Robust Optimal Guidance Algorithm for Required Time of Arrival Operations Using Probabilistic Weather Forecasts

2019 ◽  
Author(s):  
Yoshinori Matsuno ◽  
Ryota Kikuchi ◽  
Naoki Matayoshi
Keyword(s):  
Time Of Arrival ◽  
Weather Forecasts ◽  
Optimal Guidance ◽  
Guidance Algorithm ◽  
Required Time Of Arrival

Pursuing Forecasts of the Behavior and Arrival of Coronal Mass Ejections through Modeling and Observations

2017 ◽  
Vol 13 (S335) ◽  
pp. 58-64 ◽  
Author(s):  
Hebe Cremades
Keyword(s):  
Remote Sensing ◽  
Coronal Mass Ejections ◽  
Empirical Models ◽  
Time Of Arrival ◽  
Data Sets ◽  
Radio Waves ◽  
Weather Forecasts ◽  
The Past ◽  
Increasing Demand ◽  
Solar Disturbances

AbstractSophisticated instrumentation dedicated to studying and monitoring our Sun’s activity has proliferated in the past few decades, together with the increasing demand of specialized space weather forecasts that address the needs of commercial and government systems. As a result, theoretical and empirical models and techniques of increasing complexity have been developed, aimed at forecasting the occurrence of solar disturbances, their evolution, and time of arrival to Earth. Here we will review groundbreaking and recent methods to predict the propagation and evolution of coronal mass ejections and their driven shocks. The methods rely on a wealth of data sets provided by ground- and space-based observatories, involving remote-sensing observations of the corona and the heliosphere, as well as detections of radio waves.

State-of-the-Art Within Ship Weather Routing

2015 ◽  
Author(s):  
Martin Hjorth Simonsen ◽  
Erik Larsson ◽  
Wengang Mao ◽  
Jonas W. Ringsberg
Keyword(s):  
Optimization Algorithm ◽  
State Of The Art ◽  
Public Awareness ◽  
Time Of Arrival ◽  
Specific Response ◽  
Weather Forecasts ◽  
Fuel Prices ◽  
Expected Time ◽  
Weather Routing ◽  
Response Information

Increased fuel prices and public awareness of environment impacts from shipping have attracted large efforts in maritime sector to increase its energy efficiency as a factor of competitiveness. Weather routing has become a recognized measure, which can partly help to achieve the targets as well as enhancing safety. A routing system requires a reliable optimization algorithm to consider a ship’s operational costs, expected time of arrival, and cargo safety etc. simultaneously. Hence, the service provided by a weather routing system is highly dependent on a properly selected optimization algorithm and associated input parameters. In this paper the concept of weather routing is broken down into many elements for further analysis. Focus is given to algorithms, constraints and weather forecasts used in the optimized routing plan. Two different aspects of state-of-the-art have been considered. The first is a study of software already in use and the second is a study of methods investigated in the research community. Furthermore, this paper also provides examples of development trends, for example the fatigue based routing, and the risk based routing, as well as its integration with onboard monitoring systems for more reliable weather and ship specific response information.

scholarly journals Optimal Aerial Guidance in General Wind Fields

2020 ◽  
Author(s):  
Ely Paiva ◽  
Guilherme Pereira
Keyword(s):  
Analytical Solution ◽  
Minimum Principle ◽  
Wind Fields ◽  
Control Effort ◽  
Optimal Guidance ◽  
Guidance Algorithm ◽  
Point To Point ◽  
Iterative Procedures ◽  
Derivatives Of ◽  
Wind Perturbation

<div>This paper presents an optimal guidance approach</div><div>for a UAV point-to-point navigation in 2D, under wind perturbation, with a general desired airspeed profile. A cost function weighting the travel time and the control effort is minimized through the Pontryagin’s Minimum Principle, involving the derivatives of the airspeed velocities. Two iterative procedures for a guidance algorithm under general wind fields were developed, including an analytical solution for the optimal heading in minimum-time paths. Different cases from the literature are compared and a hard wind scenario test is presented.</div>

Optimization of aerospace aircraft guidance to the landing area

2021 ◽  
Author(s):  
A.Yu. Melnikov ◽  
S.N. Ilukhin
Keyword(s):  
Maximum Principle ◽  
Boundary Value ◽  
Flight Simulation ◽  
Motion Model ◽  
Algorithm Efficiency ◽  
Simulation Procedure ◽  
Optimal Guidance ◽  
Guidance Algorithm ◽  
The Pontryagin Maximum Principle ◽  
Significant Factors

The article considers a technique for constructing an optimal guidance procedure for an aerospace aircraft. The technique is based on the adaptation of the Pontryagin maximum principle for the considered class of problems. At the same time the guidance accuracy is ensured by solving a boundary value problem, which is periodically performed during the flight. The developed procedure for predicting the final parameters of the optimal flight according to a simplified motion model is presented, which also makes it possible to determine the value of the actual miss. A detailed mathematical description of the proposed technique is given. The feasibility of the proposed technique is ensured by minimizing the amount of computational operations. The guidance algorithm efficiency is illustrated by a numerical example with a flight simulation procedure taking into account all significant factors. The paper also provides examples of solving boundary value problems and the results of modeling the optimal guidance.

Particle Swarm Optimization with Required Time of Arrival Constraint for Aircraft Trajectory

2020 ◽  
Vol 13 (2) ◽  
pp. 269-291
Author(s):  
Alejandro Murrieta Mendoza ◽  
Ruxandra Mihaela Botez ◽  
Hugo Ruiz ◽  
Sonya Kessaci
Keyword(s):  
Particle Swarm Optimization ◽  
Particle Swarm ◽  
Time Of Arrival ◽  
Swarm Optimization ◽  
Aircraft Trajectory ◽  
Required Time Of Arrival
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