H∞ loop-shaping design of flexible systems

The control design of the flexible system and the specific flexible characteristics are related, from a control angle of the flexible system is divided into a shaft drive mechanism, the truss structure and the sheet-type structure into three categories. Obvious characteristics of flexible sheet-type structure flexible system design examples show that the H. loop shaping method can effectively solve the difficulties the sheet type structure flexible system design to ensure the stability of the system, that is a sharp decline in the amplitude-frequency characteristics band within. General H_∞ control theory, H_∞ norm is performance indicators. But the actual design of the H_∞ loop shaping method H_∞ norm is represented stability margin, only the design specifications, and its performance is determined by the weighting function of forming the loop shaping design H_∞ controller used to meet the robust stability guarantee stability margin. The article also pointed out that the H_∞ loop shaping method is not given perturbation range of design issues, so the concept of robust design is also different from the conventional H_∞ control design.