Physics

Trajectory

Aerospace engineering

Field of view

Mathematics

Backstepping

Adaptive control

Astronomy

Limit (mathematics)

Engineering

Mathematical analysis

Political science

Artificial intelligence

Control (management)

Terminal guidance

Proportional navigation

Line-of-sight

Missile

Computer science

Kinematics

Control theory (sociology)

Missile guidance

Classical mechanics

IEEE Transactions on Aerospace and Electronic Systems

This paper proposes a guidance law that achieves the desired terminal impact time without violating a seeker's field-of-view (FOV) limits. In order to derive the guidance law, kinematic conditions for impact time control are defined, and the backstepping control technique is applied for the satisfaction of the conditions. As a virtual control input for the backstepping structure, the missile lead angle, which represents the angle between the line-of-sight (LOS) and missile velocity vector, is used and its magnitude is limited by a prescribed limit. Then, the seeker's look angle can also be confined within a specific range because the seeker look angle is mainly determined by the difference between the LOS and the velocity vector. This capability to confine the seeker's look angle with achieving the desired impact time is the main contribution of the paper. To evaluate the performance of the proposed law, numerical simulation is conducted. The result demonstrates that the proposed guidance law enables the missile to simultaneously achieve the interception and desired impact time without violating the prespecified FOV limits.

Backstepping-Based Impact Time Control Guidance Law for Missiles With Reduced Seeker Field-of-View