Integrated guidance and control strategy for homing of unmanned underwater vehicles

The main problem in bringing autonomy to any vehicle lies in the design of a suitable guidance law. For truly autonomous operation, the vehicle needs to have a reliable Navigation, Guidance and Control (NGC) system of which the guidance system is the key element that generates suitable trajectories to be followed. In this review paper, various guidance laws found in the literature and their relevance to autonomous underwater vehicles (AUVs) are discussed. Since existing guidance laws for underwater vehicles have emulated from tactical airborne missile systems, a number of approaches for the missile guidance systems are considered. Finally, potential guidance strategies for AUVs are proposed.

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Integrated Guidance and Control of Multiple Interceptor Missiles Based on Improved Distributed Cooperative Control Strategy

Journal of Aerospace Technology and Management ◽

10.5028/jatm.v11.1003 ◽

2019 ◽

Cited By ~ 1

Author(s):

Xiang Liu ◽

Xiaogeng Liang

Keyword(s):

Control Strategy ◽

Cooperative Control ◽

Control Algorithm ◽

Sliding Mode ◽

Design Method ◽

Dynamic Surface ◽

Guidance And Control ◽

Integrated Guidance And Control ◽

And Control ◽

Distributed Cooperative Control

In this study, an improved cooperative integrated guidance and control (IGC) design method is proposed based on distributed networks to address the guidance and control problem of multiple interceptor missiles. An IGC model for a leading interceptor is constructed based on the relative kinematic relations between missiles and a target and the kinematic equations of the missiles in a pitch channel. The unknown disturbances of the model are estimated using a finite-time disturbance observer (FTDO). Then, the control algorithm for the leading interceptor is designed according to the disturbance estimation and nonsingular fast dynamic surface sliding mode control (SMC). To enhance the rate of convergence of the cooperative control commands for the interceptors, an improved cooperative control strategy is proposed based on the leader-follower distributed network. Consequently, the two velocity components of the interceptor in the pitch channel can be obtained, which are subsequently converted to the total velocity and flight path angle commands of the interceptor using kinematic relations. The control algorithm for the following interceptor is similarly designed using an FTDO and dynamic surface SMC. The effectiveness of the improved distributed cooperative control strategy for multiple interceptors is validated through simulations.

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Integral barrier Lyapunov functions-based integrated guidance and control design for strap-down missile with field-of-view constraint

Transactions of the Institute of Measurement and Control ◽

10.1177/0142331220981329 ◽

2021 ◽

pp. 014233122098132

Author(s):

Bin Zhao ◽

Zhenxin Feng ◽

Jianguo Guo

Keyword(s):

Sliding Mode ◽

State Equation ◽

Field Of View ◽

Feedback Form ◽

Theoretical Derivation ◽

Guidance And Control ◽

Integrated Guidance And Control ◽

Twisting Algorithm ◽

And Control ◽

Special Time

The problem of the integrated guidance and control (IGC) design for strap-down missile with the field-of-view (FOV) constraint is solved by using the integral barrier Lyapunov function (iBLF) and the sliding mode control theory. Firstly, the nonlinear and uncertainty state equation with non-strict feedback form for IGC design is derived by using the strap-down decoupling strategy. Secondly, a novel adaptive finite time disturbance observer is proposed to estimate the uncertainties based on an improved adaptive gain super twisting algorithm. Thirdly, the special time-varying sliding variable is designed and the iBLF is employed to handle the problem of FOV constraint. Theoretical derivation and simulation show that the IGC system is globally uniformly ultimately bounded and the FOV angle constraint is also guaranteed not only during the reaching phase but also during the sliding mode phase.

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