The input amplitude saturation problem in QFT: A survey

<p>Photonic ring waveguide resonators have great potential applications in wavelength filtering, switching, modulation and multiplexing. The response of coupled ring resonators can be designed by using various coupling configurations. Particularly, ring resonators can be used as wavelength filter when the wavelength fits a whole multiple times in the circumference of the ring. In this paper, we investigate the effect of input amplitude to power amplification in four ring resonator configurations and vary the input amplitude on five different wavelengths. With OptiFDTD Photonics Simulation Software V8.0, the results show the intensity phenomenon of filtering in optical circuit.</p><p> </p>

Download Full-text

Vibration and Position Control of Overhead Crane With Three-Dimensional Variable Length Cable Subject to Input Amplitude and Rate Constraints

IEEE Transactions on Systems Man and Cybernetics Systems ◽

10.1109/tsmc.2019.2930815 ◽

2019 ◽

pp. 1-12 ◽

Cited By ~ 2

Author(s):

Xueyan Xing ◽

Jinkun Liu

Keyword(s):

Position Control ◽

Three Dimensional ◽

Variable Length ◽

Overhead Crane ◽

Input Amplitude ◽

Dimensional Variable ◽

Rate Constraints

Download Full-text

Saturated Tracking Control for Input Amplitude Constrained Linear Systems in the Presence of the Energy-bounded Disturbances

2019 Chinese Control Conference (CCC) ◽

10.23919/chicc.2019.8865477 ◽

2019 ◽

Author(s):

Zhongyi Gong ◽

Jian Ma

Keyword(s):

Linear Systems ◽

Tracking Control ◽

Input Amplitude ◽

Constrained Linear Systems ◽

Bounded Disturbances

Download Full-text

A wide input amplitude range, highly efficient rectifier for low power energy harvesting systems

Nonlinear Theory and Its Applications IEICE ◽

10.1587/nolta.5.499 ◽

2014 ◽

Vol 5 (4) ◽

pp. 499-511 ◽

Cited By ~ 4

Author(s):

Qiang Li ◽

Jing Wang ◽

Li Ding ◽

Yasuaki Inoue

Keyword(s):

Energy Harvesting ◽

Low Power ◽

Highly Efficient ◽

Input Amplitude ◽

Harvesting Systems

Download Full-text

Experimental Response of a Preloaded Vibro-Impacting Hertzian Contact

Volume 6B: 18th Biennial Conference on Mechanical Vibration and Noise ◽

10.1115/detc2001/vib-21547 ◽

2001 ◽

Author(s):

Emmanuel Rigaud ◽

Joël Perret-Liaudet

Keyword(s):

Dynamic Behaviour ◽

Damping Ratio ◽

Primary Resonance ◽

External Input ◽

Hertzian Contact ◽

Normal Forces ◽

Linear Dynamic ◽

Input Amplitude ◽

Linear Resonance ◽

Amplitude System

Abstract This paper concerns the non-linear dynamic response of a vibro-impacting Hertzian contact. Sinusoidal and random external normal forces are considered. We focus on the primary resonance and include vibro-impact responses in order to analyze the main characteristics of the system associated to both Hertzian and contact loss non-linearities. Under very small input amplitude, contact exhibits an almost linear resonance. Linearized resonance frequency and damping ratio are identified. Increasing the external input amplitude, the softening behaviour induced by Hertzian nonlinear stiffness is clearly demonstrated for both sinusoidal and random inputs. For higher input amplitude, system exhibits vibro-impacts. The contact loss non-linearity strongly governs the dynamic behaviour of the system.

Download Full-text

Consistent Total Traction Torque-Oriented Coordinated Control of Multimotors with Input Saturation for Heavy-Haul Locomotives

Journal of Advanced Transportation ◽

10.1155/2020/1390764 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11

Author(s):

Changfan Zhang ◽

Qian Zhang ◽

Jing He ◽

Jianhua Liu ◽

Xingxing Yang ◽

...

Keyword(s):

Sliding Mode ◽

Characteristic Curve ◽

Input Saturation ◽

Coordinated Control ◽

Mode Switching ◽

Control Input ◽

Saturation Problem ◽

Parameter Perturbations ◽

Heavy Haul ◽

Traction Characteristic

In the coordinated control of multiple motors for heavy-haul locomotives, the input value for a motor often exceeds its maximum allowable input value, resulting in the saturation problem. A traction total-amount coordinated tracking control (TACTC) strategy is proposed to address the input saturation of heavy-haul locomotives driven by multiple motors. This strategy reduces control input and suppresses input saturation. First, a multimotor traction model with uncertain parameter perturbations and external disturbances was established. Next, a sliding-mode disturbance observer (SMDO) was designed to reduce the sliding-mode switching gain, thereby decreasing the control input. An auxiliary anti-windup (AW) system was used to weaken the effect of input saturation on tracking performance. Then, the observed value and auxiliary state were fed back to the sliding-mode controller to design a TACTC protocol and ensure that the total amount of traction torque follows the desired traction characteristic curve. Finally, the Matlab/Simulink simulation and RT-Lab semiphysical experiment results show that the proposed strategy can effectively suppress the input saturation problem of multimotor coordinated control.

Download Full-text