The application of LQR synthesis techniques to the turboshaft enginecontrol problem

Pfeil, W. H.; Reyes, G. De Los; Bobula, George A.

doi:10.2514/6.1984-1455

Cited by 3 publications

(4 citation statements)

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“…Through mechanical linkages and gears, the power turbine drives the rotor system of the helicopter such that the rotor angular velocities are directly proportional to power turbine speed. Thus, in the helicopter application, it seems natural to consider the power turbine as part of the rotor system, to which it is mechanically linked [9].…”

Section: Description Of the T700-ge-700 Engine In A Helicopter Applicmentioning

confidence: 99%

“…The observability indices, pi, are evaluated from the observability matrix constructed from the input and output data as explained in [7]. If the observability index, pi, is known, then equation (9) contains the unknown A, B and C matrices for given inputs and outputs. Using a data length of N and a least squares estimation technique, equation (9) can be solved for the unknown parameters.…”

Section: System Identification Using the A-canonical Formmentioning

confidence: 99%

“…Following [91 and Ill], the rotor system is treated as a separate dynamical system with engine shaft torque, Qs, as input and the main rotor speed, N, as output as shown in figure 3. The main rotor speed is assumed to be proportional to the turbine speed by a constant gear ratio since the shaft elements between the hub and the power turbine are nearly rigid[9]. the inputs to the engine are the power turbine speed, Np, and the fuel flow rate, WF.…”

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A Simplified Dynamic Model of the T700 Turboshaft Engine

Duyar

Litt

1995

j am helicopter soc

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A simplified open-loop dynamic model of the T700 turboshaft engine, valid within the normal operating range of the engine, is developed. This model is obtained by linking linear state space models obtained at different engine operating points. Each linear model is developed from a detailed nonlinear engine simulation using a multivariable system identification and realization method. The simplified model may be used with a model-based real time diagnostic scheme for fault detection and diagnostics, as well as for open loop engine dynamics studies and closed loop control analysis utilizing a user generated control law. Nomenclature Variables 'This work was supported by the U.S. Army under grant number NAG3-1198. 14. SUBJECT TERMS 15. NUMBER OF PAGES Real-time simulator; Helicopter engines; Mathematical models 16. PRICE CODE A03 17. SECURITY CLASSIFICATION 18. SECURITY CLASSIFICATION 19. SECURITY CLASSIFICATION 20. LIMITATION OF ABSTRACT OF REPORT OF THIS PAGE OF ABSTRACT Unclassified Unclassified Unclassified NSN 7540-01-280-5500 Standard Form 298 (Rev. 2-89) Prescribed by ANSI Sid Z39-18 298-102

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Section: Description Of the T700-ge-700 Engine In A Helicopter Applicmentioning

confidence: 99%

Section: System Identification Using the A-canonical Formmentioning

confidence: 99%

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confidence: 99%

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A Simplified Dynamic Model of the T700 Turboshaft Engine

Duyar

Litt

1995

j am helicopter soc

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“…Specifications for control design; 2) Evaluation of plant function; 3) Plant mathematical modeling; 4) Plant model validation -open loop simulation; 5) Selection of control strategy; 6) Selection of actuators, sensors; 7) Dynamic modeling of actuators, sensors; 8) Selection of controller action; 9) Theoretical controller design; 10) Controller validation -closed loop simulation; 11) Prototype.…”

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confidence: 99%