Sometimes pure feed-forward control without feedback is called 'ballistic', because once a control signal has been sent, it cannot be further adjusted; any corrective adjustment must be by way of a new control signal.
有时没有反馈的纯前馈控制称为“弹道”，因为一旦发出控制信号，就无法进一步调整；任何纠正调整必须通过新的控制信号。