To address the challenge of optimizing placement actuators on an asymmetric spacecraft continuum system, this paper develops a rigid–flexible electromechanical coupling dynamic model that integrates interactions among rigidity, flexibility, and effects. The is constructed using ordinary differential equations partial (ODE–PDEs) considers effects installation position physical characteristics (m...

Formation control for multiple vehicles has become an active research area in recent years. Generally there are three approaches to this problem, namely leaderfollowing, behavioral, and virtual structure approaches. In this paper, formation control ideas for multiple spacecraft using virtual structure approach are presented. If there is no formation feedback from spacecraft to the virtual struc...

The AEA Technology (AEA) Small Cell concept allows an infinite range of battery sizes to be built up using the minimum amount of re-qualification. Furthermore, an extensive rolling stock of cells is held at AEA to ensure that future demand can be met without the need for programme delays due to cell manufacture lead-time. Batteries can be composed of modular blocks so that energy storage system...

This paper considers the problem of rotating a constellation of spacecraft using on/oo thrusters such that the relative distance between the spacecraft is maintained to within a speciied tolerance. The basic idea is to resolve all of the constraints into a sphere around the desired tra-jectory of each spacecraft. As the constellation rotates, the sphere sweeps out a tube that constrains the mot...

In this paper the earth’s magnetic field is simulated precisely while the intensity and direction of the field are verified with one of the standard references for selected points on the earth and the results are compared with some low-order models. In another simulation, the complete model is compared with a common approximate model. The magnetic field in orbital frame is described and to empl...

the problem of relative motion control for spacecraft formation flying in eccentric orbits is considered in this paper. due to the presence of nonlinear dynamics and external disturbances, a robust fuzzy sliding mode controller is developed. the slopes of sliding surfaces of the conventional sliding mode controller are tuned according to error states using a fuzzy logic and reach the pre-define...

The low-frequency disturbances transmitted by flexible cables are difficult to be attenuated for a novel disturbance-free payload spacecraft, which decreases the payload’s pointing accuracy and stability. In this research, new spacecraft configuration with high-precision inertial reference unit composed of capacitive sensors spherical test mass is proposed. disturbance attenuation control syste...

Air-bearing-based spacecraft simulators are widely used to develop and verify spacecraft control techniques required by modern spacecraft applications. To create a spacelike environment with ground spacecraft simulators, the effects of gravity should be minimized. For a spherical air-bearing system with 3 rotational degrees of freedom, the center of rotation of the spacecraft simulator should b...

1. ABSTRACT As a result of the interaction between the spacecraft and its operational environment, the constituent materials begin to change. These changes are determined by a combination of energy deposition, the resulting chemical reactions, and contamination. These changes negatively impact the ability of spacecraft operators to predict the behavior of a spacecraft as it ages. For example, i...