Article
Engineering, Aerospace
Jean-Marc Salotti, Julien Doche
Summary: Entry, descent and landing (EDL) is the most difficult and risky phase of a human mission to Mars. Having backup options during the final phase of EDL can help mitigate risks and improve the chances of mission success.
Article
Engineering, Aerospace
Pengyu Wang, Yanning Guo, Guangfu Ma, Bong Wie
Summary: This study introduces a new feedback guidance strategy for Mars precision landing, showcasing its robustness and efficiency under various constraints.
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
(2021)
Article
Engineering, Aerospace
Sixiong You, Changhuang Wan, Ran Dai, Jeremy R. Rea
Summary: This paper investigates the end-to-end human-Mars entry, powered-descent, and landing (EDL) guidance problem by developing an on-board learning-based optimal control method. The method includes solving a multi-phase optimal control problem using an alternating direction method of multipliers and generating real-time optimal guidance commands using deep neural networks. The proposed method is effective and efficient, as verified through extensive simulation cases.
Article
Engineering, Aerospace
Ashley M. Korzun, Robert W. Maddock, Mark Schoenenberger, Karl T. Edquist, Carlie H. Zumwalt, Christopher D. Karlgaard
Summary: The InSight mission successfully landed on Mars in 2018, inheriting the Phoenix landing system and exhibiting similar behavior in trim attitude and roll reversal, but with more severe outcomes.
JOURNAL OF SPACECRAFT AND ROCKETS
(2021)
Article
Engineering, Aerospace
Ian G. Clark, Clara O'Farrell, Christopher D. Karlgaard
Summary: This paper describes the reconstructed performance of the supersonic parachute of InSight on Mars. The reconstruction results were compared against preflight predictions, showing that the vehicle trimmed in a lift-down orientation during entry, leading to parachute deployment conditions that diverged from the nominal preflight predictions.
JOURNAL OF SPACECRAFT AND ROCKETS
(2021)
Article
Engineering, Aerospace
Changhuang Wan, Gangshan Jing, Ran Dai, Jeremy R. Rea
Summary: This article investigates the fuel-optimal guidance problem of the end-to-end human-Mars entry, powered-descent, and landing (EDL) mission. It applies a unified modeling scheme and develops a computationally efficient new optimization algorithm to solve the multiphase optimal guidance problem.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Environmental Sciences
Shaojie Qu, Bo Li, Jiang Zhang, Yi Wang, Chenfan Li, Yuzhou Zhu, Zongcheng Ling, Shengbo Chen
Summary: China's first Mars exploration mission, Tianwen-1, aimed to orbit, land, and rove on Mars. This study assessed atmospheric risk for the landing process by analyzing dust storm activities and successfully determined the landing time and location based on the observations.
Article
Engineering, Multidisciplinary
Wei-Feng Xia, M. Ijaz Khan, Sami Ullah Khan, Faisal Shah, M. Imran Khan
Summary: Due to improved thermophysical properties, nanofluids have diverse applications in industries, engineering, and biomedicine. Analysis of viscous nanofluid flow over a vertical plate subject to magnetic force reveals variations in velocity, temperature, and concentration distributions under different parameters.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Engineering, Aerospace
Christopher D. Karlgaard, Ashley M. Korzun, Mark Schoenenberger, Eugene P. Bonfiglio, David M. Kass, Myron R. Grover
Summary: This paper describes the reconstruction of the InSight mission's entry, descent, and landing trajectory on Mars, finding that the reconstructed atmospheric density was approximately 1 sigma smaller than the preflight atmosphere model, and the aerodynamic lift direction was downward, leading to high deceleration and the landing site being off target.
JOURNAL OF SPACECRAFT AND ROCKETS
(2021)
Article
Engineering, Aerospace
Xinli Li, Yansong Li, Dayong Hu, Wei Rao, Yufeng Qi, Qiang Yang, Gang Wang
Summary: A deployable trim flap system was proposed to meet the aerodynamics requirement of the Tianwen-1 Mars probe, providing a mass-saving alternative. The theoretical and finite element models were established to predict and evaluate the deployment performance, and a full-scale physical prototype was manufactured for experiments. The results showed good agreement between the predicted performance and the experimental results.
Article
Automation & Control Systems
Jianwei Xu, Xiang Yu, Jianzhong Qiao
Summary: This paper proposes a hybrid anti-disturbance composite control scheme, employing a hybrid disturbance observer and H∞ technique to address external disturbances and actuator discrete dynamics, ensuring precise execution of the entire hybrid system, with stability analysis of the continuous-discrete control system.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2021)
Article
Thermodynamics
Miguel Chen Austin, Tingting Vogt Wu, Alain Sempey, Alain Sommier, Jean Dumoulin, Denis Bruneau, Jean-Christophe Batsale, Yingying Yang
Summary: The study proposed a methodology using thermoelectric modules as an alternative to conventional heat flux sensors for estimating convective and radiative heat flux. Experimental comparison shows that the convective part measured by TEM is significantly larger than that measured by HFS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Engineering, Aerospace
Alberto Fedele, Sanny Omar, Stefania Cantoni, Raffaele Savino, Riccardo Bevilacqua
Summary: The article proposes a new technological solution for re-entering and landing a spacecraft in a desired location from a low Earth orbit using exclusively aerodynamic drag and eliminating the need for chemical propulsion. The solution involves an iterative procedure to compute the desired state at the re-entry interface, a re-entry point targeting algorithm, and iterative modifications to correct landing errors.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Engineering, Aerospace
Justin Kerr, John E. Moores, Christina L. Smith
Summary: Solar energy is a crucial power source for Mars surface missions. By utilizing a 1D radiative transfer algorithm, we examine the optimal orientation of static, tilted solar panels on Mars and compare their energy output to sun-tracking panels. Tilted static solar panels can harvest up to 8.5 times more solar energy than horizontally placed panels, depending on location and time of year. Static panels set at optimal angles and azimuths can receive at least 53% of the solar energy available to sun-tracking panels. The polar regions show the most significant benefits from angled and sun-tracking panels.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Mechanics
S. T. Surzhikov, D. S. Yatsukhno
Summary: Numerical investigation on the radiative aerothermodynamics of the Schiaparelli descent space vehicle during its entry into the Martian atmosphere is conducted, and the results show good agreement with flight experiment data.