Verification of reaction wheel functional model in HIL test-bed

Abstract

Reaction Wheel (RW) is the most popular actuator in the Attitude Control System (ACS) of satellites which has a significant role in performing satellite missions. Reaction wheel supplies the torque and the momentum that is required for satellite attitude control. The RW model which is used in the ACS simulations and FDI algorithms should be an accurate model. On the other hand, each physical module has a special role in the reaction wheel modeling. In this regard, based on elements in the internal structure of this actuator, a precise model of RW is presented. Furthermore, the proposed model of RW is more general and can be used in other types of RW. Moreover, in this paper proposed a new model of the reaction wheel for ACS simulation. The proposed model of RW is validated by a RealTime HIL test bed in the form of set point commands and profile command.Keywords-satellite attitude control, modeling reaction wheel, hardware in the loop, brushless electric motor, disturbance torques of bearing, static and dynamic imbalance

A compressed-sensing-based compressor for ECG

“…As the ADC is more willing to consume more power, the focus of researchers have been centered on this module to reduce the power consumption with keeping the accuracy and resolution high [3]. Since the ECG signal is a good compressible signal and has redundant information, numerous ECG compression algorithms have been proposed [4][5][6][7][8][9][10]. There are a few factors that can help us to compare the compressors and their applied algorithms.…”