Precision Control System of Chemical Reactor of Continuous Operation

2019 ◽  
Vol 51 (4) ◽  
pp. 66-76
Author(s):  
Mikhail A. Stopakevich ◽  
Elena O. Ulitskaya
Keyword(s):  
Control System ◽  
Chemical Reactor ◽  
Continuous Operation ◽  
Precision Control

Experimental Demonstration of Precision Control of a Deployable Optics Structure

2002 ◽  
Vol 124 (3) ◽  
pp. 441-450 ◽  
Author(s):  
R. Scott Erwin ◽  
Karl Schrader ◽  
Ruth L. Moser ◽  
Steven F. Griffin
Keyword(s):  
Control System ◽  
Structural Control ◽  
Level Control ◽  
Precision Control ◽  
Research Issues ◽  
Optical Surfaces ◽  
Point Tracking ◽  
High Bandwidth ◽  
And Performance ◽  
System 1

This paper presents the development, design, and implementation of a precision control system for a large, sparse-aperture space-deployable telescope testbed. Aspects of the testbed and laboratory environment relevant to nanometer-level control and performance objectives are provided. There are four main objectives of the control system: 1) reduction of natural resonances of the supporting structure, 2) rejection of tonal disturbances, 3) tip, tilt, and piston set-point tracking for optical surfaces, and 4) reduction in settling time of optical surfaces after an impulsive slew-type disturbance. The development of a three-input, three-output, high-bandwidth structural control system for the testbed is presented, and experimental data demonstrating that all objectives were attained is provided. The paper concludes with a discussion of the results and a description of research issues remaining to be addressed.

A Spool Displacement Control System of Proportional Valve Based on Digital Observer

2010 ◽  
Vol 455 ◽  
pp. 110-115 ◽  
Author(s):  
Xiang Bing Kong ◽  
H.Y. Wang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Kinetic Energy ◽  
Feedback Control System ◽  
Displacement Control ◽  
Precision Control ◽  
Proportional Valve ◽  
Small Flow ◽  
The Mathematical Model ◽  
Control Accuracy

To solve the problems that general proportional valve can’t meet the requirements of high precision control, the paper describes the generation mechanism of kinetic energy in the accurate spool displacement control system of the small flow rate proportional valve. The mechanism of kinetic energy and displacement control of spool under disturbance are discussed quantitatively. Based on DSP and the mathematical model established, the digital state observer feedback control system is designed. The experiment shows that the system can restrain disturbance effectively, and the control accuracy of spool displacement is high, which is up to the level of 5μm.

Control System Improvement of an Industrial Chemical Reactor

1995 ◽  
Vol 28 (9) ◽  
pp. 9-14
Author(s):  
Satoru Murakami ◽  
Tohru Yoshinari ◽  
Takeshi Fujiwara ◽  
Hirokazu Nishitani
Keyword(s):  
Control System ◽  
Chemical Reactor ◽  
Industrial Chemical ◽  
System Improvement

Precision Control Research on DACS-Based Modern Digital Shipbuilding Technology

2010 ◽  
Vol 142 ◽  
pp. 72-76
Author(s):  
G.X. Liu
Keyword(s):  
Control System ◽  
Digital Control ◽  
Control Technology ◽  
Precision Control ◽  
Shipbuilding Industry ◽  
Control Equipment ◽  
Control Research ◽  
Long Time

At present the developed shipbuilding in Japan and Korea, has entered the era of precision control shipbuilding, our country's shipbuilding industry is during the transition from the margin shipbuilding to no margin, and try hard to achieve precision shipbuilding, but it needs a very long time. One of way to achieve target is the full use of modern digital precision control equipment and software of shipbuilding. The paper is based on DACS precision control system, and deeply analysis of modern digital control technology shipbuilding is given.

scholarly journals Synthesis and modeling of the multidimensional technological object control system on the state regulator basis

Vestnik IGEU ◽  
2020 ◽  
pp. 57-64
Author(s):  
A.N. Labutin ◽  
Yu.N. Zagarinskaya ◽  
V.Yu. Nevinitsyn ◽  
G.V. Volkova ◽  
V.A. Zaitsev
Keyword(s):  
Computer Simulation ◽  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
State Vector ◽  
Chemical Reactor ◽  
The State ◽  
Static Error ◽  
Integral Component ◽  
State Regulator

The problem of structural-parametric synthesis of automatic control systems (ACS) of technological objects is deter-mined by the multi-dimensionality, multi-connectedness and nonlinearity of their mathematical models. Despite the indicated properties of such objects, traditional linear systems based on PID-algorithms are still used for process control. Since the synthesis of linear systems using input-output models does not take into account the multi-dimensionality and mutual influence of state coordinates, such systems increase the influence of parametric and signal perturbations on the quality of control processes. The increasing requirements for the quality and efficiency of technological processes control made it expedient to apply the control principle by the state vector based on the use of uninertial state regulators or combined state regulators including flexible feedback on the derivative state coordinates or state coordinate integrals. The research uses methods of system analysis of technological processes as control objects, methods of automatic control theory, methods of control systems synthesis on the state regulators basis, meth-ods of computer simulation. The linearized mathematical model of liquid-phase chemical reactor in the state space has been obtained. It has been established that the investigated object has the property of free movement stability and it is fully controlled in the state space. The problem of synthesis of a single-channel concentration vector control system in a chemical reactor using state regulator has been solved. The parameters of state regulator settings have been determined using the method of modal control. The efficiency of the automatic control system on the basis of the state regulator with an integral component has been shown using the method of computer simulation of the ‘nonlinear object – linear control subsystem’ complex. It has been demonstrated that the absence of an integral component in the control algorithm structure leads to a great static error of regulation. To eliminate the static error of control and ensure the robustness of the control system, it is recommended to introduce an integral component into the structure of state controller. This ensures the efficiency of the control system both for the case of complete measurement of the state vector and for the case of measurement of the output controlled variable only.

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