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Robust adaptive time-varying formation control problems for high-order linear multi-agent systems with parameter uncertainties and external disturbances are investigated. Firstly, using the adaptive updating mechanism, a fully distributed time-varying formation control protocol is proposed. The protocol is determined by each agent in a fully distributed form and does not need any global information...
Morphing wing has a significant impact on dynamic characteristics of very flexible aircraft (VFA), effective control of VFA is premised on accurate control of wing shape. A simplified control model for the morphing wing dynamics of VFA was established. A new controller architecture used for wing shape control was proposed based on NDI and NESO method. Lyapunov function was introduced to discuss the...
A robust fault-tolerant controller integrating fault detection and compensation for flight control surfaces failures is discussed, a method is proposed using the extended state observer compensating the faults. The complete system comprises of two controllers. The main controller is designed for high performance of the original faultless system. The compensating controller is based on a nonlinear...
This paper aims at developing a systematic approach in frequency domain to design robust fault detection filters for linear time invariant (LTI) systems with model uncertainties. Three types of fault detection (FD) problems, i.e., H-/Hinfin problem, H2/Hinfin problem and Hinfin/Hinfin problem, are formulated and a procedure for designing the optimal robust fault detection filters is presented.
A new scheme of incorporating the fault tolerance and disturbance rejection in an existing flight control system is proposed. Method to design a standalone compensator is suggested which is added to the original system in order to guarantee the system stability and performance in the presence of fault or disturbances. Thus the controller, which is designed separately considering all the design parameters...
This paper examines the design of unknown input observers from a frequency domain point view and shows that a UIO design can be formulated as a perfect H2 or Hinfin disturbance rejection problem that many tools in robust control field can be applied. In particular, it is shown that a more general non-perfect disturbance rejection or approximate UIO problem may be considered and potentially interesting...
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