(a) The control input is the elevator deflection angle u(t) = 8(t). Define the output as y(t) = 0 (t), the pitch angle. The following linear time-invariant ODE expresses the relationship between u(t) and y(t) under certain conditions (it is derived from linearized equations of motion of the aircraft): = 1.2 ÿ + 0.74 ÿ + 0.92 ý 0.18 u State the order of this ODE. Use the ODE and a Laplace transform table to derive the open-loop (or forward-path) transfer function, H(s) = Y(s)/U(s) = 0(s)/A(s). Submit your calculations. (b) Compute the finite zeros and finite poles of H(s) and state the number of infinite zeros of H(s). Is the transfer function H(s) stable, marginally stable, or unstable? Justify your answer.

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(a) The control input is the elevator deflection angle u(t) = 8(t). Define the output as y(t) = 0(t),
the pitch angle. The following linear time-invariant ODE expresses the relationship between u(t)
and y(t) under certain conditions (it is derived from linearized equations of motion of the aircraft):
ÿ +0.74 ÿ + 0.92 y
State the order of this ODE. Use the ODE and a Laplace transform table to derive the open-loop
(or forward-path) transfer function, H(s) = Y(s)/U(s) = (s)/A(s). Submit your calculations.
R(s):
C(s):
(b) Compute the finite zeros and finite poles of H(s) and state the number of infinite zeros of
H(s). Is the transfer function H(s) stable, marginally stable, or unstable? Justify your answer.
=
= 1.2 0.18 u
Parts (c) (e) pertain to the unity negative feedback controller shown below, in which
Odes (s) is the desired pitch angle, H(s) is the transfer function computed in part (a), and
K(s+1)
-, a proportional-integral (PI) controller with a single control gain K.
S
R(s) 0
C(s)
H(s)
- Y(s)
Transcribed Image Text:(a) The control input is the elevator deflection angle u(t) = 8(t). Define the output as y(t) = 0(t), the pitch angle. The following linear time-invariant ODE expresses the relationship between u(t) and y(t) under certain conditions (it is derived from linearized equations of motion of the aircraft): ÿ +0.74 ÿ + 0.92 y State the order of this ODE. Use the ODE and a Laplace transform table to derive the open-loop (or forward-path) transfer function, H(s) = Y(s)/U(s) = (s)/A(s). Submit your calculations. R(s): C(s): (b) Compute the finite zeros and finite poles of H(s) and state the number of infinite zeros of H(s). Is the transfer function H(s) stable, marginally stable, or unstable? Justify your answer. = = 1.2 0.18 u Parts (c) (e) pertain to the unity negative feedback controller shown below, in which Odes (s) is the desired pitch angle, H(s) is the transfer function computed in part (a), and K(s+1) -, a proportional-integral (PI) controller with a single control gain K. S R(s) 0 C(s) H(s) - Y(s)
(a) The control input is the elevator deflection angle u(t) = 8(t). Define the output as y(t) = 0(t),
the pitch angle. The following linear time-invariant ODE expresses the relationship between u(t)
and y(t) under certain conditions (it is derived from linearized equations of motion of the aircraft):
ÿ +0.74 ÿ + 0.92 y
State the order of this ODE. Use the ODE and a Laplace transform table to derive the open-loop
(or forward-path) transfer function, H(s) = Y(s)/U(s) = (s)/A(s). Submit your calculations.
R(s):
C(s):
(b) Compute the finite zeros and finite poles of H(s) and state the number of infinite zeros of
H(s). Is the transfer function H(s) stable, marginally stable, or unstable? Justify your answer.
=
= 1.2 0.18 u
Parts (c) (e) pertain to the unity negative feedback controller shown below, in which
Odes (s) is the desired pitch angle, H(s) is the transfer function computed in part (a), and
K(s+1)
-, a proportional-integral (PI) controller with a single control gain K.
S
R(s) 0
C(s)
H(s)
- Y(s)
Transcribed Image Text:(a) The control input is the elevator deflection angle u(t) = 8(t). Define the output as y(t) = 0(t), the pitch angle. The following linear time-invariant ODE expresses the relationship between u(t) and y(t) under certain conditions (it is derived from linearized equations of motion of the aircraft): ÿ +0.74 ÿ + 0.92 y State the order of this ODE. Use the ODE and a Laplace transform table to derive the open-loop (or forward-path) transfer function, H(s) = Y(s)/U(s) = (s)/A(s). Submit your calculations. R(s): C(s): (b) Compute the finite zeros and finite poles of H(s) and state the number of infinite zeros of H(s). Is the transfer function H(s) stable, marginally stable, or unstable? Justify your answer. = = 1.2 0.18 u Parts (c) (e) pertain to the unity negative feedback controller shown below, in which Odes (s) is the desired pitch angle, H(s) is the transfer function computed in part (a), and K(s+1) -, a proportional-integral (PI) controller with a single control gain K. S R(s) 0 C(s) H(s) - Y(s)
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