H-infinity Control is a robust control strategy used in engineering to design systems that can maintain performance despite uncertainties and disturbances. It focuses on minimizing the worst-case scenario of system output, ensuring stability and reliability even when faced with unexpected changes in the environment or system parameters. This control method employs mathematical techniques to create a controller that optimally balances performance and robustness. By using linear matrix inequalities and frequency domain analysis, H-infinity Control helps engineers design systems that can effectively handle variations, making it suitable for applications in aerospace, automotive, and robotics.