把磁带传送机构的运动分为三个阶段,即:启动、匀速运动和仃止(图9),磁带传送机构启动时换算环节(通常为主动电机轴)的角速度从零(ω=0)增加到规定带速时的角速度(ω_2=ω_y)。为了使磁带传送机构的运动件从静止状态转成规定带速时的状态,主动轴电机(即换算环节)在这一过渡时间t内所消耗的功等于作用于轴上的所有力的合力所作的功: The movement of the tape transport mechanism is divided into three stages, namely: start, constant speed and stop (Figure 9). The angular velocity of the conversion section (usually the active motor shaft) at the start of the tape transfer mechanism is increased from zero (ω = 0) To the provisions of speed with angular velocity (ω_2 = ω_y). In order for the moving part of the tape transport mechanism to change from a stationary state to a state at a given belt speed, the work consumed by the drive shaft motor (ie, the conversion section) during this transitional time t is equal to the resultant force of all the forces acting on the shaft Power: