Disturbance rejection control of air–fuel ratio with transport-delay in engines

Song, Kyung‐Sik; Hao, Tianyuan; Xie, Hui

doi:10.1016/j.conengprac.2018.06.009

Cited by 32 publications

(8 citation statements)

References 24 publications

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“…By utilizing the concept of total disturbance, the literatures [23,24] illuminated the capability of ADRC to handle the mismatched nonlineari-ties in both dynamical systems and measurement model. Besides, several successful modifications of ADRC have been made for nonlinear uncertain systems with other complicated practical factors, such as time delay [25,26] and stochastic uncertainties [27,28].…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, compared with the nonlinear uncertainties dependent on system states, the capability of the conventional ADRC to deal with the uncertainties of control coefficient is limited [31]. Besides, in some practical systems, it is difficult to obtain the nominal values or approximative mathematical expression of control coefficient [13,14,25].…”

Section: Introductionmentioning

confidence: 99%

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On active disturbance rejection control for lower-triangular nonlinear uncertain systems with mismatched uncertainties and unknown control coefficients

Liu¹,

Chen

Zhao

2021

Preprint

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The paper investigates the control problem for a class of lower-triangular nonlinear uncertain systems with mismatched uncertainties and unknown values of control coefficients. Based on the signs of control coefficients rather than the nominal values or the approximative mathematical expressions, a new active disturbance rejection control is proposed. The design procedure can be concluded by three steps: determining the equivalent integrators chain form, constructing the extended state observer to estimate the total disturbance, and designing a dynamical system to let the actual input track the ideal input. Then under a mild assumption for mismatched uncertainties and unknown control coefficients, the paper rigorously analyzes the bounds of tracking error, estimating error and the error between the actual and ideal inputs. The presented theoretical results reveal the strong robustness of the proposed method to mismatched uncertainties and uncertain control input coefficients. Moreover, the tuning law of observer parameter and the parameter of dynamical input design is theoretically shown.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On active disturbance rejection control for lower-triangular nonlinear uncertain systems with mismatched uncertainties and unknown control coefficients

Liu¹,

Chen

Zhao

2021

Preprint

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“…Song et al [9]controls AFR for gasoline engines to overcome estimations of air flow ratesby developing physics-based AFR using two online correction factors for increased accuracy It uses anextended state predictor observer (ESPO) to estimate total disturbance and predict AFR.Montasser and Samra [10] created asmart mechatronic system developed to controlspark plug ignitionengines.Study by Kumar et al [11] analyzed the AFR problem by a cycle-based model. Motorcycle is the most popular transportation mode in Indonesia.…”

Section: Introductionmentioning

confidence: 99%

Electronic Kit Controller to Increase a Motorcycle Engine's Power and Torque

2020

IJETER

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The aim of this work is to develop an electronic kit controller for motorcycle engine, to be able to increase power and torque than standard one. The kit developed is based on Arduino Uno microcontroller. The test engine is a 108.2 cc cylinder capacity Honda PGM-FI eSPwith compression ratio of 9.5:1. The testing engine has applied electronic control unit (ECU) to maintain its combustion closed to stoichiometric condition at certain air fuel ratio (AFR) which is considered as the most optimum engine performance. It has an Oxygen sensor of narrow band type on the exhaust manifold. In this work, the kit will decrease the AFR slightly in order to have more power and torque for the testing engine. Dynamometer test is carried out to evaluate power and torque parameters of the test engines. Emission test is also conducted to have AFR and emission level. The results show that the electronic kit controller developed as part of this work increases the test engine's power and torque. The emission levels are still below the permitted level.

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“…The TWC is a device through which toxic pollutants are converted into less toxic mixtures by catalyzing a redox reaction (reduction or oxidation). The time‐varying delay originates from the varying strokes of the engine and the location of the UEGO sensor downstream of the TWC and is a decreasing function of the engine speed . Delay compensation needs to be addressed to avoid bandwidth reduction and performance deterioration and to provide precise AFR regulation in the presence of purge disturbances.…”

Section: Introductionmentioning

confidence: 99%

Reciprocal convex approach to output‐feedback control of uncertain LPV systems with fast‐varying input delay

Salavati

Grigoriadis

Franchek

2019

Intl J Robust & Nonlinear

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Summary Robust control of parameter‐dependent input delay linear parameter‐varying (LPV) systems via gain‐scheduled dynamic output‐feedback control is considered in this paper. The controller is designed to provide disturbance rejection in the context of the induced scriptL2‐norm or the scriptL2−scriptL∞ norm of the closed‐loop system in the presence of uncertainty and disturbances. A reciprocally convex approach is employed to bound the Lyapunov‐Krasovskii functional derivative and extract sufficient conditions for the controller characterization in terms of linear matrix inequalities (LMIs). The approach does not require the rate of the delay to be bounded, hence encompasses a broader family of input‐delay LPV systems with fast‐varying delays. The method is then applied to the air‐fuel ratio (AFR) control in spark ignition (SI) engines where the delay and the plant parameters are functions of the engine speed and mass air flow. The objectives are to track the commanded AFR signal and to optimize the performance of the three‐way catalytic converter (TWC) through the precise AFR control and oxygen level regulation, resulting in improved fuel efficiency and reduced emissions. The designed AFR controller seeks to provide canister purge disturbance rejection over the full operating envelope of the SI engine in the presence of uncertainties. Closed‐loop simulation results are presented to validate the controller performance and robustness while meeting AFR tracking and disturbance rejection requirements.

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Disturbance rejection control of air–fuel ratio with transport-delay in engines

Cited by 32 publications

References 24 publications

On active disturbance rejection control for lower-triangular nonlinear uncertain systems with mismatched uncertainties and unknown control coefficients

On active disturbance rejection control for lower-triangular nonlinear uncertain systems with mismatched uncertainties and unknown control coefficients

Electronic Kit Controller to Increase a Motorcycle Engine's Power and Torque

Reciprocal convex approach to output‐feedback control of uncertain LPV systems with fast‐varying input delay

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