Nomenclature

A		state matrix
B		input matrix
cg		centre of gravity
C		output matrix
C _D		drag coefficient
C _L		lift coefficient
D		direction cosine matrix; direct matrix
g		acceleration due to gravity
G		transfer function matrix
h		height
I _x		moment of inertia in roll
I _y		moment of inertia in pitch
I _z		moment of inertia in yaw
I		identity matrix
I _xz		product of inertia about ox or oz axes
k _q		pitch-rate transfer function gain constant
k _u		axial-velocity transfer function gain constant
k _w		normal-velocity transfer function gain constant
k _?		pitch-attitude transfer function gain constant
k _?		turbojet engine gain constant
L		rolling moment
m		mass
M		pitching moment
M		'mass' matrix
N		yawing moment
N		numerator matrix
o		origin of axes
p		roll-rate perturbation
q		pitch-rate perturbation
r		yaw-rate perturbation
s		Laplace operator
t		time; maximum aerofoil section thickness
T _r		roll-mode time constant
T _s		spiral-mode time constant
T _u		numerator zero in axial-velocity transfer function
T _?		numerator zero in normal-velocity transfer function
T _?		numerator zero in pitch-rate and attitude transfer functions
T _?		turbojet engine time constant
u		axial-velocity perurbation
u		input vector
U		total axial velocity
U _e		axial component of steady-equilibrium velocity
V

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Flight Control Systems: Practical Issues in Design and Implementation