Bond graph modeling of a jet engine with electric starter

2018 ◽  
Vol 233 (9) ◽  
pp. 3193-3210 ◽  
Author(s):  
Morteza Montazeri-Gh ◽  
Seyed Alireza Miran Fashandi
Keyword(s):  
Modeling And Simulation ◽  
System Development ◽  
Dynamic Performance ◽  
Graph Model ◽  
Systems Design ◽  
Bond Graph ◽  
Mechatronic Systems ◽  
Jet Engine ◽  
Graph Modeling ◽  
Bond Graph Modeling

Following the technological advances in recent decades, advanced electronic systems linked to the gas turbine industry are increasingly considered by the designers of this field. For this purpose, new airborne systems in conjunction with jet engines are developed, which are incorporated in many challenging design problems such as control law and configuration design. Thus, a comprehensive modeling structure is needed that can bolster the integrity of the system development such as the bond graph approach, which is known as an efficient method for modeling complicated mechatronic systems. In this paper, modeling and simulation of a jet engine dynamic performance and aircraft motion are achieved based on the bond graph approach. At first, the electric starter bond graph model is constructed and physical relationships governing each engine component are obtained. In the aftermath, the modulated energy fields are developed for the jet engine components. Subsequently, the bond graph model of the engine is numerically simulated and experimentally tested and verified for a small jet engine. Finally, bond graph modeling and simulation of integrated engine and aircraft system is presented. The test results indicate the acceptable accuracy of the modeling approach which can be applied for innovative diagnosis and control systems design.

Bond Graph Modeling of an Internally Damped Nonideal Flexible Spinning Shaft

2010 ◽  
Vol 132 (6) ◽  
Author(s):  
A. K. Samantaray ◽  
S. S. Dasgupta ◽  
R. Bhattacharyya
Keyword(s):  
Steady State ◽  
Graph Model ◽  
Bond Graph ◽  
Design Stage ◽  
Stability Threshold ◽  
Transverse Modes ◽  
Graph Modeling ◽  
Bond Graph Modeling ◽  
Spinning Speed ◽  
Spinning Shaft

The rotating internal damping or nonconservative circulatory force in a rotor shaft system causes instability beyond a certain threshold rotor spinning speed. However, if the source loading of the drive is considered, then the rotor spin is entrained at the stability threshold and a stable whirl orbit is observed about the unstable equilibrium. As we move toward the use of more and more lightweight rotor dynamic components such as the shaft and the motor, overlooking this frequency entrainment phenomenon while sizing the actuator in the design stage may lead to undesirable performance. This applies to many emerging areas of strategic importance such as in vivo medical robots where flexible probes are used and space robotics applications involving rotating tools. We analyze this spin entrainment phenomenon in a distributed parameter model of a spinning shaft, which is driven by a nonideal dc motor. A drive whose dynamics is influenced by the dynamics of the driven system is called a nonideal source and the whole system is referred to as a nonideal system. In particular, we show the advantages of representing such nonideal drive-system interactions in a modular manner through bond graph modeling as compared to standard equation models where the energetic couplings between dynamic variables are not explicitly shown. The developed modular bond graph model can be extended to include rotor disks and bearings placed at different locations on the shaft. Moreover, the power conserving property of the junction structure of the bond graph model is exploited to derive the source loading expressions, which are then used to analytically derive the steady-state spinning frequency and whirl orbit amplitude as functions of the drive and the rotor system parameters. We show that the higher transverse modes may become unstable before the lower ones under certain parametric conditions. The shaft spinning speed is entrained at the lowest stability threshold among all transverse modes. The bond graph model is used for numerical simulation of the system to validate the steady-state results obtained from the theoretical study.

Predicting Response of a Proposed Hydraulic Control System Using Bond Graphs

1977 ◽  
Vol 99 (1) ◽  
pp. 1-8 ◽  
Author(s):  
B. W. Barnard ◽  
P. Dransfield
Keyword(s):  
Control Systems ◽  
Power Flow ◽  
Dynamic Performance ◽  
Digital Simulation ◽  
Bond Graph ◽  
Hydraulic Control ◽  
Graph Modeling ◽  
Power Bond Graph ◽  
Bond Graph Modeling ◽  
Assessment Procedures

Dynamic response is an important criterion of quality for many hydraulic control systems. It is suggested that power flow modeling procedures, and in particular the recent development of power bond graph techniques, provide the designer-analyst of hydraulic control systems with a particularly relevant means for investigating dynamic performance as he designs a proposed system. The bond graph modeling technique followed by digital simulation of the model is applied to a hydraulic system proposed for a particular task. Predicted response and subsequently measured response are given, compared, and discussed. Only generally available data and parameter assessment procedures were used for the prediction.

Modeling and Simulation of Linear Dynamic Characteristic for a Giant Magnetostrictive Actuator Using Bond Graph

2012 ◽  
Vol 433-440 ◽  
pp. 7324-7332
Author(s):  
Shi Feng Hu ◽  
Shi Jian Zhu ◽  
Qi Wei He ◽  
Jing Jun Lou ◽  
Xiang Rong Xie
Keyword(s):  
Graph Model ◽  
Bond Graph ◽  
Mechanical Interaction ◽  
Output Displacement ◽  
Linear Dynamic ◽  
Graph Modeling ◽  
Simulation And Experiment ◽  
Bond Graph Modeling ◽  
Magnetostrictive Actuator ◽  
Mechanical Dynamics

The development of an new method for formulation of transduction or input and output representation for a giant magnetostrictive actuator (GMA) is presented. The transduction model is built through the application of a bond graph modeling approach which includes the mechanical dynamics and the electro-magneto-mechanical interaction of the actuator. Simulation and experiment behavior correlation are also presented. The bond graph model allows for in-depth investigation of dynamic behavior of GMA, such as energy conversion, output displacement or force and so on.

Sign in / Sign up

Export Citation Format

Share Document