Flight control -state estimators , Other Engineering

Assignment Help:

State-estimators for continuous time linear systems

The state space state and output equations of continuous time linear systems is of the form?

x = Ax + Bu + v

and

y = Cx + Du + w

where u is the control input (signal to actuator), v is the disturbance on the state and w is the disturbanceon the output.

 When we can measure all the components of the state vector x then we can use state feedback to control the system. We cannot always measure states however (usually we can only measure a few and possibly only one output variable) due to practical infeasibility or cost of installing and maintaining transducers. To use state feedback control methods we can then estimate the states from the input and output of the system and a knowledge of the system dynamics (that is using the known values of A , B,C and D ). Reconstructing, observing or estimating the states can also useful for condition monitoring of the system.

 If the system we are to observe has the state and output equation above then to observe or estimate the state x we attach a system called an observer or state estimator (implemented in the flight control computer) as in with the negative feedback ue = -Gey so that it is governed by the equations?

633_State estimators.png

where x is the additional state of the attached observer which as will be seen represents an estimate of the original state x. As can be seen from ?gure the output error term term

2326_State estimators1.png

is a measure of the error in the estimate of the output y and is called the innovation term because it is the

2016_State estimators2.png

343_State estimators3.png


Related Discussions:- Flight control -state estimators

Governing equations of typical section aerofoil, We recall the "typical sec...

We recall the "typical section" aerofoil model with oscillating pitching and plunging motions to represent the torsional and bending behaviour of a wing structure with large aspect

Problem Set, 1) An investment project requires a net investment of $100,000...

1) An investment project requires a net investment of $100,000. The project is expected to generate annual net cash flows of $28,000 for the next 5 years. The firm''''''''s cost of

Friction welding techniques, Q. Explain briefly the Friction welding techni...

Q. Explain briefly the Friction welding techniques.                                                      OR       Discuss any two solid state welding methods.

Electrometallurgy, explain electrometallurgy for metal extraction process u...

explain electrometallurgy for metal extraction process using a schematic diagram

Physical chemistry, can you answer some problem from physical chemistry wit...

can you answer some problem from physical chemistry with a detailed approach why and how one should choose the steps in solving them.These are just random question that I have no c

Crystal lattice of bcc, Q. Explain crystal lattice of BCC, FCC and HCP. ...

Q. Explain crystal lattice of BCC, FCC and HCP. Ans. (a) BCC (Body centered cubic): Body centered cubic structure, the unit cell, we observe in addition to the atoms at eight

Fire risk assessment in usa - fire protection engineering, Fire risk assess...

Fire risk assessment in USA: The document NFPA 551:2010 is entitled Guide for the Evaluation of Fire Risk Assessments.   In this document is set out the American use of the

Flight control - state feedback, If all states are measured by appropriate ...

If all states are measured by appropriate sensors and interfaced to the flight control computer then allthe states may be fed back and there is no restriction on the choice of K. S

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd