ABSTRACT
Chapter 5 describes the major disturbance torques introduced in the space environment. Most of these torques are difficult to be included in the spacecraft models which are used to design the spacecraft controllers. This means that the designed controllers do not consider the effects of these disturbance torques. As a result, the designed controllers may not work in the real space environment because the control torques may not compensate these un-modeled torques. Because of this reason, there is a need to have some simulation test for the designed spacecraft control system which includes the space environment and calculates disturbance torques to validate the controller design. Chapter 5 provides the necessary information so that control engineers can build the simulation model to test the designed controller. Section 5.1 is focused on gradient torque. Unlike other disturbance torques, this section shows that the gradient torque can be included in control system model. Section 5.2 discusses atmosphere induced drag torques. Section 5.3 presents magnetic field induced torques. Section 5.4 describes the solar radiation torques. Section 5.4 talks about internal torques.
