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nature : a disturbance by adjusting the amount of open loop control system. Through its compensation device (feedforward regulator) compensation to be excellent momentum transfer parameters and can be transferred to stabilize the parameters of purpose. When a disturbance access to the system, though they are not yet have a transfer parameter deviations feedforward compensation for compensation as a result, a signal to manipulate control valve to offset the impact of disturbance. However, this system will only enter feedforward compensation compensation device interference, the lack of access to compensation device interference not play any role. Moreover, there was no transfer of the given parameters and measured values of the comparison, therefore, not regulated by feedback effects to be tested. When there is no access to feedforward compensation device larger amount of interference, the absence of any measures taken, it can be transferred parameter deviations can be very heavy. Therefore, in most cases, feedforward and feedback regulation combined, constitute feedforward-feedback control system.
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