Abstract
Hysteresis dampers are commonly used in Passive magnetic Attitude Control System (PACS). In PACS these rods produce a damping torque and reduce the satellite angular momentum and angular velocity. In this paper, a spin satellite was investigated which utilizes a passive magnetic damper consisting of magnetic hysteresis rods aligned with principal axis or spin axis of satellite and de-tumbling of the satellite, and the pure spin was achieved. An analytical model was presented to analyze hysteresis damper and a numerical simulation was performed to obtain dynamic properties of the spin attitude. In addition, assuming a dynamic imbalance, attitude behavior and damper effect on the spin rate of satellite were analyzed. The behavior of this passive magnetic stabilized satellite was simulated from the initial post separation phase.
Highlights
Spin stabilization is a current method to stabilize the attitude of a satellite in space
The purpose of the present paper is to investigate the results of using hysteresis dampers as nutation dampers in spin satellite to dissipate kinetic energy
Hysteresis dampers are currently used in passive magnetic attitude control system (PACS) [7,8,9]
Summary
Spin stabilization is a current method to stabilize the attitude of a satellite in space. The satellite gains a gyroscopic stiffness which makes its accurate control possible. Unwanted oscillations of the satellite must be damped out. Satellites are usually equipped with one or more nutation damping equipments. Nutation or damping unwanted angular rate can be achieved by active or passive attitude control. The active way is performed by countering the attitude determination using the respective sensors. This feedback system increases the power consumption, complexity, and risk of an active attitude determination and control system. In the passive way, no external energy and additional sensors and actuators are required. A dynamic analysis of the satellite attitude with damper is required to obtain mass properties and arrangement of the damper inside the satellite without any damage
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