Results 31 to 40 of about 20,487,627 (154)
Advances in Astronomy, 2017 Keeping the flying formation of spacecraft is a key problem which needs to be solved in deep space exploration missions. In this paper, the nonlinear dynamic model of formation flying is established and a series of transformations are carried out on this
He Zhenqi, Zhang Ke, Lv Meibai
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Using PID Controller and SDRE methods for tracking control of Spacecrafts in Closed-Rendezvous Process [PDF]
INCAS Bulletin, 2019 Rendezvous process of spacecrafts is one of major issues in study of aerospace engineering. Tracking control in Rendezvous process is very complex due to the need to fulfill the conditions and constraints to determine the control forces to bring Chaser ...
Thien Van NGUYEN +3 more
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Control Design for Dengue Fever Model with Disturbance
Communication in Biomathematical Sciences, 2023 A mathematical model has become a useful tool to predict and control dengue fever dynamics. In reality, the dynamic of dengue fever transmission can be disturbed by uncertainty measurements, so it is needed to consider the disturbance in the model. Then,
Hanna Hilyati Aulia +2 more
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Shock and Vibration, Volume 2020, Issue 1, 2020., 2020 In this paper, we investigate the mechanism of atomic force microscopy in tapping mode (AFM‐TM) under the Casimir and van der Waals (VdW) forces. The dynamic behavior of the system is analyzed through a nonlinear dimensionless mathematical model. Numerical tools as Poincaré maps, Lyapunov exponents, and bifurcation diagrams are accounted for the ...
Mauricio A. Ribeiro +5 more
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Attitude Control of Spacecraft by State Dependent Riccati Equation and Power Series Expansion of Riccati Methods [PDF]
فصلنامه علوم و فناوری فضایی, 2015 Attitude control of spacecraft in order to nonlinear and high order dynamics is fundamental and challenging issue. With respect to these nonlinearities, linear control theories are not suitable choices and spacecraft may be unstable or lose performance ...
M. Navabi, M. Tavana, H.R. Mirzaei
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International Journal of Aerospace Engineering, 2014 This paper presents an efficient online technique used for finite-horizon, nonlinear, stochastic, regulator, and tracking problems. This can be accomplished by the integration of the differential SDRE filter algorithm and the finite-horizon state ...
Ahmed Khamis +2 more
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Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 We studied the chaotic peculiarities of magnetic‐mechanical coupled system of GMA. Based on the working principle of GMA and according to Newton’s second law of motion, first piezomagnetic equation, disk spring design theory, and structural dynamics principle of GMA, the present study established a GMA magnetic‐mechanical coupled system model.
Hongbo Yan +5 more
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Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 In this paper, a suboptimal state feedback integral decentralized tracking control synthesis for interconnected linear time‐variant systems is proposed by using orthogonal polynomials. Particularly, the use of operational matrices allows, by expanding the subsystem input states and outputs over a shifted Legendre polynomial basis, the conversion of ...
Mohamed Sadok Attia +3 more
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On solving periodic Riccati equations [PDF]
, 2008 Numerically reliable algorithms to compute the periodic non-negative definite stabilizing solutions of the periodic differential Riccati equation (PRDE) and discrete-time periodic Riccati equation (DPRE) are proposed. For the numerical solution of PRDEs,
A. Varga, Varga, Andreas
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IEEE Access, 2019 This paper proposes a simplified near optimal control (NOC) scheme to reject the disturbances of interior permanent magnet synchronous motor (IPMSM) drives by minimizing the complex calculations in the Taylor series method required for solving the state ...
Muhammad Saad Rafaq +3 more
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