Design of Process Controller Based on PCI Interface and CPLD Technology

2012 ◽  
Vol 614-615 ◽  
pp. 1562-1565
Author(s):  
Yu Sen Li ◽  
Ying Sun
Keyword(s):  
Real Time ◽  
High Speed ◽  
Low Cost ◽  
Pulse Signal ◽  
Pci Bus ◽  
Signal Acquisition ◽  
Real Time Control ◽  
Time Control ◽  
Interface Chip ◽  
Design Ideas

In order to realize the sensor signal acquisition and analysis of data, according to data acquisition system design ideas of the PCI bus, applying to CPLD complex programmable controller and CH365 interface chip and combined with the actual needs of data collection ,designed a kind of low cost, high speed process controller. CPLD realizes data cache control and the control of reading. This design can gather 16 roads analog signals and real-time pulse signal of 8 roads on the same time, which includes a 16-bit digital output channel and a 32-bit counter, could be used in the real-time control.

Intraoperative cervical epidurography: a simple modality for assessing the adequacy of decompression during anterior cervical procedures

2003 ◽  
Vol 98 (1) ◽  
pp. 96-99 ◽  
Author(s):  
Nedal Hejazi ◽  
Alfred Witzmann ◽  
Werner Hassler
Keyword(s):  
Real Time ◽  
High Speed ◽  
Low Cost ◽  
Cord Compression ◽  
Real Time Control ◽  
Immediate Feedback ◽  
Content Type ◽  
Bone Removal ◽  
Time Control ◽  
Fine Print

Object. Intraoperative cervical epidurography (ICE) was used during anterior cervical procedures to assess the success of bone resection and indicate the need for immediate correction in the event of inadequate decompression. Methods. The adequacy of decompression was assessed by the operating neurosurgeon who performed ICE after anterior microdiscectomy with exposure of the dura mater. If the decompression was deemed inadequate, additional bone was removed using a high-speed drill. Epidurography was conducted after each subsequent decompression until adequate bone removal was achieved. This was undertaken in 39 patients undergoing anterior cervical procedures. Nine patients underwent corpectomy, 21 one-level, and nine two-level discectomy. The ICE revealed insufficient resections requiring additional bone removal in 14 (36%) of the 39 patients. Conclusions. The goal of ICE is to ensure adequate decompression, and if such has not been achieved, to allow for additional immediate bone excision. Furthermore, ICE provides additional real-time control of the position of cages and screws to avoid dural tear or spinal cord compression. Because of this immediate feedback, the success rate of anterior cervical procedures can be improved. The advantages of this modality include real-time assessment, low cost, simplicity, and speed.

A real-time control method-based simulation for high-speed trains on large-scale rail network

2017 ◽  
Vol 28 (10) ◽  
pp. 1750126 ◽  
Author(s):  
Yutong Liu ◽  
Chengxuan Cao ◽  
Yaling Zhou ◽  
Ziyan Feng
Keyword(s):  
Real Time ◽  
Traffic Flow ◽  
High Speed ◽  
Large Scale ◽  
Simulation Method ◽  
Real Time Control ◽  
Rail Network ◽  
Time Control ◽  
High Speed Trains ◽  
Rail Traffic

In this paper, an improved real-time control model based on the discrete-time method is constructed to control and simulate the movement of high-speed trains on large-scale rail network. The constraints of acceleration and deceleration are introduced in this model, and a more reasonable definition of the minimal headway is also presented. Considering the complicated rail traffic environment in practice, we propose a set of sound operational strategies to excellently control traffic flow on rail network under various conditions. Several simulation experiments with different parameter combinations are conducted to verify the effectiveness of the control simulation method. The experimental results are similar to realistic environment and some characteristics of rail traffic flow are also investigated, especially the impact of stochastic disturbances and the minimal headway on the rail traffic flow on large-scale rail network, which can better assist dispatchers in analysis and decision-making. Meanwhile, experimental results also demonstrate that the proposed control simulation method can be in real-time control of traffic flow for high-speed trains not only on the simple rail line, but also on the complicated large-scale network such as China’s high-speed rail network and serve as a tool of simulating the traffic flow on large-scale rail network to study the characteristics of rail traffic flow.

A Low Cost Fault-Tolerant Multiprocessor System for Real-Time Control

1986 ◽  
Vol 19 (13) ◽  
pp. 113-117
Author(s):  
J.J. Serrano ◽  
C. Cebrián ◽  
J. Vila ◽  
R. Ors
Keyword(s):  
Real Time ◽  
Fault Tolerant ◽  
Low Cost ◽  
Multiprocessor System ◽  
Real Time Control ◽  
Time Control

Translation + Pendaphonics = Movement Modulated Media

Leonardo ◽  
2012 ◽  
Vol 45 (4) ◽  
pp. 322-329 ◽  
Author(s):  
Byron Lahey ◽  
Winslow Burleson ◽  
Elizabeth Streb
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Low Cost ◽  
Vertical Wall ◽  
State University ◽  
Arizona State University ◽  
Motion Sensing ◽  
Real Time Control ◽  
Projected Image ◽  
Time Control

Translation is a multimedia dance performed on a vertical wall filled with the projected image of a lunar surface. Pendaphonics is a low-cost, versatile, and robust motion-sensing hardware-software system integrated with the rigging of Translation to detect the dancers' motion and provide real-time control of the virtual moonscape. Replacing remotely triggered manual cues with high-resolution, real-time control by the performers expands the expressive range and ensures synchronization of feedback with the performers' movements. This project is the first application of an ongoing collaboration between the Motivational Environments Research Group at Arizona State University (ASU) and STREB Extreme Action Company.

Evaluation of a Low-Cost Microcontroller for Real-Time Control Education and Prototyping

2014 ◽  
Author(s):  
Ryan W. Krauss
Keyword(s):  
Feedback Control ◽  
Real Time ◽  
Closed Loop ◽  
Low Cost ◽  
Serial Communication ◽  
Real Time Control ◽  
Time Control ◽  
Active User ◽  
Bode Plots ◽  
Control Education

Arduino microcontrollers are popular, low-cost, easy-to-program, and have an active user community. This paper seeks to quantitatively assess whether or not Arduinos are a good fit for real-time feedback control experiments and controls education. Bode plots and serial echo tests are used to assess the use of Arduinos in two scenarios: a prototyping mode that involves bidirectional real-time serial communication with a PC and a hybrid mode that streams data in real-time over serial. The closed-loop performance with the Arduino is comparable to that of another more complicated and more expensive microcontroller for the plant considered. Some practical tips on using an Arduino for real-time feedback control are also given.

scholarly journals Application of the Novint Falcon haptic device as an actuator in real-time control

2013 ◽  
Vol 4 (3) ◽  
Author(s):  
Daniel J. Block ◽  
Mark B. Michelotti ◽  
Ramavarapu S. Sreenivas
Keyword(s):  
Embedded System ◽  
High Speed ◽  
Force Feedback ◽  
Low Cost ◽  
Small Scale ◽  
Input Device ◽  
Real Time Control ◽  
Modeling And Control ◽  
Time Control ◽  
Viable Solution

AbstractThis paper describes the development of an embedded system whose purpose is to control the Novint Falcon as a robot, and to develop a control experiment that demonstrates the use the Novint Falcon as a robotic actuator. The Novint Falcon, which is a PC input device, is “haptic” in the sense that it has a force feedback component. Its relatively low cost compared with other platforms makes it a good candidate for academic application in robot modeling and control. An embedded system is developed to interface with the multiple motors and sensors present in the Novint Falcon, which is subsequently used to control three independent Novint Falcons for a “ballon- plate” experiment. The results show that the device is a viable solution for high-speed actuation of small-scale mechanical systems.

Promote the Ethernet Performance Based on Inline Assemble

2014 ◽  
Vol 926-930 ◽  
pp. 2690-2693
Author(s):  
Yao Cheng
Keyword(s):  
Control System ◽  
Real Time ◽  
Performance Improvement ◽  
Low Cost ◽  
Engineering Application ◽  
Real Time Control ◽  
Time Control ◽  
The Right ◽  
Ethernet Interface ◽  
Modern Industry

Ethernet has been broadly used in modern industry for its exoteric standard, flexibility and low cost. Ethernet is becoming the right choice for many engineering application. However, issues of performance must be considered when we apply it to timing sensitive field such as real time control system and so on. An Ethernet interface solution implemented based on s3c2410a and ax88796 was described in this article, and in order to improve the performance, inline assemble was introduced into this study. The effect of performance improvement through inline assemble was checked by ping experiments. It was proved that inline assemble can improve the performance of Ethernet interface distinctly.

PCCHUA — A LABORATORY SETUP FOR REAL-TIME CONTROL AND SYNCHRONIZATION OF CHAOTIC OSCILLATIONS

2005 ◽  
Vol 15 (08) ◽  
pp. 2349-2360 ◽  
Author(s):  
LEONARDO A. B. TÔRRES ◽  
LUIS ANTONIO AGUIRRE
Keyword(s):  
Real Time ◽  
Low Cost ◽  
Real Time Control ◽  
Time Restrictions ◽  
Laboratory Setup ◽  
Time Control ◽  
Variable Control ◽  
Control Schemes ◽  
Control And Synchronization ◽  
Chua Oscillator

This paper describes a laboratory setup suitable for implementing low cost real-time solutions in the fields of control, synchronization and information transmission based on chaotic oscillators. The setup has the following features: (a) it is composed of a Chua oscillator furnished with three actuators thus permitting mono- and multi-variable control; (b) the actuators can be driven by the analog outputs of a standard I/O-board; in order to be able to actuate fast enough (c) the I/O-board is driven by a real time program written for Linux and (d) an inductorless implementation of Chua's circuit permits to slow down the original dynamics to just a few hertz. This enables implementing sophisticated control schemes without severe time restrictions. The paper concludes with a sample of experiments performed using the new setup.

scholarly journals Network-Oriented Real-Time Embedded System Considering Synchronous Joint Space Motion for an Omnidirectional Mobile Robot

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 317 ◽  
Author(s):  
Raimarius Delgado ◽  
Byoung Choi
Keyword(s):  
Mobile Robot ◽  
Embedded System ◽  
Real Time ◽  
Low Cost ◽  
Joint Space ◽  
Geometric Constraints ◽  
Real Time Control ◽  
Synchronization Mechanism ◽  
Omnidirectional Mobile Robot ◽  
Time Control

This paper proposes a real-time embedded system for joint space control of omnidirectional mobile robots. Actuators driving an omnidirectional mobile robot are connected in a line topology which requires synchronization to move simultaneously in translation and rotation. We employ EtherCAT, a real-time Ethernet network, to control servo controllers for the mobile robot. The first part of this study focuses on the design of a low-cost embedded system utilizing an open-source EtherCAT master. Although satisfying real-time constraints is critical, a desired trajectory on the center of the mobile robot should be decomposed into the joint space to drive the servo controllers. For the center of the robot, a convolution-based path planner and a corresponding joint space control algorithm are presented considering its physical limits. To avoid obstacles that introduce geometric constraints on the curved path, a trajectory generation algorithm considering high curvature turning points is adapted for an omnidirectional mobile robot. Tracking a high curvature path increases mathematical complexity, which requires precise synchronization between the actuators of the mobile robot. An improvement of the distributed clock—the synchronization mechanism of EtherCAT for slaves—is presented and applied to the joint controllers of the mobile robot. The local time of the EtherCAT master is dynamically adjusted according to the drift of the reference slave, which minimizes the synchronization error between each joint. Experiments are conducted on our own developed four-wheeled omnidirectional mobile robot. The experiment results confirm that the proposed system is very effective in real-time control applications for precise motion control of the robot even for tracking high curvature paths.

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