X(s) is now called the reference input. The purpose of the negative feedback loop is to make the system output equal to the system input, by identifying large differences between X(s) and Y(s) and correcting for them.
What unit of measurement is used for acceleration? In SI, acceleration is measured in meters / second2, or meters / second / second. In other units, units of the same dimension have to be used, i.e., [length] / [time] / [time] â¦ .For example, in the imperial units, feet per square second is quite common.1 person found this useful. GB.n SI, acceleration is measured in meters / second2, or meters / second / second. In other units, units of the same dimension have to be used, i.e., [length] / [time] / [time] â¦ . For example, in the imperial units, feet per square second is quite common. 1 person found this useful. GB.
By the way, this metric measure of energy has an English counterpart which you've probably seen used to describe air conditioners and furnaces. The amount of energy needed to change the temperature of one POUND of liquid water by one degree FAHRENHEIT is called a British Thermal Unit, or BTU.