With the characteristics of input nonlinearity, time-varying parameters and the couplings between main and tail rotor, it is difficult for the yaw dynamics of Rotorcraft to realize good tracking performance while maintaining stability and robustness simultaneously. In this paper, a new kind of robust controller design strategy based on active modeling technique is proposed to attenuate the unce...

Smaller autonomous underwater vehicles that use differential thrust for surge and yaw motion control has the advantage of low cost and, at the same time, increased ma­ neuverability in yaw direction. However, since such vehicles are underactuated vehicles, design of an autonomous control system that enables the vehicle to autonomously track a predefined trajectory is challenging. In this paper,...

This paper presented a new method for four wheel in-wheel-motored electric vehicle to improve handling and stability with the help of sideslip angle observer and braking force distribution. The first part of this study deals with the full description of the basic theory of vehicle dynamic control system. After that four wheels in-wheel-motored electric vehicle dynamics model, as well as desired...

This paper explores the feasibility of roll–pitch–yaw integrated autopilots for a high angle-of-attack missile. Investigation of the aerodynamic characteristics indicates strong cross-coupling effects between the motions in longitudinal and lateral directions. Robust control techniques based on H1 synthesis are employed to design roll– pitch–yaw integrated autopilots. The performance of the pro...

Abstract In this literature, guidance and control laws using a basic control system have been proposed for analyses and designs of a Quadrotor. The basic control system includes: (a)height Control system using velocity stabilizing in the inner loop; (b)roll, pitch and yaw attitude control systems using angular rate stabilizing in inner loops. Base upon the basic control system, the B X and B Y ...

In this paper, an antilock–antiskid braking system controller, which has been designed for stability enhancement of vehicles during braking and turning, is presented. Using available signals, a novel structure is proposed for vehicle stability improvement for critical driving conditions such as braking on slippery or μ-split road surfaces. In conventional vehicles, undesired lane changes may oc...

Occurrence and features of parametric roll (PR) on a weather-vaning floating production storage and offloading (FPSO) platform with a turret single-point mooring-line system are examined. The main focus is on the relevance of motions coupling and nonlinear effects on this phenomenon and on more general unstable conditions as well as on the occurrence and severity of water on deck. This work was...

In this paper, we will present our work towards designing a control strategy to mitigate wind turbine wake effects by redirecting the wakes, specifically applied to the Fishermen’s Atlantic City Windfarm, proposed for deployment within the next few years off the shore of Atlantic City, New Jersey. As wind turbines extract energy from the air, they create low-speed wakes that extend behind them....

Current and conventional pose (position orientation) control of a small underwater vehicle is achieved by using rudders (yaw motion control) elevators (pitch control), but these suffer from non-linear, indirect complex issues. This paper proposes an innovative mechanism for vehicles. The mass shifter designed fabricated to pitch yaw with single propeller only. center the altered moving pair cou...