Abstract
A novel control method combining nonlinear model predictive control (NMPC) with linear kalman filter (LKF) and adaptive notch filter (ANF) for an integrated helicopter/engine system with variable rotor speed is proposed to enhance the response ability of turboshaft engine. Firstly, based on the integrated helicopter/engine model with variable rotor speed, an ANF combined with frequency estimation is introduced. Then, in order to estimate the significant and unmeasurable performance parameters utilized in model predictive control, such as temperature before turbine, a nonlinear model predictive controller based on LKF is presented. The simulation verifications demonstrate that the fundamental frequency of torsional vibration changes from 1.30 Hz to 2.70 Hz when the rotor speed varies continuously by 50 %. In this case, compared with the notch filter, all torsional vibration amplitudes are damped below 0.1 % by ANF. Meanwhile, in comparison with the PID controller, the NMPC can reduce the overshoot and droop of the power turbine speed to less than 1 % with steady-state error no more than 0.5 % at the off-design point of NMPC based on adaptive torsional vibration suppression. The applications of LKF and similar transformation improve the control accuracy and robustness performance of the NMPC designed at a single operating point.
Funding statement: The work has been co-supported by the National Natural Science Foundation of China (Grant/Award Number: 51576096), Qing Lan, 333 Project and Research Funds for Central Universities (No. NF2018003).
Nomenclature
- Symbol
-
Explanation
- Np
-
Relative speed of power turbine [%]
- Npr
-
Reference speed of power turbine [%]
- Nc
-
Relative speed of compressor [%]
- Wfb
-
Fuel flow [kg/s]
- TE
-
Engine output torque [kN•m]
- TMR
-
Main rotor torque [kN•m]
- ΩMR
-
Main rotor speed [rad/s]
- θ pitch
-
Rotor collective pitch [°]
- vc
-
Forward speed [m/s]
- T 4*
-
Temperature before turbine [K]
- pcl1
-
Applied pressure to high-speed clutch [psi]
- pcl2
-
Applied pressure to low-speed clutch [psi]
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© 2019 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Editorial
- Study on Global Aerodynamic Shape Optimization of Transonic Compressor Blade
- Original Research Articles
- The Migration of Corner Separation Flow in Multi-Channel Compressor Cascades at High Attack Angle
- Water Film Formation and Performance Effect on Compressor Stage in Water Injection Process
- A Novel Reliability Analysis Method for Turbine Discs with the Mixture of Fuzzy and Probability-Box Variables
- Numerical Study of Unsteady Pulsed Suction through Endwall Bleed Holes in a Highly Loaded Compressor Cascade
- A Study on Torsional Vibration Suppression Method for an Integrated Helicopter / Engine System
- Numerical Simulation of Supersonic Jet Control by Tabs with Slanted Perforation
- Effect of Gurney Flaps on the Aerodynamic Characteristics of NACA 0010 Cascades
- A Study on Nonlinear Model Predictive Control for Helicopter/Engine with Variable Rotor Speed Based on Linear Kalman Filter
- Performance Characteristic Modeling for 2D Compressor Cascades
- Numerical Investigation on Metrological Fidelity of a Shielded Thermocouple Probe and the Effects of Geometrical Parameters
- Experimental Study of Kerosene Ignition and Flame Stabilization in a Supersonic Combustor
- Metaheuristics Optimized Machine Learning Modelling of Environmental Exergo-Emissions for an Aero-Engine
- Nonlinear Model Predictive Control Strategy for Limit Management of Aero-Engines
- Numerical Investigation on the Cold Flow Field of a Typical Cavity-based Scramjet Combustor with Double Ramp Entry
Articles in the same Issue
- Frontmatter
- Editorial
- Study on Global Aerodynamic Shape Optimization of Transonic Compressor Blade
- Original Research Articles
- The Migration of Corner Separation Flow in Multi-Channel Compressor Cascades at High Attack Angle
- Water Film Formation and Performance Effect on Compressor Stage in Water Injection Process
- A Novel Reliability Analysis Method for Turbine Discs with the Mixture of Fuzzy and Probability-Box Variables
- Numerical Study of Unsteady Pulsed Suction through Endwall Bleed Holes in a Highly Loaded Compressor Cascade
- A Study on Torsional Vibration Suppression Method for an Integrated Helicopter / Engine System
- Numerical Simulation of Supersonic Jet Control by Tabs with Slanted Perforation
- Effect of Gurney Flaps on the Aerodynamic Characteristics of NACA 0010 Cascades
- A Study on Nonlinear Model Predictive Control for Helicopter/Engine with Variable Rotor Speed Based on Linear Kalman Filter
- Performance Characteristic Modeling for 2D Compressor Cascades
- Numerical Investigation on Metrological Fidelity of a Shielded Thermocouple Probe and the Effects of Geometrical Parameters
- Experimental Study of Kerosene Ignition and Flame Stabilization in a Supersonic Combustor
- Metaheuristics Optimized Machine Learning Modelling of Environmental Exergo-Emissions for an Aero-Engine
- Nonlinear Model Predictive Control Strategy for Limit Management of Aero-Engines
- Numerical Investigation on the Cold Flow Field of a Typical Cavity-based Scramjet Combustor with Double Ramp Entry