scholarly journals Cooperative Guidance Law against Highly Maneuvering Target with Dynamic Surrounding Attack

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Zhikai Wang ◽  
Wenxing Fu ◽  
Yangwang Fang ◽  
Zihao Wu ◽  
Mingang Wang
Keyword(s):  
Inverse Method ◽  
Extended State ◽  
Stable Method ◽  
Maneuvering Target ◽  
Guidance Law ◽  
State Observers ◽  
Cooperative Guidance ◽  
Dynamic Inverse ◽  
The Impact ◽  
Guidance Model

In this paper, a new dynamic surrounding attack cooperative guidance law against highly maneuvering target based on decoupled model is proposed. First, a new dynamic surrounding guidance strategy is proposed, and virtual targets are introduced to establish the cooperative guidance model for dynamic surrounding attack. Second, a dynamic inverse method is used to decouple the cooperative guidance model, and extended state observers (ESOs) are introduced to estimate the disturbances caused by target maneuver. Then, the impact time and dynamic surrounding guidance (ITDSG) law against highly maneuvering target is designed based on a prescribed-time stable method and the decoupled model. Finally, numerical simulations are performed to illustrate the superiority and effectiveness of the proposed ITDSG.

Cooperative guidance laws against highly maneuvering target with impact time and angle

2021 ◽  
pp. 095441002110260
Author(s):  
Zhikai Wang ◽  
Yangwang Fang ◽  
Wenxing Fu ◽  
Zihao Wu ◽  
Mingang Wang
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Terminal Sliding Mode ◽  
Maneuvering Target ◽  
Mode Control ◽  
Guidance Law ◽  
Cooperative Guidance ◽  
Multi Agent ◽  
Fast Power ◽  
Guidance Model

To address the issue that multiple missiles intercepting a highly maneuvering target simultaneously with desired angles, a novel cooperative guidance law based on the decoupled model in the line-of-sight (LOS) and normal LOS direction is proposed in LOS frame. However, there is control coupling in the two directions of the cooperative guidance model. In this article, we first decouple the guidance model and then separately design estimation decouple cooperative guidance law in two directions based on the decoupled model. The guidance law component in the LOS direction is designed with the integral sliding mode control and multi-agent consensus theory, where the combining disturbance is compensated by an adaptively estimated term. The guidance law component in the normal LOS direction is designed based on nonsingular terminal sliding mode control with fast power reaching law, and a nonlinear disturbance observer is introduced to estimate the combining disturbance. Then, the finite time convergence of time-to-go and LOS angle is proved. Finally, numerical simulation results demonstrate the effectiveness and superiority of the proposed cooperative guidance law.

scholarly journals Cooperative Guidance Law with Predefined-Time Convergence for Multimissile Systems

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Liang Jing ◽  
Changzhu Wei ◽  
Liang Zhang ◽  
Naigang Cui
Keyword(s):  
Angular Rate ◽  
Fixed Time ◽  
Line Of Sight ◽  
Consensus Protocol ◽  
Impact Time ◽  
Maneuvering Target ◽  
Guidance Law ◽  
Cooperative Guidance ◽  
The Impact ◽  
Guidance Laws

To intercept the maneuvering target through multimissile cooperation, predefined-time cooperative guidance (PTCG) law is presented with constraints including the impact time and the line-of-sight (LOS) angle. In order to achieve simultaneous interception, we propose a PTCG law in the LOS direction based on a predefined-time consensus protocol, which guarantees the achievement of consensus on each missile’s impact time within the predefined time. Furthermore, to ensure the predefined-time convergence of the LOS angle and the predefined-time convergence of the LOS angular rate, a PTCG law with a fixed-time disturbance observer (FxTDO) is presented in the normal direction of the LOS. Compared with the traditional finite-time or fixed-time cooperative guidance laws, the proposed PTCG law predefines the upper bound of the settling time as an explicit parameter. Finally, the simulation results of the PTCG law verify the efficiency of the proposed method.

scholarly journals Fixed-Time Cooperative Guidance Law With Angle Constraint for Multiple Missiles Against Maneuvering Target

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 73268-73277
Author(s):  
Liang Jing ◽  
Liang Zhang ◽  
Jifeng Guo ◽  
Naigang Cui
Keyword(s):  
Fixed Time ◽  
Maneuvering Target ◽  
Guidance Law ◽  
Multiple Missiles ◽  
Cooperative Guidance

Anti-disturbance trajectory tracking of quadrotor vehicles via generalized extended state observer

2019 ◽  
Vol 26 (13-14) ◽  
pp. 1173-1186 ◽  
Author(s):  
Di Shi ◽  
Zhong Wu ◽  
Wusheng Chou
Keyword(s):  
Trajectory Tracking ◽  
Ground Effect ◽  
State Observer ◽  
Extended State Observer ◽  
Wind Gust ◽  
Extended State ◽  
Multiple Disturbances ◽  
State Observers ◽  
Low Altitude ◽  
The Impact

During the trajectory tracking process and low altitude flight of quadrotor, wind gust and ground effect will significantly affect the accuracy and stability of the controller. Therefore, it is vital for a quadrotor to have a robust controller against multiple disturbances. To mitigate this challenge, an active anti-disturbance control strategy based on generalized extended state observer is proposed in this article. Firstly, quadrotor dynamics is modeled as cascaded translational and rotational loops, and the characteristics of wind gust and ground effect are analyzed. Secondly, two generalized extended state observers are constructed for those loops respectively to estimate and attenuate the impact of wind gust and ground effect, and the position and attitude controller are designed based on backstepping method. Finally, real time experiments are carried out on hovering and circle trajectory tracking conditions. The results illustrate that the proposed controller has more advantages in high precision trajectory tracking and low altitude flight of quadrotor in existence of multiple disturbances.

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