Research and Development of Ultrasonic Frequency Dual Closed-Loop Control Tracking System Based on the STM32 and Phase Inspection Circuit

A 3-PRR (three links with each link consisting of a prismatic pair and two rotating pairs) parallel platform was designed for application in a vacuum environment. To meet the requirement of high tracking accuracy of the 3-PRR parallel platform, a full closed-loop control precision tracking system with laser displacement sensors and linear grating encoders was analysed and implemented. Equally-spaced laser displacement sensors and linear grating encoders were adopted not only for measurement but also for feedback control. A feed-forward control method was applied for comparison before conducting the closed-loop feedback control experiments. The closed-loop control experiments were conducted by adopting the PI (proportion and integration) feedback control and RBF (radial basis function) neural network control algorithms. The experimental results demonstrate that the feed-forward control, PI feedback control, and RBF neural-network control algorithms all have a better control effect than that of semi-closed-loop control, which proves the validity of the designed full closed-loop control system based on the combination of laser displacement sensors and linear grating encoders.

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Full-gap tracking system for parallel plate electrostatic actuators using closed-loop control

Sensors and Actuators A Physical ◽

10.1016/j.sna.2016.04.002 ◽

2016 ◽

Vol 244 ◽

pp. 174-183 ◽

Cited By ~ 3

Author(s):

Eurico Esteves Moreira ◽

Vasco Lima ◽

Filipe Serra Alves ◽

Jorge Cabral ◽

João Gaspar ◽

...

Keyword(s):

Parallel Plate ◽

Closed Loop ◽

Tracking System ◽

Closed Loop Control ◽

Electrostatic Actuators ◽

Loop Control

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High-bandwidth fine tracking system for optical communication with double closed-loop control method

Optical Engineering ◽

10.1117/1.oe.58.2.026102 ◽

2019 ◽

Vol 58 (02) ◽

pp. 1

Author(s):

Yukun Wang ◽

Dayu Li ◽

Rui Wang ◽

Chengbin Jin ◽

Shaoxin Wang ◽

...

Keyword(s):

Optical Communication ◽

Closed Loop ◽

Control Method ◽

Tracking System ◽

Closed Loop Control ◽

Loop Control ◽

High Bandwidth

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Infrared small target detection and tracking algorithm based on new closed-loop control particle filter

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/0954410017753445 ◽

2018 ◽

Vol 233 (4) ◽

pp. 1435-1456

Author(s):

Zhimin Chen ◽

Mengchu Tian ◽

Yuming Bo ◽

Xiaodong Ling

Keyword(s):

Particle Filter ◽

Particle Filtering ◽

Closed Loop ◽

Tracking System ◽

Bat Algorithm ◽

Closed Loop Control ◽

Small Target ◽

Loop Control ◽

Detection And Tracking ◽

Infrared Small Target

The problem of particle impoverishment could be always found in standard particle filter, additionally a large number of particles are required for accurate estimation. as it is difficult to meet the demand of modern infrared search and tracking system. To solve this problem, an improved infrared small target detection and tracking method based on closed-loop control bat algorithm optimized particle filter is proposed. Firstly, bat algorithm is introduced into the particle filtering in this method. Particles are used to simulate the process that an individual bat hunts and avoids obstacles so that particles move towards the high-likelihood region. Meanwhile, the improved algorithm takes the proportion of particles accepting a new state as the feedback quantity and proposes to conduct dynamic control on global and local search ability of particle filtering by closed-loop control strategy, which further improves the overall quality of particle distribution. The performance of the improved detection and tracking algorithm is tested in simulation scene and real scene of infrared small target. Experimental results show that the improved algorithm improves the performance of the infrared searching and tracking system.

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The Impact of Visual Feedback Type on the Mastery of Visuo-Motor Transformations

Zeitschrift für Psychologie ◽

10.1027/2151-2604/a000084 ◽

2012 ◽

Vol 220 (1) ◽

pp. 3-9 ◽

Cited By ~ 4

Author(s):

Sandra Sülzenbrück

Keyword(s):

Empirical Research ◽

Visual Feedback ◽

Closed Loop ◽

Motor Planning ◽

Visual Input ◽

Closed Loop Control ◽

Loop Control ◽

Feedback Type ◽

Effective Use ◽

The Impact

For the effective use of modern tools, the inherent visuo-motor transformation needs to be mastered. The successful adjustment to and learning of these transformations crucially depends on practice conditions, particularly on the type of visual feedback during practice. Here, a review about empirical research exploring the influence of continuous and terminal visual feedback during practice on the mastery of visuo-motor transformations is provided. Two studies investigating the impact of the type of visual feedback on either direction-dependent visuo-motor gains or the complex visuo-motor transformation of a virtual two-sided lever are presented in more detail. The findings of these studies indicate that the continuous availability of visual feedback supports performance when closed-loop control is possible, but impairs performance when visual input is no longer available. Different approaches to explain these performance differences due to the type of visual feedback during practice are considered. For example, these differences could reflect a process of re-optimization of motor planning in a novel environment or represent effects of the specificity of practice. Furthermore, differences in the allocation of attention during movements with terminal and continuous visual feedback could account for the observed differences.

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