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In this paper, the problem of fixed-time stabilization is addressed for a category of chained nonholonomic systems with asymmetric time-varying output constraints. A novel barrier Lyapunov function (UBLF) is introduce to addressed asymmetric time-varying output constraint requirements. Based on this, a state feedback controller is developed by employing switching control technique. The given controller is able to drive the states of the closed-loop system (CLS) to zero in a fixed time without violation of the constraints. Finally, the efficacy of the proposed control scheme is confirmed by simulation results. [ABSTRACT FROM AUTHOR]

This paper addresses the problem of saturated global finite-time stabilization by state feedback for a class of nonlinear systems with upper-triangular structure. By using the homogeneous domination approach and the nested saturation technique, a saturated state feedback controller is successfully constructed to guarantee that states of the closed-loop system are globally finite-time regulated to zero without violation of the input constraint. A simulation example is provided to demonstrate the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR]

The road adhesion coefficient is significant in vehicle safety control systems. The road adhesion coefficient plays a key role in vehicle safety systems. To estimate this parameter, this paper formulates a seven-degree-of-freedom vehicle dynamics model. The normalization of tire force is achieved by integrating the Dugoff tire model. Based on this, an adaptive unscented Kalman filter (AUKF) algorithm is proposed. To reduce the 'non-local effect' in the sampling process, a proportional correction coefficient is used in the unbiased transformation. Additionally, an adaptive coefficient is incorporated into the standard unscented Kalman filter (UKF), and the updated covariance matrix is utilized to dynamically regulate the filtering gain. This enhancement significantly improves the algorithm's adaptability to the evolving states. Joint simulations of various road conditions are conducted using Carsim and Simulink. Experimental results indicate that the proposed adaptive unscented Kalman filter algorithm can reduce computational complexity and improve convergence speed while maintaining algorithm accuracy. [ABSTRACT FROM AUTHOR]

For a category of stochastic nonlinear systems (SNSs), the problem of global finite-time stabilization by output feedback is investigated in this article. By using adding a power integrator and homogeneous domination techniques, a constructive output feedback control design procedure is given for the considered systems. It is proved that, under some essential restriction on the system growth, the control design ensures the closed-loop system (CLS) is globally finite-time stable in probability. Simulation results of a numerical example are given to confirm the effectiveness of the proposed approach. [ABSTRACT FROM AUTHOR]

For a category of stochastic nonlinear systems (SNSs), the problem of global finite-time stabilization by output feedback is investigated in this article. By using adding a power integrator and homogeneous domination techniques, a constructive output feedback control design procedure is given for the considered systems. It is proved that, under some essential restriction on the system growth, the control design ensures the closed-loop system (CLS) is globally finite-time stable in probability. Simulation results of a numerical example are given to confirm the effectiveness of the proposed approach. [ABSTRACT FROM AUTHOR]

This paper addresses the problem of finite-time stabilization by state feedback for a class of uncertain high-order nonholonomic systens in feedforward-like form. Based on the finite-time stability theorem, and by introducing sign function and necessarily modifying the homogeneous domination approach, a constructive design procedure for state feedback control is given. Together with a novel switching control strategy, the designed controller renders that the states of the closed-loop system are regulated to zero in a finite time. A simulation example is provided to illustrate the effectiveness of the proposed approach. [ABSTRACT FROM AUTHOR]

The problem of saturated output feedback stabilization for a class of nonlinear systems with upper-triangular structure is addressed in this paper. By constructing a reduced order observer to estimates the unmeasurable states and by skillfully using the homogeneous domination approach and the nested saturation technique, a saturated output feedback control scheme is successfully developed. It is prove that the proposed controller with appropriate design parameters can render the states of the closed-loop system globally asymptotically to zero without violation of the input constraint. A simulation example is provided to demonstrate the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR]