Three-dimensional guidance law with precise control of attack time and constraints on attack angle

Area of Science:

• Aerospace Engineering
• Control Systems Theory
• Guidance, Navigation, and Control (GNC)

Background:

• Maneuvering targets pose significant challenges for missile guidance systems.
• Communication disruptions can hinder coordinated strike capabilities.
• Existing guidance laws may struggle with dynamic target changes and uncertainties.

Purpose of the Study:

• To develop a robust guidance law for precise strikes against maneuvering targets within specific time and angle constraints.
• To enable coordinated missile attacks even during communication disruptions.
• To reduce reliance on expensive seekers through predictive guidance.

Main Methods:

• Fractional Power Extended State Observer (FPESO) for accurate acceleration estimation.
• Nonlinear PID Sliding Mode Control (NPIDSMC) with an adjustable parameter for adaptability.
• FPESO-NPIDSMC guidance law integrating observer and controller.
• Simulation and Monte Carlo analysis for validation.

Main Results:

• FPESO accurately estimates target acceleration, mitigating system uncertainties.
• The FPESO-NPIDSMC guidance law achieves precise strikes within specified time and angle windows.
• Validated superiority in complex combat environments through simulations.
• Demonstrated capability for coordinated strikes without communication.

Conclusions:

• The FPESO-NPIDSMC guidance law offers a robust solution for intercepting maneuvering targets.
• It enhances cooperative attack capabilities by enabling communication-free coordinated strikes.
• Reduces interception costs by transforming the problem into predictive guidance.