在液压伺服控制中，有用到数学函数指数，这个内部的原理是什么？用指数有什么优点？

官方的解释
Step distance: Definition of the step distance
Ramp forwards, backwards: Acceleration
Exponent ramp: Exponent for ramp calculation？？？？指数
Deceleration forwards, backwards: Start point of the deceleration curve.？？？
Vmax forwards, backwards: Maximum speed.
Hysteresis forwards, backwards: Range in angle transmitter steps in which the axis remains position controlled.
Min. speed forwards, backwards: Minimum speed
Exponent forwards, backwards: Form of deceleration curve. 减速曲线

看起来是斜率的意思。