Positioning systems include different control functions for automatic positioning and guidance of marine vessels by means of proper action of the thruster and propeller devices. These may be controllable pitch propeller (CPP) with fixed speed, controllable speed with fixed pitch propeller (FPP), or controllable pitch and speed in combination. The positioning controller computes commanded forces...

Abstract. This work demonstrates the feasibility of an individual pitch control strategy based on nacelle yaw misalignment measurements to mitigate platform drift in upwind floating offshore wind turbines, which is caused by vertical moment produced rotor. acts degree freedom, being great importance systems that have low stiffness. Among them, single-point-mooring platforms are one most importa...

Aiming at the yaw stability problem of a four-wheel independent-drive electric vehicle (EV) during steering, this paper proposes an adaptive sliding mode control strategy (ASMC) for based on phase plane. The adopts hierarchical control. upper layer is ASMC controllers particle swarm optimization (PSO). chattering controller, approach law designed as law, which changes with change system state b...

This paper presents the aerodynamic modeling of a flying wing featuring Ludwig Prandtl’s bell spanload. The models are developed using medium fidelity vortex-lattice method and Reynolds-Averaged Navier–Stokes computational fluid dynamics solution across wide range in-flow angle conditions. A methodology is to directly compare spanwise force distributions from each method. Excellent agreement se...

Bumblebee foragers spend a significant portion of their lives transporting nectar and pollen, often carrying loads equivalent to more than half their body mass. Whereas nectar is stored in the abdomen near the bee's center of mass, pollen is carried on the hind legs, farther from the center of mass. We examine how load position changes the rotational moment of inertia in bumblebees and whether ...

In this paper, a torque distribution control for electric vehicles with an in-wheel motor installed each wheel is proposed in order to manage the traction operation of vehicle and avoid slip ratio from reach extreme values while moves into slippery surfaces. The driving force main controller system its consist two loop. PD-Fuzzy logic PI-control are applied as speed inner loop aim improving sta...

In this paper a novel adaptive regenerative braking control concept for electric vehicles with an electric motor at the front axle is presented. It is well known that the “phased” type regenerative braking systems of category B maximize the amount of regenerative energy during braking. However, there is an increased risk of maneuvering capability loss especially during cornering. An integrated ...

This paper presents an acceleration slip regulation strategy for distributed drive electric vehicles with two motors on the front axle. The tasks of the strategy include controlling the slip ratio to make full use of the road grip and controlling the yaw rate to eliminate the lateral movement due to the difference between motor torques. The rate of the slip ratio change can be controlled by con...