The stability of a four-wheel vehicle is an issue widely discussed. As effort to reduce accidents involving vehicles, many studies have been conducted develop control system. So far, all utilize lateral dynamics model as the reference derive desired states. However, defining states using steady-state cornering values may yield instability due changes in tire stiffness. This paper proposes simpl...

This article deals with the observer-based proportional-integral-derivative (PID) security control problem for a kind of linear discrete time-delay systems subject to cyber-attacks. The cyber-attacks, which include both denial-of-service and deception attacks, are allowed be randomly occurring as regulated by two sequences Bernoulli distributed random variables certain probabilities. A novel PI...

Non-linear characteristic of tire forces is the main cause of vehicle lateral dynamics instability, while direct yaw moment control is an effective method to recover the vehicle stability. In this paper, an optimal linear quadratic regulator (LQR) controller for roll-yaw dynamics to articulated heavy vehicles is developed. For this purpose, the equations of motion obtained by the MATLAB sof...

This paper proposes a maiden intelligent controller design that consists of Fuzzy Proportional–Integral–Derivative–Double Derivative (FPIDD2) whose parameters are fine-tuned using the Gradient-Based Optimization algorithm (GBO). The proposed FPIDD2 regulator is employed as secondary for stabilizing combined voltage and frequency loops in two-area interconnected power system. It has been shown G...

This paper presents a self-tuning optimal PI (Proportional-Integral) rate controller for end-to-end congestion in the IP-based Internet. We employ LQR (Linear Quadratic Regulator) approach from modern control theory in the optimal controller design that would allow the user to achieve good transient performance of IP networks by selecting proper positive definite matrices Q and R. Self-tuning P...

We study a R 2 model of gravity with torsion in a closed Friedmann-Robertson-Walker universe. The model is cast in Hamiltonian form subtracting from the original Lagrangian the total time derivative of f K f R , where f K is proportional to the trace of the extrinsic curvature tensor, and f R is obtained differentiating the Lagrangian with respect to the highest derivative. Torsion is found to ...

This paper presents the optimal regulator for a linear system with state delay and a quadratic criterion. The optimal regulator equations are obtained using the maximum principle. Performance of the obtained optimal regulator is verified in the illustrative example against the best linear regulator available for linear systems without delays. Simulation graphs demonstrating better performance o...