keyword(s):  
Hydraulic System ◽  
System Simulation ◽  
Flow Distribution ◽  
Simulation Method ◽  
Design Parameters ◽  
Distribution Characteristics ◽  
Valve System ◽  
Simulation Results ◽  
Control Principle ◽  
Theoretical Results

Based on the control principle and flow distribution characteristics of the electro-hydraulic proportional load-sensitive multiway valve in an excavator, a system simulation model is established in AMEsim. After proving the accuracy of this model by comparing simulation results with theoretical results for various flow distribution characteristics under saturated and unsaturated conditions, this model is used to study the effect of three-way valve preload on the multiway valve system to prove that the simulation method can evaluate the influence of design parameters on the multiway valve system and then guide the design of multiway valves.

Sign in / Sign up

Export Citation Format

Share Document