换向时间 meaning in English

tur acktime
turnaround time
turnback time

To determine reversal time
确定换向时间
Thirdly , it simulated the pumping circuit & dividing circuit with the widely used software matlab / simulink . the displacement of the rod piston and the impact of hydraulic are analyzed in the different input flow ( frequency of pump ) and different reversing time . it found out the cause of hydraulic impact ( one - to - one incorrespondence between the response time of dividing circuit and the operation time of rod piston ) , and gave some methods to weaken hydraulic impact . in the final part of the paper , the reliability of the theory analysis is further verified by the experiment of hydraulic system
首先在流变学原理的基础上，深入分析混凝土在输送管道内的流动状态，得出混凝土泵的负载特性方程；然后根据功率键合图的建模方法，建立泵送回路和分配回路的数学模型，并运用仿真软件matlab simulink对泵送和分配回路模型进行了仿真，分析了在不同的输入流量(泵送频率)和换向时间下，活塞杆的位移和系统的液压冲击情况，找到了引起液压冲击的根本原因(即分配回路的响应时间(固定值)与活塞杆的运动时间(变化值)不相匹配) ，并提出了相应的改进方法。