scholarly journals 2 loop Nonlinear Dynamic Inversion Fuel Flow Controller Design for Air to Air Ducted Ramjet Rocket

2021 ◽  
Vol 71 (2) ◽  
pp. 265-270
Author(s):  
Srikant Srivastava ◽  
P.N. Dwivedi ◽  
D.M. Vinod Kumar
Keyword(s):  
Controller Design ◽  
Angle Of Attack ◽  
Dynamic Inversion ◽  
Atmospheric Conditions ◽  
Gas Generator ◽  
Fuel Flow ◽  
Inner Pressure ◽  
Throttle Valve ◽  
Flow Controller ◽  
Valve Area

Fuel Flow controller based ramjet propulsion system have a flexibility to change rocket velocity depending on guidance requirement by controlling the fuel flow rate as a function of atmospheric conditions like altitude, Mach no. and angle of attack. In this paper, Design objectives & requirements of fuel flow controller have been brought out from guidance loop for air-to-air target engagement. 2-loop non-linear dynamic inversion (DI) based controller design has been proposed to track the commanded thrust and to meet the time constant requirement as a function of altitude, Mach no. and angle of attack. The outer thrust loop is to control commanded thrust and to generate the demand for gas generator pressure loop and inner pressure loop is to meet outer loop demand by controlling throttle valve area. The engine state space plant model has been adapted with improvement of existing model. Throttle valve actuator specifications requirement are also brought out.

scholarly journals Simulation of a Steam Injected Gas Turbine Plant Control System

1997 ◽  
Author(s):  
Shusheng Zang ◽  
Jaqiang Pan
Keyword(s):  
Gas Turbine ◽  
Flow Rate ◽  
Controller Design ◽  
Dynamic Performance ◽  
Linear Quadratic Regulator ◽  
Linear Quadratic ◽  
Turbine Plant ◽  
Fuel Flow ◽  
Lqr Controller ◽  
Gas Turbine Plant

The design of a modern Linear Quadratic Regulator (LQR) is described for a test steam injected gas turbine (STIG) unit. The LQR controller is obtained by using the fuel flow rate and the injected steam flow rate as the output parameters. To meet the goal of the shaft speed control, a classical Proportional Differential (PD) controller is compared to the LQR controller design. The control performance of the dynamic response of the STIG plant in the case of rejection of load is evaluated. The results of the computer simulation show a remarkable improvement on the dynamic performance of the STIG unit.

Reentry Flight Controller Design Using Nonlinear Dynamic Inversion

2003 ◽  
Vol 40 (1) ◽  
pp. 64-71 ◽  
Author(s):  
R. R. da Costa ◽  
Q. P. Chu ◽  
J. A. Mulder
Keyword(s):  
Nonlinear Dynamic ◽  
Controller Design ◽  
Dynamic Inversion ◽  
Nonlinear Dynamic Inversion

scholarly journals Stable H∞ Flow Controller Design

2009 ◽  
Vol 42 (14) ◽  
pp. 319-324
Author(s):  
Hakki UlaŞ Ünal ◽  
Altug İftar
Keyword(s):  
Controller Design ◽  
Flow Controller

scholarly journals Robust Damping Controls for a Unified Power Flow Controller

2006 ◽  
Vol 6 (2) ◽  
Author(s):  
Abu H.M.A. Rahim ◽  
Jamil M Bakhashwain ◽  
Samir A Al-Baiyat
Keyword(s):  
Power Flow ◽  
Controller Design ◽  
Unified Power Flow Controller ◽  
Combined Application ◽  
Damping Control ◽  
Stable Operating ◽  
Wide Range ◽  
Fixed Parameter ◽  
Flow Controller ◽  
Power Flow Controller

This article investigates the various damping controls of the unified power flow controller (UPFC). A detailed dynamic model of the UPFC including the possible damping control parameters has been derived. A method of determining the stable operating states of the nonlinear system model has been presented. Fixed parameter robust controllers for the identified controls have been designed satisfying the robustness conditions on performance and stability. The robust controller design has been carried out with the aid of a simple graphical 'loop-shaping' construction procedure. Simulation studies show that both robust series converter voltage magnitude and shunt converter phase angle provide extremely good damping. Combined application of the above two controls, however, gives the best damping profile over a wide range of operation. PI controllers having optimized gain settings were employed to evaluate the robustness of the proposed controllers.

Adaptive Closed-Loop Control on an Atmospheric Gaseous Lean-Premixed Combustor

2003 ◽  
Author(s):  
A. J. Riley ◽  
S. Park ◽  
A. P. Dowling ◽  
S. Evesque ◽  
A. M. Annaswamy
Keyword(s):  
Time Delay ◽  
Flow Rate ◽  
Atmospheric Conditions ◽  
Loop Control ◽  
Fuel Flow ◽  
Lean Premixed ◽  
Self Tuning ◽  
Industrial Gas Turbine ◽  
Measured Pressure ◽  
Primary Instability

Active control of pressure oscillations has been successfully applied to a lean premixed prevapourised (LPP) combustion rig operating at atmospheric conditions. The design of the rig is based on the primary stage of the Rolls-Royce RB211-DLE industrial gas turbine. Control was achieved by modulating the fuel flow rate in response to a measured pressure signal. The feedback control is an adaptive, model-based self-tuning regulator (STR), which only requires the total time delay between actuation and response to achieve control. The STR algorithm achieves a reduction of up to 30 dB on the primary instability frequency. This performance was an improvement of 5–15 dB over an empirical control strategy (simple time-delay controller) specifically tuned to the same operating point. Initial robustness studies have shown that the STR retains control for a 20% change in frequency and a 23% change in air mass flow rate.

Sign in / Sign up

Export Citation Format

Share Document