Improved disturbance rejection with online adaptive pole-zero compensation on a Φ-shaped PZT active suspension

2009 ◽  
Vol 15 (10-11) ◽  
pp. 1499-1508 ◽  
Author(s):  
Chee Khiang Pang ◽  
Sai Cheong Tam ◽  
Guoxiao Guo ◽  
Ben M. Chen ◽  
Frank L. Lewis ◽  
...  
Keyword(s):  
Disturbance Rejection ◽  
Active Suspension

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.

Modified active disturbance rejection control for non-linear semi-active vehicle suspension with magneto-rheological damper

2017 ◽  
Vol 40 (8) ◽  
pp. 2611-2621 ◽  
Author(s):  
Mingxing Cheng ◽  
Xiaohong Jiao
Keyword(s):  
Disturbance Rejection ◽  
Ride Comfort ◽  
Control Strategies ◽  
Active Suspension ◽  
The Body ◽  
Active Disturbance Rejection Control ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Road Disturbance ◽  
Non Linear

This paper presents a novel idea processing the complex non-linear dynamics of a magneto-rheological (MR) damper and the external road disturbance based on the linear extended state observer (LESO) technology, and further verifies its reasonability by application of linear active disturbance rejection control (LADRC) in the quarter-car non-linear semi-active suspension system. In order to optimize the body acceleration and dynamic tyre load to improve the ride comfort and road-handling ability, a modified active disturbance rejection control, the double linear active disturbance rejection control (DLADRC), is further proposed based on the idea of the hybrid skyhook–groundhook control strategy. LESO is used to estimate the total disturbance including the external road disturbance and the internal non-linear dynamic of the MR damper. For effectiveness validation of the proposed control scheme, comparison results with the existing linear quadratic regulation (LQR) control, hybrid skyhook–groundhook control and adaptive control strategies are presented for the same quarter-car semi-active suspension. It is shown from the simulation comparisons among these several control strategies that the semi-active suspension system with DLADRC has a better control performance on the ride comfort and road-handling ability corresponding to the body acceleration and dynamic tyre load.

Sign in / Sign up

Export Citation Format

Share Document