A 4th-order active-Gm-RC low-pass filter with RC time constant auto-tuning for reconfigurable wireless receivers

2012 ◽  
Author(s):  
Liu Junbo ◽  
Fan Xiangning ◽  
Bao Kuan
Keyword(s):  
Time Constant ◽  
Wireless Receivers ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Auto Tuning ◽  
Rc Time Constant

scholarly journals A 5.5mW 80-400MHz Gm-C low pass filter with a unique auto-tuning system

2011 ◽  
Vol 8 (13) ◽  
pp. 1034-1039 ◽  
Author(s):  
Ting Gao ◽  
Wei Li ◽  
Yunfeng Chen ◽  
Ning Li ◽  
Junyan Ren
Keyword(s):  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Auto Tuning

Application of IMC-PID in the Hydraulic Headbox Total Pressure Control

2012 ◽  
Vol 462 ◽  
pp. 789-795
Author(s):  
Wei Tang ◽  
Xu Zhong Niu ◽  
Wen Juan Shan
Keyword(s):  
Control System ◽  
Time Constant ◽  
Total Pressure ◽  
Pressure Control ◽  
Internal Model Control ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Model Control ◽  
Low Pass ◽  
Pressure Control System

It is very difficult to obtain perfect performance to apply the conventional PID (Proportional-Integral-Derivative) controller, because hydraulic headbox needs high precision total pressure control. Transfer function of total pressure control system was identified by using the direct identification method which is based on the least square method for the first-order plus delay time model. Then combined with IMC (Internal-Model-control) –PID method, an IMC-PID controller was designed, which is simple and only needed to adjust one parameter-the time constant of low pass filter. Acceptable performance can also be obtained by tuning time constant of the low pass filter when the model doesn't match with the real process. The algorithm was applied to total pressure control system of hydraulic headbox. Simulation and practical application show that, IMC-PID is of strong robustness and good dynamic characteristics. Finally, the control system is implemented by S7-300 PLC.

Compensation of Stribeck-Type Nonlinear Friction in Positioning Control Using Equivalent-Input-Disturbance Approach

2014 ◽  
Vol 18 (2) ◽  
pp. 150-156 ◽  
Author(s):  
Qi Shi ◽  
◽  
Liyu Ouyang ◽  
Jinhua She ◽  
Li Xu ◽  
...  
Keyword(s):  
Time Constant ◽  
Friction Torque ◽  
Control Input ◽  
Nonlinear Friction ◽  
Mechatronic System ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Positioning Control ◽  
Low Pass ◽  
Simulation Results

A method of compensating for Stribeck-type nonlinear friction torque for a two-mass mechatronic system has been devised based on the equivalent-inputdisturbance (EID) approach. The nonlinearity in the system is treated as an input-dependent disturbance, and an EID estimator is designed that estimates it. The incorporation of the estimate into the control input compensates for the nonlinearity. Simulation results demonstrate the validity of the method and show that the compensation accuracy is closely related to the time constant of the low-pass filter.

Design of Programmable Wideband Low Pass Filter with Continuous-Time/Discrete-Time Hybrid Architecture

2017 ◽  
Vol E100.C (10) ◽  
pp. 858-865 ◽  
Author(s):  
Yohei MORISHITA ◽  
Koichi MIZUNO ◽  
Junji SATO ◽  
Koji TAKINAMI ◽  
Kazuaki TAKAHASHI
Keyword(s):  
Discrete Time ◽  
Continuous Time ◽  
Hybrid Architecture ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass
Sign in / Sign up

Export Citation Format

Share Document