Adaptive narrow band disturbance rejection applied to an active suspension—an internal model principle approach

Automatica ◽  
2005 ◽  
Vol 41 (4) ◽  
pp. 563-574 ◽  
Author(s):  
Ioan Doré Landau ◽  
Aurelian Constantinescu ◽  
Daniel Rey
Keyword(s):  
Disturbance Rejection ◽  
Internal Model ◽  
Narrow Band ◽  
Active Suspension ◽  
Internal Model Principle

Control of a Helicopter Main Gearbox Active Suspension System

2014 ◽  
Author(s):  
Jonathan Rodriguez ◽  
Luc Gaudiller ◽  
Simon Chesne ◽  
Paul Cranga
Keyword(s):  
Disturbance Rejection ◽  
Control Algorithm ◽  
Narrow Band ◽  
Active Suspension ◽  
Frequency Bandwidth ◽  
Active System ◽  
Multibody Model ◽  
Suspension Systems ◽  
Set Up ◽  
New Generation

This paper considers the control of a helicopter gearbox electromagnetic suspension for a complete multibody model of the structure. As the new generation of helicopters includes variable engine RPM during flight, it becomes relevant to add active control in their suspension systems. Most of active system performances derive directly from the controller construction, its optimization to the system controlled and the disturbances expected. An investigation on a FXLMS control algorithm has been made to optimize it in terms of narrow band disturbance rejection. In this paper an active suspension based on DAVI principle is evaluated. Firstly, a multibody model is set up to estimate realistic acceleration levels inside the cabin. Then multiple controllers are tested, minimizing vibrations on different parts of the helicopter structure. The simulations tend to prove that it is possible to implement an effective active suspension with a low power actuator and obtain a significant vibration reduction level for a frequency bandwidth centered at the natural frequency of the original DAVI.

scholarly journals Design of the impact controlling structure applying conventional digital control laws

2005 ◽  
Vol 18 (3) ◽  
pp. 361-377
Author(s):  
Milic Stojic ◽  
Milan Matijevic
Keyword(s):  
Digital Control ◽  
Disturbance Rejection ◽  
Internal Model ◽  
Design Procedure ◽  
Experimental Setup ◽  
External Disturbances ◽  
Control Laws ◽  
Internal Model Principle ◽  
And Control ◽  
The Impact

The design of a simplified IMPACT (Internal Model Principle and Control Together) structure comprising conventional digital control laws is presented. The design procedure is accomplished to enable the extraction of a known class of immeasurable external disturbances and easy setting of the controller parameters. In the proposed controlling structure, the set point transient response and speed of disturbance rejection can be adjusted independently. The efficiency and robustness of the proposed controlling structure are verified and tested by the simulation and experimental setup.

K-Fold Exosystem and the Robust Nonlinear Servomechanism Problem

1998 ◽  
Vol 120 (1) ◽  
pp. 149-153 ◽  
Author(s):  
Jie Huang
Keyword(s):  
Feedback Control ◽  
Nonlinear Systems ◽  
Output Feedback ◽  
Disturbance Rejection ◽  
Internal Model ◽  
Output Feedback Control ◽  
Uncertain Nonlinear Systems ◽  
Internal Model Principle ◽  
Asymptotic Tracking

Asymptotic tracking and disturbance rejection in uncertain nonlinear systems is studied in the context of output feedback control. This study is facilitated by formalizing the notion of k-fold exosystem and generalizing the internal model principle to the nonlinear setting.

scholarly journals Optimal Disturbance Rejection with Zero Steady-State Error for Nonlinear Vehicle Suspension Systems under Persistent Road Disturbances

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Xiao-Fang Zhong ◽  
Shi-Yuan Han ◽  
Xi-Xin Yang ◽  
Yuan-Lin Guan ◽  
Jin Zhou
Keyword(s):  
Steady State ◽  
Disturbance Rejection ◽  
Active Suspension ◽  
The Road ◽  
Internal Model Principle ◽  
Power Spectral ◽  
Road Roughness ◽  
Road Disturbance ◽  
Control System Model ◽  
State Error

The road disturbance rejection problem for vehicle active suspension involving the nonlinear characteristics is researched in this paper. A continuous-time state space of nonlinear vehicle active suspension is established first, in which the road disturbance is generated from the output of an introduced exosystem based on the ground displacement power spectral density. After that, based on the dynamics of road roughness and the internal model principle, a disturbance compensator with zero steady-state error is designed, which is related to the dynamic characteristics of road disturbance and independent of the control system model. By combining the vehicle active suspension system and the designed road disturbance compensator, an augmented system is obtained without explicit indication of road disturbance. Then by solving a series of decoupled nonlinear two-point-boundary-value problem and employing an iterative computing algorithm, an approximation optimal road disturbance rejection controller is obtained. Finally, the simulation results illustrate that the proposed approximation optimal road disturbance rejection controller can reduce the values of sprung mass acceleration, tire deflection, suspension deflection, and energy consumption and compensate the nonlinear behaviors of vehicle active suspension effectively.

Sign in / Sign up

Export Citation Format

Share Document