System Characterization and Plasma-Particle Distribution Analysis for Development of a Closed Loop Control for Plasma Spray

2000 ◽  
Author(s):  
M. Gevelber ◽  
D. Wroblewski ◽  
J. Fincke ◽  
W. D. Swank
Keyword(s):  
Plasma Spray ◽  
Spray Deposition ◽  
Distribution Analysis ◽  
Real Time Control ◽  
Critical System ◽  
Loop Control ◽  
Time Control ◽  
System Characterization ◽  
Advanced Control ◽  
And Performance

Abstract This paper investigates the need to develop an advanced control system for plasma spray deposition. The limitations and performance capability of both feed forward and real-time control are evaluated. Critical system characteristics for developing such controllers are experimentally identified including dominant nonlinearalities; dynamics, cross-coupling, distributions, and sensor issues.

Sensor Issues and Requirements for Developing Real-Time Control for Plasma Spray Deposition

2010 ◽  
Vol 19 (4) ◽  
pp. 723-735 ◽  
Author(s):  
D. Wroblewski ◽  
G. Reimann ◽  
M. Tuttle ◽  
D. Radgowski ◽  
M. Cannamela ◽  
...  
Keyword(s):  
Real Time ◽  
Plasma Spray ◽  
Spray Deposition ◽  
Real Time Control ◽  
Time Control

UDP Network Communications for Wireless Control With Loop Coordination

2004 ◽  
Author(s):  
Paul A. Kawka ◽  
Nicholas J. Ploplys ◽  
Andrew G. Alleyne
Keyword(s):  
Closed Loop ◽  
Ad Hoc ◽  
Test Plant ◽  
Real Time Control ◽  
Loop Control ◽  
Communication Framework ◽  
Time Control ◽  
Wireless Control ◽  
Shared Goal ◽  
Communication Scheme

With the advent of Bluetooth and wireless 802.11 Ethernet protocols having transmission speeds up to 54 Mbps, wireless communication for closed-loop control is becoming more and more achievable. Some researchers have utilized Bluetooth networks for wireless control, resulting in successful stabilization of an unstable plant with a network controller. Previously, the authors of this paper developed a novel event-based control with time-based sensing and actuation communication method using 11 Mbps wireless Ethernet with the user datagram protocol (UDP). Near real-time control of an unstable Furuta pendulum with up to 250 Hz closed loop bandwidth was obtained using off the shelf hardware, Matlab, and Windows 2000 operating systems. The present work extends that communication scheme to two independent wireless loops that share a mutual goal, making additional communication between the two controllers advantageous. The communication framework for the coupled control in this ad hoc peer-to-peer network is presented along with some practical limitations. Data from a physical system implementing this framework demonstrates its effectiveness in application. The test plant couples a simple light tracking plant with a Furuta pendulum and a shared goal of maintaining line of sight (LOS) under normal conditions as well as reestablishing LOS in the case of lost contact due to sudden obstacles.

scholarly journals An MPC-Enabled SWMM Implementation of the Astlingen RTC Benchmarking Network

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1034 ◽  
Author(s):  
Congcong Sun ◽  
Jan Lorenz Svensen ◽  
Morten Borup ◽  
Vicenç Puig ◽  
Gabriela Cembrano ◽  
...  
Keyword(s):  
Real Time ◽  
Control Strategies ◽  
Real Time Control ◽  
Time Control ◽  
Advanced Control ◽  
Water Association ◽  
Benchmark System ◽  
Receiving Waters ◽  
Global Strategies ◽  
Swmm Model

The advanced control of urban drainage systems (UDS) has great potential in reducing pollution to the receiving waters by optimizing the operations of UDS infrastructural elements. Existing controls vary in complexity, including local and global strategies, Real-Time Control (RTC) and Model Predictive Control (MPC). Their results are, however, site-specific, hindering a direct comparison of their performance. Therefore, the working group ‘Integral Real-Time Control’ of the German Water Association (DWA) developed the Astlingen benchmark network, which has been implemented in conceptual hydrological models and applied to compare RTC strategies. However, the level of detail of such implementations is insufficient for testing more complex MPC strategies. In order to provide a benchmark for MPC, this paper presents: (1) The implementation of the conceptual Astlingen system in an open-source hydrodynamic model (EPA-SWMM), and (2) the application of an MPC strategy to the developed SWMM model. The MPC strategy was tested against traditional and well-established local and global RTC approaches, demonstrating how the proposed benchmark system can be used to test and compare complex control strategies.

Design and Implementation of a Kind of Intelligent Electric Blanket Temperature Control System

2013 ◽  
Vol 432 ◽  
pp. 447-452
Author(s):  
Rong Li ◽  
Zhe Ming Duan ◽  
Wei Zhou ◽  
Bing Chao Dong
Keyword(s):  
Real Time ◽  
Temperature Control ◽  
Temperature Control System ◽  
Single Chip ◽  
Real Time Control ◽  
Loop Control ◽  
Relay Control ◽  
Time Control ◽  
Control Relay ◽  
Design And Manufacture

Temperature control is the key problem in the design and manufacture of electric blankets. In order to solve current technological failure to real-time control of the temperature of electric blanket, this paper applies technical means of DS18B20 temperature acquisition and relay control temperature heating, together with key circuit, display circuit as well as other auxiliary circuit, and the system achieved electric blanket working temperature real-time intelligent control. Relay output controlled the temperature closed loop control by single-chip microcomputer, and a new type of intelligent temperature control technology of electric blanket is developed, real-time temperature control is enhanced, which improved the security and energy conservation of electric blanket.

Hardware Design of Diesel Generator Sets Digital Control System Based on DSP

2008 ◽  
Vol 44-46 ◽  
pp. 563-568
Author(s):  
Cun Lu Dang ◽  
L. Chai ◽  
Xiao Ying Zhang
Keyword(s):  
Control System ◽  
Digital Control ◽  
High Performance ◽  
Hardware Design ◽  
Digital Control System ◽  
Diesel Generator ◽  
Real Time Control ◽  
Time Control ◽  
And Performance ◽  
Generator Sets

The diesel generator sets digital control system based on DSP is studied in this paper. The principles of voltage and speed control are analyzed. The main DSP chip is 16-bit fixed-point TMS320LF2407A. The hardware design, the former channels, the after channels and the CAN controller are accomplished in this paper. The simulation results indicate the controller has high-performance processing capabilities and it can meet the need of Generator Sets' real-time control and performance requirements.

scholarly journals Some aspects of on-line computer control of a lathe

1979 ◽  
Author(s):  
Δημήτριος Πούλος
Keyword(s):  
Control Function ◽  
Low Cost ◽  
Computer Control ◽  
Spindle Motor ◽  
Electrical Circuit ◽  
Ball Screw ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Circular Interpolation

A small lathe has been modified to work under microprocessor control to enhance the facilites which the lathe offers, and provide a wider operating range with relevant economic gains. As a result of these modifications the saddle motion is controlled by steppingmotors under closed-loop control giving better operating system characteristics as indicated below. An electrical circuit has been developed to monitor spindle torque and the mechanical link between the spindle motor and the screw has been replaced to give an " infinitely variable " gearbox, and this allows a variety of non-standard screws, helices and spirals to be manufactured. Software for the system includes control programs for implementation of the adaptive control function and monitoring of tool wear; linear and circular interpolation is implemented through the manipulation of Boolean functions, rather than by solving equations to optimise the performance of stepping motors when used for real-time control. Use o f low cost uncalibrated ball-screw s in conjunction with a calibration algorithm results in an overall accuracy better than the resolution of the system. It is concluded that it is practical to carry out a low-cost retrofit on existing machine tools to enhance their range of capabilities.

scholarly journals Hardware RTOS: Custom Scheduler Implementation Based on Multiple Pipeline Registers and MIPS32 Architecture

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 211 ◽  
Author(s):  
Ionel Zagan ◽  
Vasile Găitan
Keyword(s):  
Real Time ◽  
Response Speed ◽  
Real Time Control ◽  
Shared Resources ◽  
Time Control ◽  
Systems Software ◽  
Switch Operation ◽  
And Performance ◽  
Dynamic Scheduler ◽  
Time Systems

The task context switch operation, the inter-task synchronization and communication mechanisms, as well as the jitter occurred in treating aperiodic events, are crucial factors in implementing real-time operating systems (RTOS). In practice and literature, several solutions can be identified for improving the response speed and performance of real-time systems. Software implementations of RTOS-specific functions can generate significant delays, adversely affecting the deadlines required for certain applications. This paper presents an original implementation of a dedicated processor, based on multiple pipeline registers, and a hardware support for a dynamic scheduler with the following characteristics: performs unitary event management, provides access to architecture shared resources, prioritizes and executes the multiple events expected by the same task. The paper also presents a method through which interrupts are assigned to tasks. Through dedicated instructions, the integrated hardware scheduler implements tasks synchronization with multiple prioritized events, thus ensuring an efficient functioning of the processor in the context of real-time control.

Research on Airbags Overturning Device due to the PID Closed-Loop Control Technology

2013 ◽  
Vol 313-314 ◽  
pp. 395-398
Author(s):  
De Qiang Zhang ◽  
Li Ying Su ◽  
Duo Xing Zhao
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Pressure Sensors ◽  
Pressure Control ◽  
Closed Loop Control ◽  
Control Technology ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Pressure Control System

Based on S7-200 PLC, pressure sensors and amplifiers, this paper uses PID instruction to establish the closed-loop pressure control system of the required thrust in turning airbags. So in the automatic overturning airbags, it is capable to real-time control the push rods running status.

scholarly journals Real time control of curved laser welding processes by cellular neural networks (CNN): first results

2010 ◽  
Vol 8 ◽  
pp. 117-122 ◽  
Author(s):  
L. Nicolosi ◽  
R. Tetzlaff
Keyword(s):  
Control System ◽  
Laser Welding ◽  
Real Time ◽  
Laser Beam Welding ◽  
Recent Analysis ◽  
Feedback Signal ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Welding Processes

Abstract. In the last decades the laser beam welding (LBW) has outclassed older welding techniques in the industrial scenario. Despite the improvement in welding technology, sophisticated methods of fault detection are not commonly used in commercially available equipments yet. A recent analysis of process images have revealed the possibility to build up a real time closed loop control system. By the use of image based quality features, a feedback signal can be provided to maintain the process in the desired state. The development of the presented visual control system has been focused on the adjustment of the laser power according to the detection of the so called full penetration hole. Due to the high dynamics of the laser welding, a fast real time image processing with controlling rates in the multi kilo Hertz range is necessary to have a robust feedback control. In this paper an algorithm for the real time control of welding processes is described. It has been implemented on the Eye-RIS v1.2, a visual system which mounts a cellular structure. By applying this algorithm in real time applications, controlling rates of about 7 kHz can be reached. In the following some real time control results are also described.

Kinematic analysis and design of a six D.O.F. 3-PRPS in-parallel manipulator

Robotica ◽  
1999 ◽  
Vol 17 (3) ◽  
pp. 269-281 ◽  
Author(s):  
J.H. Shim ◽  
D.S. Kwon ◽  
H.S. Cho
Keyword(s):  
Kinematic Analysis ◽  
Parallel Manipulator ◽  
Kinematic Model ◽  
Real Time Control ◽  
Analysis And Design ◽  
Pure Rotation ◽  
Time Control ◽  
Active Compliance ◽  
Design Characteristics ◽  
And Performance

This paper presents a kinematic analysis and design characteristics of an in-parallel manipulator developed for the probing task application that requires high precision, active compliance, and high control bandwidth. The developed manipulator is a class of six-degree-of-freedom in-parallel platforms with 3 PRPS (prismatic-revolute-prismatic-spherical joints) chain geometry. The main advantages of this manipulator, compared with the typical Stewart platform type, are the capability of pure rotation generation and the easy prediction of the moving platform motion. The purpose of this paper is to develop an efficient kinematic model which can be used for real-time control and to propose systematic methods to design the manipulator considering workspace, manipulability, resistivity, singularity, and the existence conditions of the forward kinematic solution. Particularly, we propose a new method for checking the singularity of the parallel manipulator using the translational and rotational resistivity measures. A series of simulation are carried out to show kinematic characteristics and performance of the manipulator mechanism. A prototype manipulator was built based on the kinematic analysis results.

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