Package com.flarerobotics.lib.math

Class PhysicsUtil

java.lang.Object

com.flarerobotics.lib.math.PhysicsUtil

public class PhysicsUtil
extends Object

A physics utility class.

Field Summary

Fields

Modifier and Type	Field	Description
static double	kG	The graviational acceleration of the earth in m/s^2.

Method Summary

Modifier and Type	Method	Description
static double	computeAirDensity(double temp, double alt, double rel)	Computes the air density.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

kG

public static double kG

The graviational acceleration of the earth in m/s^2.

Method Details

computeAirDensity

public static double computeAirDensity(double temp,
 double alt,
 double rel)

Computes the air density.

Note: Air density can be calculated via:

S = 611.21 * exp(17.502 * T / (240.97 + T)) Rho_air = (101325 * (1 - 0.0065 * Y / 288.15)^5.255877 - H * S) / (287.05 * (T + 273.15)) + H * S / (461.5 * (T + 273.15))

where T is the temperature in Celsius, Y is the altitude in meters, and H is the relative humidity in range [0, 1].

Parameters:

temp - The temperature, in Celsius.

alt - The altitude, in meters.

rel - The relative humidity, in the range [0, 100]%.

Returns:

The air density, in kg/m^3.