Friction Compensation
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Controle em cascata e a estrutura variável com adaptação de parâmetros e compensação de atrito de um servoposicionador pneumático / Variable structure cascade control with parameter adaption and friction compensation applied to a pneumatic positioning system
Este trabalho discute o problema do controle preciso do seguimento de trajetórias de um servoposicionador pneumático. Um modelo matemático para o servoposicionador pneumático é apresentado, com atenção especial sendo dada à modelagem dos efeitos do atrito. Para a representação desses efeitos, é proposta uma modificação da estrutura matemática d
Publicado em: 2009
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2. Compensação de atrito em válvulas de controle. / Friction compensation in control valves.
Friction is a nonlinearity that generally produces bad performance of a mechanical system with moving parts. In this work, the studied mechanical element is the process control valve, which is the most used final control element in process industries. The presence of friction in control valves increases control loop variability, generating impact in all plan
Publicado em: 2008
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3. Cascade controlled pneumatic positioning system with LuGre model based friction compensation
This paper proposes a cascade controller with friction compensation based on the LuGre model. This control is applied to a pneumatic positioning system. The cascade methodology consists of dividing the pneumatic positioning system model into two subsystems: a mechanical subsystem and a pneumatic subsystem. This division allows the introduction of friction co
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-03
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4. A new robotic drive joint friction compensation mechanism using neural networks
The knowledge of realistic dynamic models to robotic actuators would be of great aid in the synthesis of control laws to robot manipulators, mainly in cases of great precision robotic or even for manipulators with flexible links. In this paper we present a training scheme and propose a structure of neural network (NN) to learn the friction torque of a geared
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-04
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5. Experimental study applied to an industrial robot by using variable structure controllers and friction compensation
Control of an industrial robot is mainly a problem of dynamics. It includes non-linearities, uncertainties and external perturbations that should be considered in the design of control laws. In this work, two control strategies based on variable structure controllers (VSC) and a PD control algorithm are compared in relation to the tracking errors considering
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-11