Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Rongjun Mu"'
Publikováno v:
Symmetry, Vol 15, Iss 8, p 1549 (2023)
The solar sail spacecraft utilizing a hybrid approach of solar sail and solar electric propulsion in the heliocentric displaced orbit is affected by external disturbances, internal unmodeled dynamics, initial injection errors, and input saturation. T
Externí odkaz:
https://doaj.org/article/4b01e3fda9644723ac3c5d475c117035
Publikováno v:
Aerospace, Vol 10, Iss 7, p 634 (2023)
In this paper, a novel guidance algorithm based on adaptive convex optimization is proposed to ensure robustness in the uncertainty of a lunar lander’s parameters and satisfy the constraints of terminal position, velocity, attitude, and thrust. To
Externí odkaz:
https://doaj.org/article/2569f535e48943318d9cea53653abc11
Autor:
Tengfei Zhang, Rongjun Mu
Publikováno v:
Aerospace, Vol 10, Iss 7, p 606 (2023)
To deal with the attitude tracking control problem of a struck or pierced geocentric polar displaced solar sail (GPDSS), an attitude adaptive control strategy is proposed in this paper under the complex conditions of unknown inertial parameters, exte
Externí odkaz:
https://doaj.org/article/8850327d96e740afb8aa1801a80e72a5
Publikováno v:
IEEE Access, Vol 8, Pp 118853-118868 (2020)
This paper develops a novel nonlinear adaptive robust filter called the multiple-step randomly delayed variational Bayesian adaptive high-degree cubature Huber-based filter (MRD-VBAHCHF) for a class of nonlinear stochastic systems whose measurements
Externí odkaz:
https://doaj.org/article/3504a720888841d6a598a714eb827116
Publikováno v:
International Journal of Aerospace Engineering, Vol 2022 (2022)
During emergency return or mission change, the boost-glide vehicle needs to meet the nonregular reachable area constraints (NRACs). Therefore, this paper introduced NRACs into boost-phase trajectory planning to extend the maneuvering range and enhanc
Externí odkaz:
https://doaj.org/article/3ca1c4d99c1b441f92549dea70de8a92
Publikováno v:
International Journal of Aerospace Engineering, Vol 2022 (2022)
For future lunar exploration and planetary missions, the digital elevation model (DEM) of the target object may not be well prepared before the mission, so developing a new robust crater detection algorithm (CDA) without prepared high-precision DEM i
Externí odkaz:
https://doaj.org/article/31fc6dce6b82481883ccbb6f2d4f9778
Publikováno v:
Aerospace, Vol 10, Iss 3, p 289 (2023)
This study is focused on addressing the problem of delayed measurements and contaminated Gaussian distributions in navigation systems, which both have a tremendous deleterious effect on the performance of the traditional Kalman filtering. We propose
Externí odkaz:
https://doaj.org/article/1e3df879eebe4b7baa63d2bcdf57c5b1
Publikováno v:
Sensors, Vol 23, Iss 1, p 339 (2022)
To reduce the impact of offshore launching platform motion and swaying on the self-alignment accuracy of a launch vehicle, a rapid self-alignment strategy, which involves an optimal combination of anti-swaying coarse alignment (ASCA), backtracking na
Externí odkaz:
https://doaj.org/article/b0cd2921da854c3e82550472b25a20ad
Publikováno v:
IEEE Access, Vol 7, Pp 37371-37380 (2019)
In this paper, an improved extended state observer (ESO) based on sigmoid function and a finite-time convergence attitude controller are designed for reusable launch vehicle (RLV) in the re-entry phase. First, a control-oriented model (COM) of the RL
Externí odkaz:
https://doaj.org/article/1a2f01a398204d3d9eea247792a8ab16
Publikováno v:
Aerospace, Vol 9, Iss 9, p 496 (2022)
To solve the problem of high-precision optical navigation for the descent landing of lunar and planetary probes, an optical navigation method based on the spatial position distribution model is proposed. The method is based on crater detection, and a
Externí odkaz:
https://doaj.org/article/c3c951c40f77400b9d89ead2bc95d12b