Non-linear control design for a boost converter using bond graphs

2002 ◽  
Vol 216 (1) ◽  
pp. 1-11 ◽  
Author(s):  
X Lin-Shi ◽  
J-M Retif ◽  
B Allard ◽  
H Morel
Keyword(s):  
Current Mode ◽  
Bond Graph ◽  
Boost Converter ◽  
Linear Control ◽  
Control Law ◽  
Model Errors ◽  
Real Time Control ◽  
Power Semiconductor ◽  
Non Linear ◽  
Averaged Model

The bond graph technique is applied to model a boost converter in order to derive an averaged model. The obtained averaged model is non-ideal as it takes into account most of the converter non-linearities introduced by power semiconductor devices. An ideal averaged model of the converter can be deduced easily for computing a non-linear control law in a real-time control context. The current-mode control of the boost converter is considered. The zero dynamics are studied by both classical theory and the bond graph approach. A modified version of a conventional nonlinear control law is proposed in order to improve the dynamic behaviour and to reduce the sensitivity to control model errors. The non-ideal averaged model is used firstly for simulation analyses of the proposed control law and then for comparison with experimental results.

Non-linear control of a series direct current motor via flatness and decomposition in the bond graph domain

2005 ◽  
Vol 219 (3) ◽  
pp. 215-229 ◽  
Author(s):  
S Junco ◽  
A Donaire ◽  
A Achir ◽  
C Sueur ◽  
G Dauphin-Tanguy
Keyword(s):  
Control System ◽  
Direct Current ◽  
Controller Design ◽  
Bond Graph ◽  
Linear Control ◽  
System Decomposition ◽  
Direct Current Motor ◽  
Non Linear ◽  
Control System Synthesis ◽  
Main Components

A bond graph (BG) based methodology for non-linear control system synthesis is presented through its application to a speed-tracking problem stated on a series direct current motor. After a global flatness analysis of the motor BG model, a two-loop cascade control structure is decided and developed on the basis of a physical system decomposition in electrical, mechanical, and coupling submodels. Each loop of the cascade tracks a reference for a flat output that is local to a subsystem of the decomposition. Bond graph techniques are given for the three main components of the design methodology: system decomposition, flatness analysis, and tracking controller design. Theoretical and practical properties of the resulting control system are discussed, and its performance is demonstrated through simulation experiments. The methodology is applicable to the broader class of non-linear BG models where input-output system inversion is well defined.

scholarly journals Robust non-linear control of a hybrid water pumping system based on induction motor

2020 ◽  
Vol 11 (4) ◽  
pp. 1995
Author(s):  
Zakaria Massaq ◽  
Abdelouahed Abounada ◽  
Mohamed Ramzi
Keyword(s):  
Induction Motor ◽  
Sliding Mode ◽  
High Capacity ◽  
Boost Converter ◽  
Climatic Conditions ◽  
Linear Control ◽  
Sliding Mode Controller ◽  
Integral Sliding Mode ◽  
Pumping System ◽  
Non Linear

This contribution presents a non-linear control of a hybrid pumping system supplied with a photovoltaic generator and a battery. This system is employed for delivering a continuous volume of water whatever the climatic conditions. In the DC side, a boost converter is controlled with the indirect double integral sliding mode controller (DISMC) for maximum power point tracking (MPPT). The DISMC is suitable for MPPT because it gives a fast response and reduces the amplitude of power oscillations. Then, a bidirectional buck-boost converter is adopted to ensure the energy management between the battery and the DC-bus, and this converter is controlled with integral sliding mode control (ISMC) theory.  The non-linear predictive control (NPC) is chosen to drive an induction motor (IM), the NPC is known by its fast dynamic and high capacity to reject disturbances. The hybrid system is modelled in MATLAB/Simulink software. During simulations, the DISMC-MPPT is compared with other techniques such as sliding mode controller (SMC) MPPT and integral SMC MPPT, the DISMC provides the best tracking performances under different irradiances. Moreover, the designed controller for the bidirectional converter regulates the DC-link voltage with better performances than the classical PI controller. Lastly, the NPC regulates the speed of the IM with high robustness.

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