Extended state observer based impact angle constrained guidance law for maneuvering target interception

In order to intercept high maneuvering target, a super twisting guidance law based on extended state observer (ESO) is proposed. The target acceleration can be defined as external disturbance which can be estimated in ESO and compensated in super twisting guidance law. The super twisting algorithm can effectively decrease the undesired charting which exists in normal sliding mode control. The simulation results which are verified via computer show that this guidance law has strong robustness, target acceleration can be estimated and compensated, and has good miss distance.

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Impact angle control based on integral sliding mode manifold and extended state observer

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/0954410018772401 ◽

2018 ◽

Vol 233 (6) ◽

pp. 2131-2140

Author(s):

Xiaojian Zhang ◽

Mingyong Liu ◽

Yang Li ◽

Feihu Zhang

Keyword(s):

Sliding Mode ◽

Impact Angle ◽

State Observer ◽

Extended State Observer ◽

Line Of Sight ◽

Extended State ◽

Integral Sliding Mode ◽

Guidance Law ◽

Switched Nonlinear System ◽

The Impact

This paper discusses the issue of impact angle control over guidance in scenarios of an interceptor against the maneuvering targets. Inspired by switched nonlinear system, an integral sliding mode manifold is first developed. Then, the impact angle control over guidance is derived by using the integral sliding mode manifold with finite time control. To obtain precise guidance effect, the second-order of extended state observer is proposed in the case of unknown target acceleration. Finally, composited impact angle control over guidance based on extended state observer is developed. The stability analysis of the proposed guidance law is demonstrated by using Lyapunov function, and theoretical proof that the line-of-sight angle and line-of-sight angular rate can converge to the desired value in finite steps, respectively. Numerical simulation results are illustrated to validate the performance of the proposed guidance law.

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Extended-State-Observer-Based Collision-Free Guidance Law for Target Tracking of Autonomous Surface Vehicles with Unknown Target Dynamics

Complexity ◽

10.1155/2018/4154670 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

Shengnan Gao ◽

Zhouhua Peng ◽

Dan Wang ◽

Lu Liu

Keyword(s):

Target Tracking ◽

State Observer ◽

Extended State Observer ◽

Guidance System ◽

Extended State ◽

Reduced Order ◽

Maneuvering Target ◽

Guidance Law ◽

Autonomous Surface Vehicle ◽

Velocity Information

This paper is concerned with the target tracking problem of an autonomous surface vehicle in the presence of a maneuvering target. The velocity information of target is totally unknown to the follower vehicle, and only the relative distance and angle between the target and follower are obtained. First, a reduced-order extended state observer is used to estimate the unknown relative dynamics due to the unavailable velocity of the target. Based on the reduced-order extended state observer, an antidisturbance guidance law for target tracking is designed. The input-to-state stability of the closed-loop target tracking guidance system is analyzed via cascade theory. Furthermore, the above result is extended to the case that collisions between the target and leader are avoided during tracking, and a collision-free target tracking guidance law is developed. The main feature of the proposed guidance law is twofold. First, the target tracking can be achieved without using the velocity information of the target. Second, collision avoidance can be achieved during target tracking. Simulation results show the effectiveness of the proposed antidisturbance guidance law for tracking a maneuvering target with the arbitrary bounded velocity.

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