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Reconfigurable NDI controller using inertial sensor failuredetection & isolation

机译:使用惯性传感器故障检测和隔离的可重新配置NDI控制器

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A modified derivation of nonlinear dynamic inversion provides the theoretical underpinnings for a reconfigurable control law for aircraft that have suffered combinations of actuator failures, missing effector surfaces, and aerodynamic changes. The approach makes use of acceleration feedback to extract information pertaining to any aerodynamic change and thus does not require a complete aerodynamic model of the aircraft. The control law does require feedback of effector positions to accommodate actuator dynamics. Both accelerometer and rate gyro failure detection and isolation (FDI) systems are implemented, allowing up to three independent failures for each FDI system as long as they are in different axes. Nonlinear simulation results show that the FDI systems improve the robustness to accelerometer/rate gyro uncertainties. An advanced tailless aircraft model is used to demonstrate the concepts. The simulation includes accelerometer and rate gyro noise and bias, failures due to accelerometers, rate gyros, and actuators, and modeled missing surfaces that cause airplane aerodynamic changes
机译:非线性动态反演的修正推导为飞机的可重构控制定律提供了理论基础,该定律适用于遭受执行器故障,缺失效应器表面和空气动力学变化的组合的飞机。该方法利用加速度反馈来提取与任何空气动力学变化有关的信息,因此不需要飞机的完整空气动力学模型。控制定律确实需要反馈执行器位置以适应执行器动态。加速度计和速率陀螺仪故障检测与隔离(FDI)系统均已实现,只要每个FDI系统在不同的轴上,最多允许三个独立的故障。非线性仿真结果表明,FDI系统提高了对加速度计/速率陀螺仪不确定性的鲁棒性。先进的无尾飞机模型用于演示概念。仿真包括加速度计和速率陀螺仪的​​噪声和偏差,由于加速度计,速率陀螺仪和执行器引起的故障以及造成飞机空气动力学变化的模型缺失表面

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