Initial trajectory design of low-thrust spacecraft considering attitude constraints.

Sci Rep

Shanghai Academy of Spaceflight Technology, Shanghai, 200000, China.

Published: August 2024

The fuel carried by deep space exploration spacecraft is crucial for the completion of their exploration missions, and the fuel for attitude control engines is even more precious. In order to reduce the control requirements for attitude control systems, this paper proposes a shape-based trajectory optimization algorithm that considers attitude constraints for low-thrust spacecraft. This method obtains a more accurate transfer trajectory by considering the change rate and change range constraints of the propulsion acceleration direction of spacecraft. By comparing the simulation results without considering spacecraft attitude constraints, it is confirmed that the proposed algorithm considering attitude constraints is very important for the initial design of transfer trajectories. This is of great significance for high-precision initial trajectory optimization of deep space exploration missions.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11364530PMC
http://dx.doi.org/10.1038/s41598-024-70830-8DOI Listing

Publication Analysis

Top Keywords

attitude constraints
16
initial trajectory
8
low-thrust spacecraft
8
considering attitude
8
deep space
8
space exploration
8
exploration missions
8
attitude control
8
trajectory optimization
8
attitude
6

Similar Publications

Interventions to improve quality of life and knowledge in Hypersensitivity Pneumonitis, a survey of clinician practices and perspectives.

CHEST Pulm

December 2024

Division of General Internal Medicine, Department of Medicine, Weill Cornell Medicine, New York, NY, United States.

Article Synopsis
  • The study explores the current practices and attitudes of interstitial lung disease (ILD) clinicians towards improving health-related quality of life (HRQOL) for patients with Hypersensitivity Pneumonitis (HP).
  • Nearly all respondents (100%) believe that interventions to enhance HRQOL are essential, but only 5% currently use validated HRQOL assessment tools.
  • Most clinicians reported limited knowledge of behavioral interventions, such as peer coaching and cognitive behavioral therapy (CBT), yet a significant majority expressed a desire to educate patients about these methods and reinforce them post-treatment.
View Article and Find Full Text PDF

Self-other differences in the perceived authenticity of attitudes expressed toward social groups.

Front Psychol

December 2024

CICPSI, Faculdade de Psicologia, Universidade de Lisboa, Lisbon, Portugal.

We assessed the perceived authenticity of attitudes expressed toward several social groups as a function of whether those attitudes were expressed by the self or by other people, and whether those expressions were automatic (without time to ponder) or controlled (without time constraints). Participants considered their controlled responses more authentic than their automatic responses. However, the same did not happen when considering others' attitudes.

View Article and Find Full Text PDF

Food for thought: a qualitative assessment of medical trainee and faculty perceptions of nutrition education.

BMC Med Educ

December 2024

Department of Medical Education, Geisinger Commonwealth School of Medicine, Geisinger College of Health Sciences, 525 Pine Street, Scranton, PA, 18509, USA.

Background: The American Society of Clinical Nutrition recommends 37 to 44 h of undergraduate medical nutrition education. The Total Health Curriculum at Geisinger Commonwealth School of Medicine (GCSOM) contains 14 h of objective-based nutritional instruction. This study aimed to examine the perceptions of key stakeholders regarding the role of nutrition in medicine and to identify barriers, opportunities for improvement, and roles/responsibilities for innovative implementation of nutrition education.

View Article and Find Full Text PDF

Care delivery in the context of district mental healthcare plans in Ghana: a qualitative study exploring experiences of primary healthcare workers and service users.

BMJ Open

December 2024

Centre for Global Mental Health, Health Service and Population Research Department, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, London, UK.

Objective: To explore the perceptions and experiences of mental health service users and healthcare workers regarding the implementation of district mental healthcare plans (DMHPs) in three district demonstration sites in Ghana.

Design: The study employed a qualitative design using reflexive thematic analysis. Interview data were analysed by combining inductive and deductive approaches.

View Article and Find Full Text PDF

Artificial Intelligence and Modern Technology in Dentistry: Attitudes, Knowledge, Use, and Barriers Among Dentists in Croatia-A Survey-Based Study.

Clin Pract

December 2024

Department of Restorative Dental Medicine and Endodontics, Study of Dental Medicine, School of Medicine, University of Split, 21000 Split, Croatia.

Aim: This study aims to assess Croatian dentists' knowledge, attitudes, and use of artificial intelligence (AI) and modern technology, while also identifying perceived barriers to AI and modern technology adoption and evaluating the need for further education and training.

Materials And Methods: A cross-sectional survey was conducted in February 2024 among general dentists in Croatia using a self-structured questionnaire. A total of 200 respondents filled out the questionnaire.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!