Loop Shaping Control Design for a Supersonic Propulsion System Model Using QFT Specifications and Bounds

2010 ◽  
Author(s):  
Joseph Connolly ◽  
George Kopasakis
Keyword(s):  
Control Design ◽  
Propulsion System ◽  
System Model ◽  
Loop Shaping

Unfalsified control design using a generalized cost function for a quadrotor

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Azam Hokmabadi ◽  
Mahdi Khodabandeh
Keyword(s):  
Adaptive Control ◽  
Cost Function ◽  
Sliding Mode ◽  
Control Design ◽  
Robust Adaptive Control ◽  
Operating Conditions ◽  
System Model ◽  
Reference Trajectory ◽  
Content Type ◽  
Generalized Cost

Purpose The purpose of this paper is to design a controller for a quadrotor only by using input–output data without a need for the system model. Design/methodology/approach Tracking control for the quadrotor is considered by using unfalsified control, which is one of the most recent strategies of robust adaptive control. The main assumption in unfalsified control design is that there is no access to the system model. Also, ideal path tracking and controlling the quadrotor are been paid attention to in the presence of external disturbances and uncertainties. First, unfalsified control method is introduced which is a data-driven and model-free approach in the field of adaptive control. Next, model of the quadrotor and unfalsified control design for the quadrotor are presented. Second, design of a control bank consisting of four proportional integral derivative controllers and a sliding mode controller is carried out. Findings A particular innovation on an unfalsified control algorithm in this paper is use of a generalized cost function in the hysteresis switching algorithm to find the best controller. Originality/value Finally, the performance and robustness of the designed controllers are investigated by simulation studies in various operating conditions including reference trajectory changes, facing to wind disturbance, uncertainty of the system and changes in payload, which show acceptable performances.

An extremum seeking approach to parameterised loop-shaping control design

2014 ◽  
Vol 47 (3) ◽  
pp. 10251-10256
Author(s):  
Chih Feng Lee ◽  
Sei Zhen Khong ◽  
Erik Frisk ◽  
Mattias Krysander
Keyword(s):  
Control Design ◽  
Extremum Seeking ◽  
Loop Shaping

A loop-shaping technique for feedback control design

1996 ◽  
Vol 20 (1) ◽  
pp. 27-37 ◽  
Author(s):  
O. Agamennoni ◽  
J.L. Figueroa ◽  
A.C. Desages ◽  
A. Palazoglu ◽  
J.A. Romagnoli
Keyword(s):  
Feedback Control ◽  
Control Design ◽  
Shaping Technique ◽  
Loop Shaping

Stabilization of Mechanical Systems with Backlash by PI Loop Shaping

2016 ◽  
Vol 5 (3) ◽  
pp. 21-46 ◽  
Author(s):  
Ahmad Taher Azar ◽  
Fernando E. Serrano
Keyword(s):  
Control Design ◽  
Theoretical Background ◽  
System Behavior ◽  
Describing Function ◽  
Pendulum System ◽  
Loop Shaping ◽  
Control Gain ◽  
Different Types ◽  
Electrical Motors ◽  
Frequency Domain Approach

Backlash is one of several discontinuities found in different kinds of systems, it can be found in actuators of different types, such as mechanical and hydraulic, giving way to unwanted effects in the system behavior. PI loop shaping control design implementing a describing function to find the limit cycle oscillations and the appropriate control gain is developed. Therefore a frequency domain approach is implemented for the control of nonlinear system of any kind such as robotics, mechatronics, other kind of mechanisms, electrical motors etc. Finally, in order to corroborate the theoretical background explained in this article, the stabilization of a cart-pendulum system with the proposed control strategy is shown.

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