Index

A

Ackermann's formula 170, 212
adjugate of a matrix 74, 469
analog computer 207
analog computer implementation 163
augmented state-space equations 230
augmented system 186

B

block and beam 375
block matrix 470
Bode canonical form 256
Bode phase gain relationship 300
Bode plot 254, 256, 294

C

change of variables 162, 167
closed-loop Bode plot 297
closed-loop characteristic equation 162
closed-loop characteristic polynomial 88
closed-loop performance 273
closed-loop poles 88, 162
closed-loop transfer function 88
co-factor 469
companion form 165
complex conjugate poles 455
complex numbers 251
complex numbers - polar coordinates 251
complex numbers - rectangular coordinates 251
computed torque 56
conjugate of a complex number 252
control canonic form 163, 164, 474
control canonical form 324
control implementation 324
controllability matrix 169, 186
controllable 186
controllable system 169
critically damped 100
crossover frequency 293

D

damping forces 33
damping ratio 95, 98, 297
DC gain 96, 106, 170, 187
derivative control 82
derivative gain 83
design model 3
design models 46
design process 1
desired characteristic polynomial 88
determinant of a matrix 469
diagonal matrix 473
digital differentiator 158
digital implementation 217
dirty derivative 145
discrete differentiator 145
discrete integrator 145
distinct eigenvalues 472
disturbance observer 229
disturbance rejection 275, 278, 280, 293, 317

E

eigen-decomposition 472
eigenvalue of a matrix 471
eigenvalues 74, 161
eigenvector 471
equilibrium point 48
estimated state 205
Euler's relationship 252
Euler-Lagrange equation 10
Euler-Lagrange equations 31, 33

F

feedback linearization 47, 50, 56
final value theorem 125
first-order response 95
forced response 450
free integrator 130
frequency response 250, 254, 273, 297
full state feedback 161, 167
fundamental theorem of calculus 126

G

gain margin 296
generalized coordinates 10, 32
generalized forces 10, 32
generalized velocity 10

H

homogeneous response 450

I

innovation 206
input disturbance 131, 229, 273
input disturbance rejection 275, 280
input saturation 146, 298
integral control 82, 158, 159, 185, 314
integral feedback 212
integral gain 82
integrating factor 449
integrator 125, 144, 460
integrator anti-windup 145
interaction matrix 186
inverse Laplace transform 96, 97, 451
inverse of a matrix 470

J

Jacobian linearization 47, 49, 71

K

kinetic energy 8, 11

L

Lagrangian 33
Laplace transform 57, 73, 230, 450
linear independence 473
linearized system 171, 187
linearized systems 214
loop gain 294, 313
loop shaping control 3
loop-shaping 313
loopshape 293
loopshaping 250
low-pass filter 314, 315

M

magnitude of a complex number 251
magnitude of a transfer function 253
matrix 467
matrix addition 467
matrix adjugate 469
matrix determinant 469
matrix eigenvalue 471
matrix inverse 470
matrix minor 469
matrix multiplication 467
matrix rank 473
matrix trace 469
matrix transpose 468
measured output 171, 205
moments of inertia 16

N

natural frequency 95, 98, 297
noise 273
noise attenuation 275, 277, 293, 315
non-singular matrix 470
nonminimum phase zeros 104

O

observability matrix 211
observable 231
observable system 212
observation error 206
observer 205, 229
observer canonic form 208
observer error 206
observer gain 206, 209, 212
observer-based control 3
observers 158
open-loop characteristic polynomial 87
open-loop poles 87, 161
ordinary differential equations 449
output disturbance 131, 273
output disturbance rejection 275, 278
output equation 69
overdamped 100

P

parallel axis theorem 30
partial fraction expansion 102, 451
PD control 87
phase margin 294, 318
phase of a complex number 251
phase of a transfer function 253
phase-lag filter 314, 315
phase-lead filter 314, 317
PI control 82, 314
PID control 3, 82, 83, 143, 460
point mass 11, 31
pole locations 95
pole placement 185
poles 59, 74
potential energy 8, 31
potential energy of a spring 31
prefilter 325
proportional control 82
proportional gain 82, 314

R

rank of a matrix 473
rational transfer function 102
realization of a transfer function 162
reference command 82
reference input 131
reference output 171, 185, 205
residue 453
rise time 96, 99, 101
root locus 185, 457

S

s-function 427
sample period 145
sampled data system 143
second-order response 99
second-order systems 82
sensor noise 131
separation principle 212, 214
simulation Model 1
stability margins 313
state evolution equation 69
state feedback 158
state interaction matrix 161, 166
state-space equations 72, 161
state-space model 69, 205
state-space models 3, 158
steady-state error 83, 125
step response 95, 96, 101, 297, 449, 451
successive loop closure 105, 148, 327
system type 129, 132, 281, 315

T

Taylor series 47
trace of a matrix 469
tracking performance 275, 293, 317
transfer function 58, 60, 250, 253
transfer function model 162
transfer function models 3, 73
transpose of a matrix 468
Tustin approximation 145
type 0 system 282
type 1 system 283
type 2 system 284

U

underdamped 100
upper companion form 474
upper triangular matrix 474

V

Vandermonde matrix 474

Z

z-transform 144
zeros 59, 74, 101