This text will analyze technology requirement and realization way of flow field adjusting system of fl - 8 , and expatiate the theory of frequency conversion . ac variable frequency speed regulator controlled by dtc become the key technology of this facility and make it more advantage and credible . new method and tactic to control wind speed was given 本文分析了fl - 8风洞流场调节系统的技术需求和实现途径;阐述了变频原理, dtc控制的交流变频调速器作为风洞流场调节系统的先进性和高可靠性及关键技术;提出了风洞风速控制的方法和策略。