ROBUST CONTROL OF FLEXIBLE SPACECRAFT CONSIDERING ACTUATOR DYNAMIC

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MALEKZADEH MARYAM

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:15 Page(s): 225-230

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Title

ROBUST CONTROL OF FLEXIBLE SPACECRAFT CONSIDERING ACTUATOR DYNAMIC

Author(s)

MALEKZADEH MARYAM | Issue Writer Certificate

Keywords

NONLINEAR FLEXIBLE SPACECRAFTQ2

ACTUATOR DYNAMICSQ2

DYNAMIC INVERSIONQ2

μ -SYNTHESISQ2

Abstract

In this paper, the effect of the reaction wheel dynamics as controller actuator in multi axis attitude maneuver of a 3D NONLINEAR FLEXIBLE SPACECRAFT is considered. In modeling of the actuator dynamic, friction, inertia and electrical subsystems are considered. The nonlinear robust control approach is composed of DYNAMIC INVERSION and m-synthesis schemes. To overcome the non-minimum phase characteristics, the controllers are designed by utilizing the modified output re-definition approach. In the design of controllers, actuator saturation is considered. It is assumed that only three reaction wheels in three directions on the hub are used. To evaluate the performance of the proposed controllers, an extensive number of simulations on a nonlinear model of the spacecraft are performed. The performances of the proposed controllers is compared in terms of nominal performance, robustness to uncertainties, vibration suppression of panel, sensitivity to measurement noise, environment disturbance and nonlinearity in large maneuvers. In the disturbance modeling all terms such as constant, sinusoidal and impulse are considered. Simulation results show the effects of ACTUATOR DYNAMICS and confirm the ability of the proposed controller in tracking the attitude trajectory while damping the panel vibration.

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APA: Copy

MALEKZADEH, MARYAM. (2015). ROBUST CONTROL OF FLEXIBLE SPACECRAFT CONSIDERING ACTUATOR DYNAMIC. MODARES MECHANICAL ENGINEERING, 14(15), 225-230. SID. https://sid.ir/paper/177712/en

Vancouver: Copy

MALEKZADEH MARYAM. ROBUST CONTROL OF FLEXIBLE SPACECRAFT CONSIDERING ACTUATOR DYNAMIC. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(15):225-230. Available from: https://sid.ir/paper/177712/en

IEEE: Copy

MARYAM MALEKZADEH, “ROBUST CONTROL OF FLEXIBLE SPACECRAFT CONSIDERING ACTUATOR DYNAMIC,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 15, pp. 225–230, 2015, [Online]. Available: https://sid.ir/paper/177712/en

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