{"title":"Generalized circular impact time guidance","authors":"","doi":"10.1016/j.ast.2024.109543","DOIUrl":null,"url":null,"abstract":"<div><p>To effectively control impact time and ensure terminal acceleration converges to zero under the look angle constraint, this paper proposes a generalized circular impact time guidance law, providing a deeper insight into circular guidance. The proposed guidance law is formulated based on a generalized circular guidance equation that offers an explicit solution for the time to go. The convergence of both miss-distance and terminal acceleration to zero is proven using Bernoulli number theory. Impact time control is achieved by employing a fixed-time convergent controller that guides the look angle to track desired values. Additionally, the look angle constraint is addressed by incorporating a well-designed function into the acceleration. The proposed guidance law does not require estimated time to go and small-angle assumptions for its implementation. By predicting the mean speed, the proposed guidance law remains valid for missiles with varying speeds. Furthermore, the planar results are extended to three-dimensional scenarios by adopting the concept of the engagement plane. Nonlinear simulations demonstrate the effectiveness, advantages, and robustness of the proposed guidance law in the presence of disturbances and autopilot lag.</p></div>","PeriodicalId":50955,"journal":{"name":"Aerospace Science and Technology","volume":null,"pages":null},"PeriodicalIF":5.0000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aerospace Science and Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1270963824006734","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, AEROSPACE","Score":null,"Total":0}
引用次数: 0
Abstract
To effectively control impact time and ensure terminal acceleration converges to zero under the look angle constraint, this paper proposes a generalized circular impact time guidance law, providing a deeper insight into circular guidance. The proposed guidance law is formulated based on a generalized circular guidance equation that offers an explicit solution for the time to go. The convergence of both miss-distance and terminal acceleration to zero is proven using Bernoulli number theory. Impact time control is achieved by employing a fixed-time convergent controller that guides the look angle to track desired values. Additionally, the look angle constraint is addressed by incorporating a well-designed function into the acceleration. The proposed guidance law does not require estimated time to go and small-angle assumptions for its implementation. By predicting the mean speed, the proposed guidance law remains valid for missiles with varying speeds. Furthermore, the planar results are extended to three-dimensional scenarios by adopting the concept of the engagement plane. Nonlinear simulations demonstrate the effectiveness, advantages, and robustness of the proposed guidance law in the presence of disturbances and autopilot lag.
期刊介绍:
Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to:
• The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites
• The control of their environment
• The study of various systems they are involved in, as supports or as targets.
Authors are invited to submit papers on new advances in the following topics to aerospace applications:
• Fluid dynamics
• Energetics and propulsion
• Materials and structures
• Flight mechanics
• Navigation, guidance and control
• Acoustics
• Optics
• Electromagnetism and radar
• Signal and image processing
• Information processing
• Data fusion
• Decision aid
• Human behaviour
• Robotics and intelligent systems
• Complex system engineering.
Etc.