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This paper proposes a controller synthesis approach adopting behavior classification to improve the lead vehicle's ability to deal with outer disturbances.
Difficulties for achieving precise and stable pointing arise from noisy onboard sensors, parameters indeterminacy, outer disturbances as well as un-modeled or hidden dynamics interactions.
Finally, simulation results show that, with the application of the proposed method, not only high-precision attitude stabilization of flexible spacecraft is achieved, but also the elastic vibration of flexible spacecraft during maneuver is suppressed effectively, and the system is robust against system uncertainties, network-induced delays and any outer disturbances.
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A new prefilter, which consists of an IIR filter and a Kalman filter using hidden Markov model, is designed to attenuate the influence of sensor noise and outer disturbance.
In IFFS-II, two proof-masses freely fly in the nearly pure gravitational orbit since the satellite shields them from the outer environmental disturbances.
On outer shelf subregions disturbance has been more intermittent (Fig. 1).
Moreover, the outer loop includes a disturbance compensation term based on a disturbance observer, which achieves the required insensitivity to payload changes.
The system design not only can realize stabilization and tracking control of three types of inverted pendulum, but also have robustness to outer large and fast disturbances.
Furthermore, based on the controller of outer loop, the composite disturbance of the inner loop was effectively estimated using the combination between the fast smooth second order sliding mode controller and the RHNN disturbance observer.
Subsequently, double power reaching law based sliding mode controller is designed to control receiver translational motion relative to tanker aircraft in the outer loop while active disturbance rejection control technique is applied to the inner loop to stabilize the receiver.
All through his thought for at least two decades had run the thread of a desire to ward off the disturbances of the outer world from the planned stability of the national economy.
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