Dynamics of Space Elevator After Tether Rupture

Aslanov, Vladimir S.; Ledkov, Alexander S.; Misra, A. K.; Guerman, Anna D.

doi:10.2514/1.59378

Cited by 27 publications

(6 citation statements)

References 13 publications

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“…The key parameters are given in Table 2. (26) With the initial estimate of zero control inputs, the Legendre-Gauss-Radau pseudo-spectral method is used for open-loop trajectory optimization. The optimal control inputs become continuous via Lagrange interpolation.…”

Section: Numerical Resultsmentioning

confidence: 99%

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An Effective Approach Control Scheme for the Tethered Space Robot System

Meng

Huang

2014

International Journal of Advanced Robotic Systems

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The tethered space robot system (TSR), which is composed of a platform, a gripper and a space tether, has great potential in future space missions. Given the relative motion among the platform, tether, gripper and the target, an integrated approach model is derived. Then, a novel coordinated approach control scheme is presented, in which the tether tension, thrusters and the reaction wheel are all utilized. It contains the open-loop trajectory optimization, the feedback trajectory control and attitude control. The numerical simulation results show that the rendezvous between TSR and the target can be realized by the proposed coordinated control scheme, and the propellant consumption is efficiently reduced. Moreover, the control scheme performs well in the presence of the initial state's perturbations, actuator characteristics and sensor errors.

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Section: Numerical Resultsmentioning

confidence: 99%

“…The former is the finite element model and the latter is the most popular bead model. [17][18][19]26,27] In this model, the tether mass elasticity and flexibility are all considered. The tether is more realistically represented by increasing the element number.…”

Section: Description Of Tsrmentioning

confidence: 99%

An Effective Approach Control Scheme for the Tethered Space Robot System

Meng

Huang

2014

International Journal of Advanced Robotic Systems

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“…As the lower portion falls to the Earth, it will pick up great speed due to the lack of air resistance above the atmosphere, while portions in the atmosphere will be slowed down by air resistance. Computer modeling of this complex dynamic suggests that areas East of the anchor point may be in danger from high-speed tether impacts (Aslanov et al 2013). A self-destruct capability that breaks the tether into smaller, more manageable lengths could therefore be considered to prevent pieces of the tether from striking the ground at high speed.…”

Section: Technical Challengesmentioning

confidence: 99%

International opportunities and technical challenges for the space elevator

Johnson

2023

JSPG

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The space elevator is a hypothetical concept for placing satellites in orbit around Earth that would result in dramatic cost savings over traditional rocket launches. The space elevator would work by placing a counterweight in space that is tethered to the Earth's surface and held in place by the centrifugal force of the Earth's rotation. Technical challenges, particularly those related to the tether material, have prevented a space elevator from getting past the design stage. Should future advances in materials science allow the space elevator to be built, consideration should be paid to the geopolitical influence that a real space elevator might have. Its unique combination of cost, wartime utility, and vulnerability mean that a peaceful consortium of nations working together should be considered as a potential management model.

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“…Takeichi [11] and Tao et al [12] analyzed the behavior of tether deployment during construction. Aslanov et al [13] proposed a simulation method for the tether rupture behavior. In particular, the tether motion during climber ascent should be analyzed to validate the system feasibility and design the maximum payload and operating speed of space elevators.…”

Section: ) Analysis Of Tether Dynamics In Spacementioning

confidence: 99%

Dynamics and Energy Analysis of Nonequatorial Space Elevator Using Three-Dimensional Nonlinear Finite Element Method Extended to Noninertial Coordinate System

et al. 2022

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A space elevator is a futuristic space transportation technology that enables low-cost and versatile payload transportation using climbers on a tether deployed from the geostationary orbit (GEO). In particular, a nonequatorial space elevator, which contains an anchor in a region with latitudes on the Earth, has recently attracted attention. It has several advantages, such as extending the construction range and avoiding collisions with spacecraft in the GEO. Prior research has focused on rigid-body or springmass models with low fidelity. This paper proposes a modeling method for nonequatorial space elevators using a nodal-position finite element method (NPFEM) extended to a rotational coordinate system. The NPFEM is a three-dimensional finite element method that considers geometric nonlinearity. Conventional NPFEMs have only been formulated using inertial coordinate systems. This paper proposes a method to

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Dynamics of Space Elevator After Tether Rupture

Cited by 27 publications

References 13 publications

An Effective Approach Control Scheme for the Tethered Space Robot System

An Effective Approach Control Scheme for the Tethered Space Robot System

International opportunities and technical challenges for the space elevator

Dynamics and Energy Analysis of Nonequatorial Space Elevator Using Three-Dimensional Nonlinear Finite Element Method Extended to Noninertial Coordinate System

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