Optimal control/structure integrated design of a flexible space platform with articulated appendages

1991 ◽  
Author(s):  
Atul G. Kelkar ◽  
Thomas E. Alberts
Keyword(s):  
Optimal Control ◽  
Control Structure ◽  
Integrated Design ◽  
Space Platform

scholarly journals Integrated Process Design and Control for Smart Grid Coordinated IGCC Power Plants Using Economic Linear Optimal Control

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 288 ◽  
Author(s):  
Jin Zhang ◽  
Sofia Garcia Fracaro ◽  
Donald J. Chmielewski
Keyword(s):  
Optimal Control ◽  
Smart Grid ◽  
Process Design ◽  
Carbon Capture ◽  
Power Plants ◽  
Integrated Design ◽  
Combined Cycle ◽  
High Price ◽  
Linear Optimal Control ◽  
And Control

The Integrated Gasification Combined Cycle (IGCC) possesses a number of advantages over traditional power generation plants, including increased efficiency, flex-fuel, and carbon capture. A lesser-known advantage of the IGCC system is the ability to coordinate with the smart grid. The idea is that process modifications can enable dispatch capabilities in the sense of shifting power production away from periods of low electricity price to periods of high price and thus generate greater revenue. The work begins with a demonstration of Economic Model Predictive Control (EMPC) as a strategy to determine the dispatch policy by directly pursuing the objective of maximizing plant revenue. However, the numeric nature of EMPC creates an inherent limitation when it comes to process design. Thus, Economic Linear Optimal Control (ELOC) is proposed as a surrogate for EMPC in the formulation of the integrated design and control problem for IGCC power plants with smart grid coordination.

Control-structure integrated design

AIAA Journal ◽  
1992 ◽  
Vol 30 (8) ◽  
pp. 2124-2131 ◽  
Author(s):  
Achille Messac ◽  
Kamal Malek
Keyword(s):  
Control Structure ◽  
Integrated Design

scholarly journals Backlash Fault Suppression Using LQ Optimal Control Based RST Controllers in Wind Turbine Systems Using Bond Graphs and Matlab/Simulink

2021 ◽  
Vol 15 (3) ◽  
pp. 154-163
Author(s):  
Mohamed Arab ◽  
Abederezak Lachouri ◽  
Mohamed Kerikeb ◽  
Lamine Mehennaoui ◽  
Faouzi Bouchareb
Keyword(s):  
Optimal Control ◽  
Wind Turbine ◽  
Dynamic Behaviour ◽  
Control Structure ◽  
Dead Zone ◽  
Torque Control ◽  
Bond Graphs ◽  
Actual System ◽  
Wind Turbine System ◽  
Lq Optimal Control

Abstract The presence of backlash in wind turbines is a source of limitations as it introduces nonlinearities that reduce their efficiency in speed/torque control which affect the performance of the power quality. Because of production tolerances during rotation, the teeth contact is lost for a small angle; until it is re-established, it produces a backlash phenomenon. The desire to eliminate this phenomenon is often hard to realise due to the nonlinear dynamic behaviour, which arises with the presence of backlash fault in a system. Therefore, the goal of this study is to develop an LQ optimal control structure in a form of an R-S-T controller in order to reduce the disturbing torque transmitted inside the dead zone of a gearbox in the wind turbine system. The actual system is also developed to be used as a demonstration model at lectures or presentations. The efficacy of the proposed control is illustrated via simulations.

Optimal Control of a Class of Discrete Multivariable Nonlinear Systems. Application to a Fermentation Process

1982 ◽  
Vol 104 (3) ◽  
pp. 212-217 ◽  
Author(s):  
Joaqui´n Alvarez Gallegos ◽  
Jaime Alvarez Gallegos
Keyword(s):  
Optimal Control ◽  
Nonlinear Systems ◽  
Fermentation Process ◽  
Closed Loop ◽  
Control Structure ◽  
Control Law ◽  
Loop Structure ◽  
Augmented System ◽  
Numerical Integrators ◽  
Multivariable Nonlinear Systems

The optimal control of a class of discrete multivariable nonlinear systems given by: xk+1 = a (xk) + B (xk) uk, yk = C xk, is analyzed. A closed-loop structure is obtained with the proposed performance index. The addition of numerical integrators to the output error and the design of an optimal control law for the resultant augmented system lead to a very robust control structure. The performance of this control law is evaluated by applying it to a simulated continuous culture fermentation process.

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