Results 261 to 270 of about 91,489 (305)
Some of the next articles are maybe not open access.
Optimal thrust allocation for marine vessels
Control Engineering Practice, 1997Abstract This paper presents a new thrust-allocation scheme which significantly reduces the fuel consumption for dynamic positioning of ships when rotatable azimuth thrusters are used. Thrust allocation is the problem of determining the thrust and the direction of each of the n thruster devices of a ship, given the desired forces and moment from the ...
openaire +1 more source
Thrust allocation logic of dynamically positioned offshore vessel
Ships and Offshore Structures, 2010In dynamic positioning (DP) systems, ‘thrust allocation’ is the problem of determining the thrust and direction of each of the ‘n’ thrusters in an over-actuated offshore vessel from the desired forces and moment derived in the control law. This is formulated as a non-linear optimisation problem, where the objective is to minimise the use of control ...
Ramamoorthy Jeyasenthil +1 more
openaire +1 more source
Direct thrust allocation algorithm based on optimal feasible cone
2011 International Conference on Electrical and Control Engineering, 2011A direct thrust allocation algorithm based on the searching of the optimal feasible cone is proposed to reduce the online computation load. The algorithm first concentrates on finding an optimal feasible cone for the unconstrained allocation problem.
Mengping Zhu, Shijie Xu
openaire +1 more source
Hexacopter fault tolerant actuator allocation analysis for optimal thrust
2017 International Conference on Unmanned Aircraft Systems (ICUAS), 2017Recently, it was shown that an hexagon shaped hexarotor vehicle with tilted rotors, is capable of fault tolerant attitude and altitude control. In this work, we propose a strategy to select the signals commanded to each rotor in order to achieve a desired torque and vertical force.
Claudio D. Pose +2 more
openaire +1 more source
Optimized allocation control system design of multi-thrust aerostat
Proceedings of the 33rd Chinese Control Conference, 2014Based on the model of four-propeller aerostat prototype, this paper designed a multi-propeller control system. Two control strategies are presented: the former designed PID anti-windup feedback controller and realized multi-propeller thrust allocation with pseudo-inverse algorithm on nonlinear system model, whereas the latter designed state feedback ...
Liming Wei, Dan Huang, Li Chen
openaire +1 more source
Full Scale Sea Trials with Optimal Thrust Allocation
IFAC Proceedings Volumes, 1997Abstract Thrust allocation for ship control like dynamic positioning is the problem of determining the thrust and the direction of each of the n thruster devices of a ship given the desired forces and moment from the control law. This paper presents full scale sea trials with a thrust allocation scheme that avoids problems with singular aziumuth ...
openaire +1 more source
Optimal Thrust Allocation for Ship Dynamic Positioning System
2017The thrust allocation of a ship dynamic positioning system allocates the desired forces to thrusters by calculating thrust and angle of each thruster. Due to the problem of allocation failure arising from the thrust optimization allocation algorithm in the situation of the desired forces caused mutation, this paper puts forward the method based on the ...
Wenjuan Li +3 more
openaire +1 more source
Optimal thrust allocation based GA for dynamic positioning ship
2010 IEEE International Conference on Mechatronics and Automation, 2010Thrust allocation is an important part of the dynamic positioning system, which determining the thrust and the direction of each of the thruster devices from the control law. This paper proposes a rational and effective method of solving thrust allocation to the semi-submersible rig based on the adaptive genetic algorithm.
Da-wei Zhao +3 more
openaire +1 more source
Dynamic positioning operability assessment by using thrust allocation optimization
2022A Dynamic Positioning system can automatically maintain both the position and heading of a vessel by using its thrusters. The core is composed of force and thrust allocation modules that tailor the required forces and moment to compensate the external forces over the available actuators.
C. Fruzzetti +3 more
openaire +1 more source
Energy-efficient optimal thrust allocation for spherical underwater robot
2013 IEEE International Symposium on Industrial Electronics, 2013In this paper, a spherical underwater robot uses optimal thrust allocator to determine the magnitude and the direction of thrust required for each water-jetted bilge pump thruster to create force and moment equilibrium. However, in order to ensure safe operation of the underwater robot it is equipped with redundant thruster configuration and therefore ...
Bhuneshwar Prasad +5 more
openaire +1 more source