抄録
This paper proposes a new real time virtual desired signal design method for improving the tracking characteristics to the actual desired signal. The augmented system comprising the already designed servo system is synthesized and the virtual desired signal is derived as a control input signal of the augmented system. Then the information of the servo system is used as a feedback signal in the virtual desired signal which is derived by considering the response of the designed servo system. It is also expanded to the preview virtual desired signal under the assumption that future signals of the desired signal and the disturbance signal are available. The proposed preview virtual desired signal has following characteristics.
A) preview virtual desired signal that cooperates the designed servo systems is derived using the information about that.
B) It can cope with the parameter errors and disturbances.
C) Both gain characteristics and phase characteristics are improved.
D) It can be added to the general servo system.
E) Its design is simple because the contol design parameter is only the weight of the virtual desired signal.
