Study on the applicability of instrumental measures for black-box evaluation of static feedback control in hearing aids

2011 ◽  
Vol 130 (2) ◽  
pp. 933-947 ◽  
Author(s):  
N. Madhu ◽  
J. Wouters ◽  
A. Spriet ◽  
T. Bisitz ◽  
V. Hohmann ◽  
...  
Keyword(s):  
Feedback Control ◽  
Hearing Aids ◽  
Black Box ◽  
Static Feedback

scholarly journals Synchronization Control of Time-Varying Complex Dynamic Network with Nonidentical Nodes and Coupling Time-Delay

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Youjian Zhang ◽  
Wenjun Yan ◽  
Qiang Yang
Keyword(s):  
Time Delay ◽  
Feedback Control ◽  
Complex Networks ◽  
Hybrid Control ◽  
Dynamic Network ◽  
Time Varying ◽  
Static Feedback ◽  
Control Schemes ◽  
Coupling Time ◽  
Nonidentical Nodes

This paper addresses the synchronization problem for a class of complex networks with time-varying topology as well as nonidentical nodes and coupling time-delay and presents two efficient control schemes to synchronize the network onto any given smooth goal dynamics. The time-varying network is supposed to be bounded within a certain range, which cannot be controlled. Through the adoption of hybrid control with linear static feedback control and adaptive feedback control, two control schemes are derived to guarantee such complex networks to reach the global synchronization. Finally, a set of numerical simulation experiments are carried out and the results demonstrate the effectiveness of the suggested control solutions.

Two-Microphone Hearing Aids Using Prediction Error Method for Adaptive Feedback Control

2018 ◽  
Vol 26 (5) ◽  
pp. 909-923 ◽  
Author(s):  
Linh Thi Thuc Tran ◽  
Sven Erik Nordholm ◽  
Henning Schepker ◽  
Hai Huyen Dam ◽  
Simon Doclo
Keyword(s):  
Feedback Control ◽  
Hearing Aids ◽  
Prediction Error ◽  
Adaptive Feedback ◽  
Adaptive Feedback Control ◽  
Error Method

Force Feedback Control for Active Stabilization of Synchronous Whirl Orbits in Rotor Systems With Non-Linear Stiffness Elements

2010 ◽  
Author(s):  
Matthew O. T. Cole ◽  
Chakkapong Chamroon ◽  
Prinya Ngamprapasom
Keyword(s):  
Feedback Control ◽  
Direct Method ◽  
Synthesis Method ◽  
Magnetic Bearing ◽  
Transverse Plane ◽  
Radial Clearance ◽  
Rotor Systems ◽  
Static Feedback ◽  
Non Linear ◽  
Low Amplitude

Synchronous vibration in rotor systems having bearings, seals or other elements with non-linear stiffness characteristics is prone to amplitude jump when operating close to critical speeds as there may be two or more possible whirl responses for a given unbalance condition. This paper describes research on the use of active control methods for eliminating this potentially undesirable behavior. A control scheme based on direct feedback of rotor-stator interaction forces is considered. Model based conditions for stability of low amplitude whirl, derived using Lyapunov’s direct method, are used as a basis for synthesizing controller gains. Subsidiary requirements for existence of a static feedback control law that can achieve stabilization are also explained. An experimental validation is undertaken on a flexible rotor test rig where non-linear rotorstator contact interaction can occur across a small radial clearance in one transverse plane. A single radial active magnetic bearing is used to apply control forces in a separate transverse plane. The experiments confirm the conditions under which static feedback of the measured interaction force can prevent degenerate whirl responses so that the low amplitude contact-free orbit is the only possible steady-state response. The gain synthesis method leads to controllers that are physically realizable and can eliminate amplitude jump over a range of running speeds.

Sign in / Sign up

Export Citation Format

Share Document