Application of H{sub}∞ control to automatic voltage regulator (AVR) of engine generator

摘要

The control of practical equipment has used the linear control theory of P, PI, PID. but, these theory become effective only to systems of linear characteristic, and if an artificial tuning is not done, the effect is not demonstrated for non linear characteristic systems. Then, the H{sub}∞ control theory which can design the controller who absorbs characteristic changes by defining it as model error has been thought for this problem. This theory has been complex. Nevertheless, a lot of examples of applying this theory to real machine are reported, because the research and development advances in recent years. But, the pursuit of the theory is valued as for any example therefore these examples have left the problem on practical use. Then, this thesis aims at the practical use of H{sub}∞, and applied the H{sub}∞ control to the engine generator which changed reactance in the excitation circuit by the load current valuing the practicality as one example. Moreover this generator output depends on the switching frequency not used as a control signal. Therefore, this thesis designed the 11, controller at each frequency (1-50kHz), because it's thought that a controller different in each frequency is designed.