Results 11 to 20 of about 195,292 (270)

An Adaptive Control Approach for Discrete-Time Systems with Unknown Backlash at the Input

open access: yesTrends in Computational and Applied Mathematics, 2008
In this paper, we focus on the development of an adaptive control scheme for systems with unknown backlash. More specifically, we propose a discrete timeadaptive backlash inverse based controller for plants that have a known line arpart and an unknown ...
T.S. Santos, F.H.T. Vieira
doaj   +1 more source

Mesh stiffness calculation and vibration analysis of the spur gear pair with tooth crack, considering the misalignment between the base and root circles

open access: yesInternational Journal of Mechanical System Dynamics, 2021
An improved variable cross‐section cantilever beam model for evaluating the time‐varying mesh stiffness (TVMS) of the perfect gear tooth is developed in which the tooth number of driving gear is less than 42 and that of driven is more than 42.
Jingyu Hou   +4 more
doaj   +1 more source

Visual Servo Control of the Macro/Micro Manipulator with Base Vibration Suppression and Backlash Compensation

open access: yesApplied Sciences, 2022
This study investigates the visual servo control of the space station macro/micro manipulator system. The proposed approach is based on the position-based eye-in-hand visual servo (PBVS) and takes advantage of the hardware sensors to overcome the macro ...
Yaowen Zhang   +5 more
doaj   +1 more source

Experimental study on the influence of flexible bearing clearance on natural frequency of harmonic reducer

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2022
Harmonic reducer is a transmission device with high transmission ratio and high accuracy, which is widely used in robotics and other instruments. Backlash reflects the positioning accuracy of harmonic drive, which is one of the key performances of ...
Yazhen WANG, Yipeng CHEN
doaj   +1 more source

A Comprehensive Compensation Method for High-speed Gear Pumps Without the Cavitation Phenomenon

open access: yesJixie chuandong, 2023
In order to improve the cavitation performance under high-speed for external gear pumps, a comprehensive compensation method with the small backlash, innovative annulus relief-groove and increasing inlet oil-pressure is proposed.
Li Yulong, Hou Xinyu, Zhang Lihua
doaj  

Results of research on backlash compensation in a power electric drive by low-power electronic device

open access: yesActa Polytechnica, 2022
This article considers the feasibility of restoring and maintaining the kinematic accuracy of the support-rotary device drives by introducing a backlash compensation device into the control system.
Semen L. Samsonovich   +3 more
doaj   +1 more source

Active Vibration Suppression of Uncertain Hose and Drogue Systems in the Presence of Actuator Nonlinearities

open access: yesIEEE Access, 2020
This paper investigates vibration suppression of uncertain hose and drogue systems in the presence of actuator nonlinearities. Firstly, a previously presented model of the hose and drogue systems is extended to describe how the hose and drogue systems ...
Liang Chang, Takao Ito
doaj   +1 more source

Adaptive Parameter Identification Based Tracking Control of Servo Systems with Unknown Actuator Backlash Compensation

open access: yesActuators
This paper presents a robust tracking control strategy for servo systems with unknown backlash, employing adaptive parameter identification to address performance degradation caused by backlash nonlinearities.
Hailan Du   +3 more
doaj   +1 more source

Dynamic Modeling and Stability Analysis for a Spur Gear System Considering Gear Backlash and Bearing Clearance

open access: yesMachines, 2022
In practice, gear backlash and bearing clearance usually exist together in a gear system. They may induce complicated dynamic responses and degrade transmission performance.
Gang Tian   +3 more
doaj   +1 more source

A Tale of Two Tariff Commissions and One Dubious 'Globalization Backlash' [PDF]

open access: yes, 2006
During much of the previous era of globalization, from the 1860s until the First World War, U. S. tariffs were surprisingly high. Present-day economic historians have suggested that U. S.
Meardon, Stephen
core   +2 more sources

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