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This paper investigates the attitude control of a modular picosatellite named NPU-PhoneSat based on shape actuation. The PhoneSat is composed of multiple blocks connected by active joints. Much like a falling cat can reorient itself in mid-air, this modular PhoneSat could reorient itself without changes in net angular momentum by altering the shape and instantaneous mass distribution during attitude...
We propose a pure topological recurrent network controller for satellite attitude control, which has random binary connections in hidden layer, and all hidden neurons are activated by sinusoidal functions. A direct graph encoding method and four genetic operators are implemented for using genetic programming to train this controller. Moreover, a simulated small satellite which equipped with three...
It is vital to calculate the relative position and pose in many important space missions, such as space formation, rendezvous and docking, space capturing and maintenance etc. It is a direction to get the relative position and pose based on computer vision currently all over the world. And this method is also valid for spacecrafts. In this paper, on the basis of the attitude dynamics of spacecrafts...
In space application, the space robot is being used to repair and construct spacecrafts. As well known, the high dynamic coupling between the arm and its base causes the interactive disturbance. The motion of arm disturbs the attitude of the base, the attitude changes affect the manipulating precision of the end-effector. Even, such a disturbance may produce the serious impact between the arm's end-effector...
Because of its payload's work characteristic, it requires much higher precision in Earth observation satellite's attitude control systems than others. Most Earth observation satellites use zero-momentum three-axis stabilization control method. This paper investigates this control method in satellite control system, deducing the dynamics and kinematics of satellite attitude's model expressed by attitude...
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