Reliability control for uncertain half‐car active suspension systems with possible actuator faults

Sun, Wei; Pan, Huihui; Yu, Jinyong; Gao, Huijun

doi:10.1049/iet-cta.2013.0471

Cited by 44 publications

(37 citation statements)

References 34 publications

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“…And, fault-free (normal) case with = = 1. In order to facilitate the analysis, the following matrix is introduced [24]:…”

Section: Actuator Fault Modelmentioning

confidence: 99%

“…In [24], a fault-tolerant control approach is proposed to deal with the problem of fault accommodation for unknown actuator failures of active suspension systems, where an adaptive robust controller is designed to adapt and compensate the parameter uncertainties, external disturbances and uncertain non-linearities generated by the system itself and actuator failures. In [25], the robust fault-tolerant control problem of active suspension systems with finite-frequency constraint is investigated.…”

Section: Introductionmentioning

confidence: 99%

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Passive fault-tolerant control for vehicle active suspension system based on H2/H∞ approach

Zhang¹,

Gong²

2018

J. vibroeng.

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Abstract. In this paper, a robust passive fault-tolerant control (RPFTC) strategy based on / approach and an integral sliding mode passive fault tolerant control (ISMPFTC) strategy based on / approach for vehicle active suspension are presented with considering model uncertainties, loss of actuator effectiveness and time-domain hard constraints of the suspension system. performance index less than and performance index is minimized as the design objective, avoid choosing weighting coefficient. The half-car model is taken as an example, the robust passive fault-tolerant controller and the integral sliding mode passive fault tolerant control law is designed respectively. Three different fault modes are selected. And then compare and analyze the control effect of vertical acceleration of the vehicle body and pitch angular acceleration of passive suspension control, robust passive fault tolerant control and integral sliding mode passive fault tolerant control to verify the feasibility and effectiveness of passive fault tolerant control algorithm of active suspension. The studies we have performed indicated that the passive fault tolerant control strategy of the active suspension can improve the ride comfort of the suspension system.

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“…And, fault-free (normal) case with = = 1. In order to facilitate the analysis, the following matrix is introduced [24]:…”

Section: Actuator Fault Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Passive fault-tolerant control for vehicle active suspension system based on H2/H∞ approach

Zhang¹,

Gong²

2018

J. vibroeng.

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show abstract

“…Such a command filter is similar to the first filter shown in Fig. 2 to implement the mechanical or operating constraints on virtual control law v. Here, it is required that the command filter can implement the same position constraints on adaptive control v as shown in (2). Choosing a quadratic function V zn in (6) and the functional V Un in (7), and applying the Young's inequality, we obtaiṅ V zn +V Un ≤ g n z n u + ξ n1 |z n ||u| + z n (g n α n + θ T n F θn −α n−1 )…”

Section: Remarkmentioning

confidence: 99%

“…The parameters g 1 and g 2 are given as g 1 = 2, g 2 = 1 and θ f1 = 0.6 sin(x 1 ), θ h2 = 0.5(x 2 1 + x 2 2 ) sin(x 2 ) are assumed as unknown and varying parameters. For the unknown functions δ f1 (·) and δ h2 (·), their bounds are assumed as |δ f1 (…”

Section: Remarkmentioning

confidence: 99%

Robust adaptive control of non‐linear time‐delay systems with saturation constraints

Pan

Sun

Gao

et al. 2015

IET Control Theory & Applications

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In this study, a robust adaptive control strategy is presented for a class of uncertain time-delay non-linear systems in the presence of non-symmetric saturation constraints. On the one hand, an auxiliary system is constructed to reduce the negative effects cased by possible saturations, and the following stability proof ensures the theoretical strictness; the unknown time delays, on the other hand, are compensated by choosing appropriate Lyapunov-Krasovskii functions. Furthermore, the hyperbolic tangent functions are employed to efficiently avoid the controller singularity problem encountered in Lyapunov synthesis, and it is proved that the proposed controller design method is able to guarantee semi-global uniform ultimate boundedness of all the signals in the closed-loop system. Finally, an example simulation is conducted to verify the effectiveness of theoretic results.

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“…Similar to the other practical systems, unknown faults in actuators and sensors or failure of component continually happen, which result in performance degradation and even instability of the active suspension systems. [19][20][21] To strengthen reliability, ensure stability, and achieve requirement performance of the closed-loop active suspension systems, effective fault-tolerant control (FTC) technologies are crucial. Motivated by this reason, significant research efforts for FTC technologies of active suspension systems have been devoted.…”

Section: Introductionmentioning

confidence: 99%

Fault‐tolerant sliding mode control for uncertain active suspension systems against simultaneous actuator and sensor faults via a novel sliding mode observer

Zhang

Geng

2018

Optim Control Appl Methods

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In this paper, the problem of fault estimation and fault-tolerant control for half-car active suspension system with simultaneous varying sprung and unsprung mass, actuator fault, and sensor fault is investigated. First, Takagi-Sugeno fuzzy approach is used to describe the uncertain half-car active suspension system with simultaneous actuator fault and sensor fault. Then, a novel augmented descriptor sliding mode observer is designed to estimate the state of system, actuator fault, and sensor fault with good precision. Based on the state and fault estimation, a fault-tolerant sliding mode control scheme is designed to stabilize the resulting fault half-car active suspension system. By utilizing Lyapunov stability theory, the existence condition for the proposed sliding mode observer and fault-tolerant sliding mode controller is provided in terms of linear matrix inequalities (LMIs). In addition, it is shown that the reachability of the developed sliding surface can be ensured under the design control law.Finally, simulation results for uncertain half-car active suspension systems are presented to demonstrate the effectiveness of the proposed design techniques. KEYWORDSfault estimation, fault-tolerant control, sliding mode control, T-S fuzzy system, uncertain half-car active suspension system *Nomenclature: , pitch angle; b 1 , distance between the front axle and the center of mass; b 2 , distance between the rear axle and the center of mass; cf and c r , stiffness of the passive elements of front wheel and rear wheel, respectively; I 2 , mass moment of inertia for the pitch motions; K 2f and K 2r , front and rear suspension spring stiffness, respectively; M 2 , car body mass; m 1f and m 1r , front and rear unsprung masses, respectively; u f (t) and u r (t), front actuator and rear actuator force inputs, respectively; Z 2 , car body displacement; Z 0f and Z 0r , road inputs related to the front and rear wheel, respectively; Z 1f and Z 1r , mass displacement of front and the rear unsprung, respectively; Z 2f and Z 2r , mass displacement of front and rear body, respectively.

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Reliability control for uncertain half‐car active suspension systems with possible actuator faults

Cited by 44 publications

References 34 publications

Passive fault-tolerant control for vehicle active suspension system based on H2/H∞ approach

Passive fault-tolerant control for vehicle active suspension system based on H2/H∞ approach

Robust adaptive control of non‐linear time‐delay systems with saturation constraints

Fault‐tolerant sliding mode control for uncertain active suspension systems against simultaneous actuator and sensor faults via a novel sliding mode observer

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