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High-speed rotation of the central rotor in the reaction wheel causes imbalance torque to reduce the attitude control accuracy. Firstly, the attitude control accuracy requirement of high resolution imaging satellite with high resolution integration (TDI) CCD camera is given. Then, considering as much as possible disturbances inside the reaction-wheels, the dynamic equation of satellite attitude control...
Although direct conversion transmitters and receivers share the same structure certain differences in their behavior can be found. These differences result in diverse performance limitations. This paper derives a linear model of direct conversion transmitters and receivers. Based on this model methods to extract the frequency dependent characteristics are introduced and compensators are suggested...
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