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Robust control design against uncertainties is an important matter particularly for safety-critical systems such as the aircraft. Uncertainties, which resulted from uncertain parameters of the system or unmodelled dynamics, affect the stability and performance of the system. This paper presents a fault-tolerant control scheme for a multi-variable aircraft dynamics using robust controllers. Robust...
This paper investigates how to use robust model prediction control in air-conditioning systems. Air-conditioning processes are described using a first-order plus time-delay model associated with uncertainties in process gain, time constant and time-delay. An uncertainty polytope is developed to describe the corresponding uncertainties when the continuous model is sampled into a discrete one and further...
The design of a robust two-degree-of-freedom (2-DOF) controller for a flight motion simulator is presented. Considering the load variation, torque disturbance, high-frequency mechanical resonance, input saturation and tracking precision, the controller is designed including a feedback controller and a feedforward controller to satisfy robust stability and robust performance simultaneously. The computation...
This paper investigates the application of different H∞ design methods to multivariable flight control system design for a VSTOL aircraft. Designs are based on linearised models at an airspeed of 120 knots. Although based on linearised operating points a key issue considered is robust stability and robust performance of designs away from the design operating points. Four different design approaches...
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