Research on Power Regulation Schedule Control System for Turboprop Engine

Tianqian Xia; Xianghua Huang

doi:10.1515/tjj-2018-0023

Artikel

Research on Power Regulation Schedule Control System for Turboprop Engine

Tianqian Xia und Xianghua Huang

Veröffentlicht/Copyright: 27. Juli 2018

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Aus der Zeitschrift International Journal of Turbo & Jet-Engines Band 39 Heft 2

Abstract

A method of variable speed control system for turboprop engine is presented in this paper. Firstly, the steady operation state of turboprop engine is analyzed, and the operating line is figured out in the steady state characteristic diagram, which is the design basis of Engine Thrust Management System (ETMS). Secondly, the reference model sliding mode multivariable control is used to design the control law to follow the speed instructions given by ETMS. Finally, the optimization of the minimum fuel consumption operating curve is realized, and the control system designed is applied to a numerical model of a turboprop engine. The simulation results show that compared with the constant speed control system, the variable speed control system can reduce the specific fuel consumption by 2.37 % on average and 3.1 % in steady state conditions. Furthermore, the method can enable the pilot to manipulate the turboprop aircraft by using only one throttle lever, which can greatly reduce the pilot operation burden.

Keywords: turboprop engine; sliding mode control; power regulation schedule; one hand level operation

JEL Classification: 07.07.Tw; 45.80.+r; 87.19.lr

Funding statement: This work was supported by Foundation of Graduate Innovation Center in NUAA (kfjj20170218) and supported by “the Fundamental Research Funds for the Central Universities”. The authors also wish to thank the financial support from the National Natural Science Foundation of China (51576097).

Nomenclature

ETMS: Engine Thrust Management System
PLA: Power Lever Angle
CLA: Condition Lever Angle
FADEC: Full Authority Digital Electronic Control
LQR: Linear Quadratic Regulator
SFC: Specific Fuel Consumption
MRSMC: Model Reference Sliding Mode Controller
W f: fuel flow (kg/s)
φ: pitch angle (rad)
F t arg: target thrust (N)
T t 1: total temperature of atmosphere (K)
T t 2: total temperature of inlet of compressor (K)
n h , g i v e: corrected rotational speed command of the high pressure rotor (rpm)
n l , g i v e: corrected rotational speed command of the low pressure rotor (rpm)
n l , c m d: speed command of the low pressure rotor (rpm)
n p: propeller speed (rpm)
n p , c m d: propeller speed command (rpm)
n p , o p t: optimal propeller speed (rpm)
n h: core engine speed (rpm)
n h , c m d: core engine speed command (rpm)
P: power absorbed by propeller (W)
p c m d: command of power absorbed by propeller (W)

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Received: 2018-07-05

Accepted: 2018-07-12

Published Online: 2018-07-27

Published in Print: 2022-05-25

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Artikel in diesem Heft

https://doi.org/10.1515/tjj-2018-0023

Schlagwörter für diesen Artikel

turboprop engine; sliding mode control; power regulation schedule; one hand level operation