scholarly journals Discrete-Roughness Transition for Hypersonic Flight Vehicles

2008 ◽  
Vol 45 (2) ◽  
pp. 216-227 ◽  
Author(s):  
Scott A. Berry ◽  
Thomas J. Horvath
Keyword(s):  
Roughness Transition ◽  
Hypersonic Flight ◽  
Flight Vehicles

scholarly journals Disturbance observer-based control for nonlinear systems subject to mismatched disturbances with application to hypersonic flight vehicles

2017 ◽  
Vol 14 (2) ◽  
pp. 172988141769914 ◽  
Author(s):  
Yunling Li ◽  
Ming Zeng ◽  
Hao An ◽  
Changhong Wang
Keyword(s):  
Nonlinear Systems ◽  
Disturbance Observer ◽  
State Of The Art ◽  
Output Channel ◽  
Tracking Problem ◽  
Gain Matrix ◽  
Hypersonic Flight ◽  
Flight Vehicles ◽  
Nominal Performance ◽  
Mismatched Disturbances

For a class of multi-input multi-output nonlinear systems, a disturbance observer-based control is proposed to solve the tracking problem in the presence of mismatched disturbances. By designing a novel compensation gain matrix, the disturbances can be removed from the output channel completely as well as retaining the nominal performance. Compared with the state of the art, the gain matrix reduces to be constant; therefore, the complexity of the controller is simplified greatly. This method is applied to the control of hypersonic flight vehicles to demonstrate its effectiveness.

scholarly journals Prescribed Performance Tracking Control for Hypersonic Flight Vehicles with Model Uncertainties

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Siyuan Zhao ◽  
Xiaobing Li ◽  
Xiangwei Bu ◽  
Dongyang Zhang
Keyword(s):  
Tracking Control ◽  
Tracking Error ◽  
Longitudinal Motion ◽  
Model Uncertainties ◽  
Prescribed Performance ◽  
Hypersonic Flight ◽  
Flight Vehicles ◽  
Performance Tracking ◽  
Control Objective ◽  
Proportional Integral Controller

This paper proposes a novel prescribed performance tracking control for a hypersonic flight vehicle (HFV) with model uncertainties. Firstly, a HFV longitudinal motion model is decomposed into a velocity subsystem and an altitude subsystem. Meanwhile, considering the uncertainties of the model, the velocity subsystem and altitude subsystem are directly expressed as the forms with unknown nonaffine functions. Secondly, a novel performance function without initial error is proposed for limiting the tracking error into a prescribed range. Then, for the altitude subsystem, the control objective is changed by model transformation and the prescribed performance backstepping controller is designed. For the velocity subsystem, a prescribed performance proportional-integral controller is proposed which has better engineering practicability. The designed controller is not only simple in form but also has few calculating parameters. Finally, the simulation results show that the proposed controller has good practicability.

Sign in / Sign up

Export Citation Format

Share Document