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Suspension is one of the important parts of automobile which has a great influence on the comfort of riding, the stability of handling and the control of vehicle's posture. With the simple two degree of freedom of a quarter of the simplified model of automotive suspension, we use the fixed-gain control and the adaptive control to design the controller. Making use of the MATLAB simulation, the scientific...
The stabilization control for a class of linear parameter-varying (LPV) systems with time delay and actuator saturation is investigated in this paper. Based on Lyapunov stability theory and linear matrix inequality (LMI) technique, a delay-dependent stability sufficient condition is obtained by using the idea of delay partition and convex optimization approach. Furthermore, the estimation of the domain...
In this paper, coordinating technique for the multi-layer model predictive control (MPC) of complex water network is proposed. A multi-layer topology structure resulting from a functional decomposition of water network is briefly presented. Inside each layer, a MPC based controller is used. Between the related two layers, a multi-layer coordinating mechanism is provided to generate control strategies...
A saturation allowed scheduled anti-windup design method is proposed in this paper for the linear systems subject to input saturation. We introduced the scheduled controller design method into the anti-windup scheme, in which a family of controllers are designed. These controllers are activated depending on the response of the system, rather than only considering the worst noise case off-line. Also,...
The three-axis stabilized satellite's attitude control under repairable fault conditions is researched in this paper. With the consideration of rotational inertia uncertainty, a control effectiveness factor is used to describe the fault magnitude of satellite actuators. Moreover, the uncertainty of fault diagnosis results is also considered in the design of controller. And a feedforward control unit...
This paper focuses on an integral sliding mode control (ISMC) algorithm for the fault-tolerant control of linear continuous multi-input systems with non-smooth nonsymmetric actuator dead-zone failure and unmatched disturbances. The dead-zone is first modeled as a combination of a line and a disturbance-like term. And the novelty of the paper lies in that the treatment of the deadzone failure based...
In this paper, we consider the problems of fault detection for heavy-haul trains equipped with electronically controlled pneumatic (ECP) brake systems. A longitudinal dynamical model which has been successfully validated is used to simulate the actual situation. Based on the model, a set of unknown input observers which are adopted to estimate locomotives' state is constructed, and observers can determine...
This communication considers the case in which some aerodynamic actuator failures occur when an aircraft performs the intended maneuver. The problem considered deals with online reassignment of the remaining effective actuators to continue performing the current maneuver safely. First, through analysis of a general nonlinear system, the concept of virtual inputs and fault tolerance is proposed and...
Driver behavior diversity affects traffic process greatly especially for the traffic evacuation process. Taking the driver behavior diversity into consideration, this paper developed a meta-model of driver behavior in microscopic traffic evacuation simulation, named DGIT frame, which are Decision, Game, Individual and Transform. DGIT frame integrates heterogeneous models in different levels into a...
Based on the constitutive equations of piezoelectric materials, the dynamic model of the piezoelectric stack actuators is derived. Subsequently, experimental setup for the dynamic characteristics measurement is established. Parameters such as voltage-displacement coefficient, stiffness and damping constant are identified from the experimental results by the principle of piezoelectric effect and classic...
The problem of actuator hard-nonlinear appears in many practical control systems especially the plant with serious nonlinearity and need run in large rang situations. If the controller is designed only with conventional linearly techniques, the presence of hard-nonlinear can debase the performance even lead the closed-loop system to an unstable behavior. In this paper, neural net-based actuator hard-nonlinear...
In this paper, the fault detection and isolation problems (FDI) of heavy-haul trains equipped with electronically controlled pneumatic (ECP) brake system are studied. A longitudinal dynamical model and the fault modes of trains are considered. A fault detection estimator bases on the nonlinear observer is designed to generate residual for detecting fault. After the fault is detected, a group of fault...
This paper presents a robust adaptive fault estimation design method to solve the problem of actuator fault estimation for CCBII Braking System with disturbances and model uncertainties. The proposed robust adaptive fault estimator which is based on an adaptive observer can improve the speed of fault estimation. By transforming the system model into a special coordinate basis (SCB) form, we can structure...
This paper is concerned with the robust adaptive H∞ fault-tolerant control problem for linear systems with the mismatched parameter uncertainties, input channel and external disturbances, and actuator faults including loss of effectiveness, outage and stuck. Without requiring any fault detection and isolation mechanism, a novel adaptation law with a rather simpler structure is employed to estimate...
In this paper, the finite-time fault tolerant control (FTC) of attitude stabilization is developed for attitude dynamical system of a hypersonic unmanned aerial vehicle (UAV) with actuator loss-of-effectiveness (LOE) fault. First, the hypersonic UAV non-linear attitude dynamics are described. A finite-time controller is designed on the basis of nonsingular terminal sliding mode (NTSM) control technique...
This work investigates the cooperative controller design problem for multi-agent systems in the presence of actuator failures. We first provide an actuator fault detection algorithm. Then, a robust fault-tolerant protocol is presented to achieve the synchronization and tracking control of multi-agent systems. The controllers are locally distributed in the sense that the controller designed for each...
In this paper, the set invariance condition and disturbance rejection problem of actuator saturation linear systems with disturbance are discussed. Under the control of linear state feedback, the new set invariance condition and new optimal approach to enlarge the invariant ellipsoid are given by using composite quadratic Lyapunov functions method. It is proved that the convex hull of some invariant...
Predictive control based on mixed logical dynamical (MLD) model can be used as control strategy for hybrid systems effectively. Active fault tolerant control can safeguard the systems running normally, in the case of the damage of the part components in the systems. In this paper, active fault tolerant control based on MLD model is researched with actuator fault. Active fault tolerant control scheme...
The singular networked control systems with networked-induced delay and data packet dropout are analyzed. Under the condition that the sensor, controller and actuator are time-driven, a singular networked control system model with data packet loss is established. In addition, based on Lyapunov function and LMI technique, a controller design method is provided under which closed-loop networked control...
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