L<sub>2</sub> gain state derivative feedback control of uncertain vehicle suspension systems

Yazıcı, Hakan; Sever, Mert

doi:10.1177/1077546317711335

Cited by 29 publications

(17 citation statements)

References 42 publications

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“…Given the active suspension system actuated by asymmetric electrohydraulic actuator, synthesize the adaptive robust control law u for spool displacement to stabilize the vertical motion of suspension system while to address the parametric uncertainties and high nonlinearity in both main-loop system and sub-loop system. Meanwhile, the constraints requirements in equations (16) and (17) as well as the close-loop system stability are guaranteed.…”

Section: Problem Statementmentioning

confidence: 99%

“…16 Recently, a robust L 2 gain state derivative feedback controller was designed for uncertain active suspension system, successfully improving the ride comfort without deterioration of road holding ability. 17 However, most of the existing literatures have focused on the main-loop controller design, i.e. figuring out the desired control force that can suppress the vibration of suspension system effectively.…”

Section: Introductionmentioning

confidence: 99%

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Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

Zhao

et al. 2020

Journal of Low Frequency Noise, Vibration and Active Control

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This study investigates the vibration control issue of active suspension systems. Unlike previous results that neglect the actuator dynamics or consider the impractical symmetrical hydraulic cylinder model, this paper incorporates more reasonable asymmetric electrohydraulic actuator into active suspension system and derives its dynamic model. However, whether active suspension or electrohydraulic actuator suffers from nonlinearities (e.g. nonlinear spring, nonlinear damper and nonlinear actuator dynamics) and parameters uncertainties (e.g. the variations of sprung mass and hydraulic fluid’s bulk modulus as well as hydraulic cylinder original control volumes) , which were rarely synthetically considered in the existing researches.To address these issues, we develop a novel dual adaptive robust controller (ARC). An ARC is firstly designed for main-loop system for stabilizing the car body and improving ride comfort in the presence of nonlinearities and parameter uncertainties as well as road disturbances. In order to meet the constraints requirements of suspension system, the tunable parameters in main-loop control law are optimized by solving linear matrix inequality with kidney-inspired algorithm. Another ARC is further synthesized for sub-loop system to deal with the nonlinear and uncertain dynamics in electrohydraulic actuator for ensuring the force tracking performance. Meanwhile, the uncertain parameters are estimated online to compensate the model deviation. The terminal control law is able to guarantee the asymptotic stability of close-loop system within Lyapunov framework. Finally, the effectiveness and robustness of the proposed controller are demonstrated via excessive simulation experiments over different road conditions.

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Section: Problem Statementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

Zhao

et al. 2020

Journal of Low Frequency Noise, Vibration and Active Control

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“…According to the statistics of National Highway Traffic Safety Administration (NHTSA), 33% of all deaths from passenger vehicle crashes are related to rollover accidents in 2002. As a consequence, research studies on suspension system aiming at improving handling performance and reducing rollover propensity has found prosperity in terms of both active/semiactive controlled and passive suspensions [1][2][3][4][5][6][7][8]. Many active/semiactive control strategies, such as H ∞ control strategies and sliding-mode control strategies, have been utilized onto vehicle to enhance handling performance and ride comfort [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Analysis of Vehicle Incorporating Hydraulically Interconnected Suspension System with Dual Accumulators

Chen

Zhang

et al. 2018

Shock and Vibration

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A novel roll-resistant hydraulically interconnected suspension with dual accumulators on each fluid circuit (DHIS) is proposed and dynamic characteristics of vehicle incorporating DHIS subsystem are studied in this paper. A 10-degrees-of-freedom (DOFs) vehicle model coupled with DHIS subsystem is established and validated. Four physical parameters of DHIS subsystems which are crucial to vehicle responses are selected with prescribed variation ranges to explore their relationships with the vehicle performance. Simulations of vehicle conducting sine-wave steering maneuvers are carried out to evaluate handling performance with roll angle and vertical tyre force for DHIS subsystem with the parameters varying, compared with the results for vehicle with the original spring-damper suspension and conventional hydraulically interconnected suspension (HIS). On the other hand, ride comfort performance indicated by total weighted root mean square accelerations at the center of gravity is studied when vehicle is excited by three different types of road pavements when the four parameters vary in the prescribed ranges. Simulation results are compared to investigate the special merits of DHIS subsystem, and the parameters that influence the handling performance and ride comfort most are identified. Overall, the DHIS subsystem can effectively enhance the vehicle handling performance compared with the original spring-damper suspension, and it can also benefit much to the ride comfort in contrast to the HIS subsystem.

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“…In order to design an active suspension controller for an integrated suspension system, an L2 gain state derivative feedback controller has been proposed by Sever and Yazici [27]. Thereafter, the L2 gain state derivative feedback controller has been extended with robustness property for the systems having polytopic type uncertainties by Yazici and Sever [28]. To the best knowledge of the authors, there is no work employing optimal state derivative feedback LQR controller for active suspension design in the literature.…”

Section: Introductionmentioning

confidence: 99%

Electro Hydraulic Suspension System Design With Optimal State Derivative Feedback Controller

Sever¹,

Şendur²,

Yazıcı³

et al. 2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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This paper is concerned with a control design of an electro-hydraulic suspension system. In some practical problems, for instance in the active suspension design, the state derivative signals such as acceleration and velocity are easier to obtain rather than the state variables such as displacement and velocity, since the most commonly used sensors are the accelerometers. Hence, design of an optimal state derivative feedback controller is proposed by employing the linear matrix inequalities framework. In order to demonstrate the effectiveness of the proposed controller, a two-degree-of-freedom quarter vehicle suspension model equipped with an electro hydraulic actuator is preferred. Throughout the numerical simulation studies, bump type road irregularities at different vehicle forward velocities are applied to evaluate the performances of the controller in terms of ride comfort and safety.

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L₂ gain state derivative feedback control of uncertain vehicle suspension systems

Cited by 29 publications

References 42 publications

Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

Dynamic Characteristics Analysis of Vehicle Incorporating Hydraulically Interconnected Suspension System with Dual Accumulators

Electro Hydraulic Suspension System Design With Optimal State Derivative Feedback Controller

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L2 gain state derivative feedback control of uncertain vehicle suspension systems

Cited by 29 publications

References 42 publications

Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

Dynamic Characteristics Analysis of Vehicle Incorporating Hydraulically Interconnected Suspension System with Dual Accumulators

Electro Hydraulic Suspension System Design With Optimal State Derivative Feedback Controller

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L₂ gain state derivative feedback control of uncertain vehicle suspension systems