Nonlinear observer for nonlinear adaptive guidance law considering target uncertainties and control loop dynamics

2003 ◽  
Author(s):  
DongKyoung Chwa ◽  
A.G. Sreenatha ◽  
Ki Hong Im ◽  
Jin Young Choi ◽  
Jin H. Seo
Keyword(s):  
Nonlinear Observer ◽  
Control Loop ◽  
Guidance Law ◽  
Loop Dynamics ◽  
Adaptive Guidance ◽  
And Control

scholarly journals Rope-Hook Recovery Controller Designed for a Flying-Wing UAV

Aerospace ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 384
Author(s):  
Zhao Deng ◽  
Fuqiang Bing ◽  
Zhiming Guo ◽  
Liaoni Wu
Keyword(s):  
Attitude Control ◽  
Tracking Error ◽  
Recovery Process ◽  
Flight Test ◽  
Control Loop ◽  
Proportional Navigation ◽  
Outer Loop ◽  
Guidance Law ◽  
Disturbance Rejection Control ◽  
And Control

Due to the complexity of landing environments, precision guidance and high-precision control technology have become key to the rope-hook recovery of shipborne unmanned aerial vehicles (UAVs). The recovery process was divided into three stages and a reasonable guidance strategy had been designed for them, respectively. This study separated the guidance and control issues into an outer guidance loop and an inner control loop. The inner loop (attitude control loop) controled the UAV to follow the acceleration commands generated by the outer loop (trajectory tracking loop). The inner loop of the longitudinal controller and the lateral controller were designed based on active disturbance rejection control (ADRC), which has strong anti-interference ability. In the last phase, the outer loop of the longitudinal controller switched from a total energy control system (TECS), which greatly decoupled the altitude channel and speed channel, to the proportional navigation (PN) guidance law, while the outer loop of lateral controller switches from the proportional control law based on the L1 guidance law, which can reduce the tracking error and deviation, to the PN guidance law, which considerably enhances the tracking precision. Finally, the simulation data and flight test data show that the controller has strong robustness and good tracking precision, which ensures safe rope-hook recovery.

Research of Integrated Design about Guidance and Control of Homing UAV

2013 ◽  
Vol 373-375 ◽  
pp. 1428-1431 ◽  
Author(s):  
Jian Cao ◽  
Cong Yan ◽  
Li Liu
Keyword(s):  
Integrated Design ◽  
Control Model ◽  
Nonlinear Observer ◽  
Guidance And Control ◽  
Guidance Law ◽  
Aerial Vehicle ◽  
Integrated Guidance And Control ◽  
The One ◽  
And Control ◽  
Better Than

Integrated design about guidance and control of homing unmanned aerial vehicle (UAV) is proposed. Firstly, an integrated guidance and control model with uncertainties can be described. Secondly, a nonlinear observer is designed for the integrated guidance and control model. Finally, the simulation results show that the nonlinear adaptive guidance law using the proposed integrated design model can perform better than the one designed separately.

Integrated Design about Guidance and Control in Inversible System of Neural Network

2013 ◽  
Vol 415 ◽  
pp. 294-297
Author(s):  
Jian Cao ◽  
Cong Yan ◽  
Jian He Li
Keyword(s):  
Neural Network ◽  
Integrated Design ◽  
Training Sample ◽  
Control Model ◽  
Nonlinear Observer ◽  
Guidance And Control ◽  
Guidance Law ◽  
Integrated Guidance And Control ◽  
The One ◽  
And Control

Integrated design about guidance and control in inversible system of neural network is proposed. Firstly, an integrated guidance and control model with uncertainties can be described. Secondly, a nonlinear observer is designed for the integrated guidance and control model. Subsequently, selection of training sample is focused on. Finally, the simulation results show that the nonlinear adaptive guidance law using the proposed integrated design model can perform better than the one designed separately.

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