Recursive Model Free Controller for trajectory tracking of MIMO nonlinear systems

3rd International Conference on Systems and Control

Tian

Aïtouche

et al. 2013

Self Cite

In this paper, a Third-order dimensional nonlinear model is proposed for a bio-diesel engine equipped with a Variable Geometry Turbocharger (VGT) and an Exhaust Gas Recirculation (EGR) valve. The referred model which takes into account the engine air-path dynamics and its corresponding uncertain dynamics is a non-minimum phase unstable system. The fuel flow rate W f which is considered as input for the engine crankshaft subsystem acts as an external perturbation for the three-order dimensional non-minimum phase air-path subsystem. The global control objectives are to track desired values of exhaust manifold pressure and compressor flow mass rate which can be suitably chosen according to low emission criterions. For the considered objectives a composed adaptive robust stabilization control is proposed: an inner uncertain dynamics compensation sub-control and an outer Piecewise Continuous Hybrid Systems (PCHS) based stabilization subcontrol. The inner compensation sub-control considers a unknown input observer which realizes the compensation of the uncertain system dynamics. The outer loop concerns the PCHS based EGR & VGT control. With the inner compensation subcontrol, this outer stabilization loop ensures both the desired exhaust manifold pressure and the desired compressor mass flow rate trajectory tracking.The robustness and efficiency of the proposed method are demonstrated by simulation results.

“…Thus considering the above equations (11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and the definition of e y = y − y, one obtainṡ…”

Section: A Unknown Input Observer Based Compensation Sub-controlmentioning

confidence: 99%

Section: B Pcs Based Sub-stabilization Controlmentioning

confidence: 99%

See 1 more Smart Citation

Composed adaptive control of a bio-diesel engine with EGR & VGT

3rd International Conference on Systems and Control

Tian

Aïtouche

et al. 2013

Self Cite

“…In this study, γ is supposed to be 1. This type of controller was firstly proposed in [19], [24] and can be generalized as a robust trajectory tracking controller for MIMO nonlinear system [20], [25].…”

Section: Diesel Engine Speed Regulation Modelmentioning

confidence: 99%

Hybrid adaptive control used in diesel engine speed regulation

2011 19th Mediterranean Conference on Control &Amp; Automation (MED)

Bosche

Tian

2011

In this paper, a hybrid adaptive control to realize an entire enveloppe speed regulation with fast operating condition changes and input saturation constraint is proposed. It is based on a simplified nonlinear parameter varying diesel engine model which includes variable transport delays in fueling input. The proposed controller which consists of a derived piecewise continuous controller based jumping-up sub-controller and a friction and load torque observer based Lyapunov function stabilization sub-controller guarantees the closed-loop system stability and demonstrates perfectly unknown friction and load torque disturbance rejection capacities. Comparing with a linear parameter varying control, the proposed hybrid adaptive control has better performance in terms of settling time, steady state error and it allows no static state fueling input oscillation and nearly zero speed drop in presence of significant external load torque changes. Moreover, the proposed control has a very simple structure and can be implemented easily for real-time system control. I. INTRODUCTIONDiesel engines are recognized as the most common and preferred solution for the distributed power generating systems in numerous applications, such as automotive vehicles, ships, cranes, and electric power generators due to theirs superior fuel efficiency and durability compared to the other types of internal combustion engines [26], [8], [9]. The diesel engine design objectives are to obtain the best possible performance in terms of speed regulation (such as maintaining good transient and steady-state performance and ensuring good external friction and load disturbance rejection capabilities), fuel consumption economy and exhaust gas emissions. Often, these are conflicting and coupling objectives, e.g. engine speed control has significant impact on engine performance, fuel consumption economy and exhaust gas emission [2]. The nonlinear and open loop possible unstable nature (which is most probably due to the positive feedback from the fueling input pumped from the engine output shaft), time varying delays (due to the interval between the cylinder firings in forward-loop) and multiple operating modes makes the engine speed control a very challenging problem.Until now, different approaches have been tested for engine speed control:• methods based on linearization model which are tuned and scheduled controllers at different operating points: optimal gain scheduling controller [3]

“…Small mismatches between the mixture in the cylinder (air-burned gas-fuel) and the reference mixture can have dramatic effects. It generate extra noises, pollution and Issam Djemili is PhD student with Hautes Etudes d'Ingenieur, 13 possible stall. The general problem of combustion control can be decomposed into three control subproblems : the air path control, the cylinder balancing control problem and the fuel path control issues.…”

Section: Introductionmentioning

confidence: 99%

Control strategy for the air path dynamic system

Djemili

2012 20th Mediterranean Conference on Control &Amp; Automation (MED)

Aïtouche

et al. 2012

This paper focuses on the control of diesel HCCI engine air path. We propose a control strategy based on Recursive Model Free Controller (RMFC). This kind of controller is simple to design and it needs only the outputs of the system. On other hand, in order to estimate the state variables, an observer is used and its convergence is performed by using Lyapunov asymptotic stability and is formulated in the format of Linear Matrix Inequalities (LMI) to obtain observer gains. The proposed approach while possessing a simple structure proves a good performance in term of static state error with an accepted setting time. The proposed strategy has been successfully evaluated using a professional advanced diesel engine simulator AMEsim(LMS) platform in co-simulation with SIMULINK.Index Terms-Diesel Engine, Air path, Recursive Model Free Controller, Takagi-Sugeno models.