Auto Control System Research Articles

The Simulation Study for Auto Electrical Seat Controller Based on Fuzzy Control Technology

Designed the control system policy for automobile electric seat using fuzzy control technology, therefore established its control model by Fuzzy Logic Toolbox, and carried on the off-line simulation to choose controller's optimum control parameters. From the dynamic viewpoint, the auto electric seat adjustment system is not only a complex nonlinear function which includes the location of the DC servo motor and the speed, but also contains serious nonlinear coupling interference, so the system is a highly nonlinear strong coupling, variable multivariable system. Application of traditional control methods (such as traditional PID) is difficult to meet its order requirements, so the research is highly robust method of intelligent control is an effective way to solve the problem. Fuzzy control technology has become the field in which drawn greater attention and researched in recent years. It doesn’t depend on the mathematical model of controlled object, has a good robustness, and nonlinear control characteristics, so it is an effective means to control the object with time-varying, non- linear parameters. In this paper, fuzzy control technology to achieve the orders of auto electric seat adjustment control system functions in the Literature [1], and the tracking of the system was simulated.

Research on Auto Control System for Ship Loader Based on AC800M

Ship loader is one of the most key equipments for bulk material handing in bulk port. This paper regards the ship loader as the study object, introduces an auto detection technology of cabin position and material distribution, and advances a new control measure for automation loading. The field-bus technology of Profibus, AC800M series PLC, inverter, encoder was adopted to build automatic control system. In the mean time, the control code and the ship loader Management System, which is written in Control Builder for AC800M and Visual Basic independently, are used to actual ship loading process without people.

Study on AGC Control System of 300 Reversible Cold Strip Mill

In allusion to 300 Reversible cold mill, the composing and the theory of the auto gauge control system is presented. To meet the characteristic of the 300 reversible cold mill, the PID algorithm With Variable Integral Action is used in position and pressure inner loop control of press down hydraulic cylinder to elevate the response characteristic, and the dynamic press compensating algorithm is used in the gauge control outer loop to elevate the precision of strip thickness, and the stability of rolling process. Fig.1. 300 cold roling mill1 Introduction

The Optimization of Braking Force Distribution Control Strategy for ESP System

To adjust the car yawing moment through specific wheels braking is a kind of widely used method by various auto stability control system. The braking of different wheels will have different effects on direction and the size of the car yawing moment. Based on the established simulink simulation model platform of automobile Electronic Stability Program (ESP) control system, this paper makes a research and analysis on the vehicle stability in five kinds of typical working conditions under three kinds of braking force distribution control strategies. Finally, we propose an optimized braking force distribution control strategy which is determined by the road condition.

연약지반 개량을 위한 PBD 시공품질 자동측정시스템 개발

간척지나 해안지역과 같은 연약지반에 건축 및 토목공사를 위해서는 지반의 강도를 높이기 위한 연약지반개량공사가 필수적이다. 연약지반 개량 공법은 여러 가지가 있으나 우리나라를 비롯해 세계적으로 연직배수공법을 주로 사용하고 있다. 연직배수공법은 연약한 점성토 지반 내에 인공적으로 연직 배수재를 다수 설치하여 배수거리를 단축시킴으로써 압밀을 촉진시키고, 그에 따른 강도증가 효과를 얻을 수 있는 공법이다. 연직배수재로는 경제성과 시공성이 우수한 PBD가 널리 사용되고 있다. PBD 시공품질은 시공 깊이, 압력, 수직도 등에 영향을 받게 된다. 본 논문에서는 PBD 시공시 배수재의 시공 심도, 압력, 수직도를 자동측정하여 작업자가 실시간으로 모니터링 할 수 있고 시공결과를 자동 저장하는 시스템을 개발하였다. 개발된 시스템은 시공 불량 요인이 발생시 자동 경고하여 불량률을 줄일 수 있고, 장비의 이상 발생시 자동 제어시스템을 가동하여 작업의 안전성을 확보하도록 하였다. 【Soft ground improvement is essential to enhance strength of ground for construction in reclaimed land or shore. There are many method of soft ground improvement, and vertical drain method was widely used in many countries including korea. As vertical drain method is to plant many Prefabricated Vertical Drains in soft ground, it promotes consolidation and enhances strength. The PBD(Plastci Board Drain) that is excellent economy and workability was widely used in many countries as Prefabricated Vertical Drains. Construction quality of PBD is affected installation depth, pressure, perpendicularity. This paper describes the system developed that can automatically measure installation depth, pressure and perpendicularity for PBD. This system can reduce fraction defective of construction by auto faulty alarm and keeps the safety of operator by auto control system.】

Methodology of percutaneous bi-polar radiofrequency ablation of thyroid adenomas under ultrasound guidance and monitoring

Objective To establish a treatment proposal of thyroid adenoma by using percutaneous radiofrequency ablation(RFA) and investigate its techniques and skills, means and steps, and safety and efficacy. Methods Contrast-enhanced ultrasound-guided percutaneous RFA of thyroid adenomas were conducted on 202 patients by using an auto-controlled bi-polar electrode system. The indications of thyroid RFA,the optimal puncture route,the ways of anesthesia administration, protection of vital neck vessels and recurrent laryngeal nerve(RLN) and reduction of bleeding from core biopsy, indicators of ending ablation procedure following a complete ablation were investigated and analyzed. Resalts An adenoma smaller than 20 mm in maximal diameter was the optimal candidate for RFA. Either of two puncture routes could be selected upon the target lesion's location. Areas surrounding to the thyroid capsule needed adequate local anesthesia to kill pain. Liquid-isolating maneuver could effectively protect carotid artery and RLN from core needle cutting and electrode heating injury. Advanced block of supplying arteries with heating markedly reduced bleeding involved in the biopsy. Multipoint and multicenter ablation was essential to a complete coagulation. Filling-defect in the ablated adenoma on CEUS was the key sign to terminate ablation procedure. Conclusions Percutaneous bi-polar RFA was proved feasible, effective, safe and supermicroinvasive for treating thyroid adenoma under the way stated here of puncture and technical points and use of CEUS for monitoring. Key words: Ultrasonography; Microbubbles; Thyroid neoplasms; Catheter ablation

AMBAC [Active Mass Balance Auto Control (System)] -手足の運動を利用した方向制御機能-

AMBAC [Active Mass Balance Auto Control (System)] -手足の運動を利用した方向制御機能-

Closed loop auto control system software for Miniature Neutron Source Reactors (MNSRs)

Abstract A closed loop auto control system has been developed and implemented at the Pakistan Research Reactor-2 (PARR-2). For interfacing of the site signals with a computer, a data acquisition card was employed. The system utilizes nine signals and, on their basis, carries out continuous on-line analysis, maintaining safe operation. On-line reactivity measurement is included in this software. Also, it generates control signals for keeping the reactor at the desired power level in auto-mode round-the-clock without human intervention. In case of abnormal conditions for either power or temperature or radiation level, alarms are initiated and if their levels reach beyond prescribed safe operation regime, automatic shutdown sequence is initiated. The control system has been thoroughly tested for various postulated scenarios. The test results have been in good agreement with the expected response.

PHASE MEASURED AND CONTROLLED TECHNOLOGY BASED ON ITS BASIC AND HARMONIC LASER BEAM IN COHERENT CONTROL

In ultrafast optical coherent control,the existence of the phase distortion and phase inconsistence on fundamental frequency and its second harmonic generation laser wavefront leads to fail to achieve the desired experiment results in most cases.An experimental method in diagnosing such distortion situation was designed to make an effective auto-control system applied sucessfully in the coherent control photocurrent experiments.The retrieval algorithm was used,and the spatial surface structure was calculated based on the relationship between the beam intensity and phase difference,thus the voltage or direction was achieved.In this way,the mobile-mirror moves to less aberration.The mentioned experimental result proves that the system can adjust the two wavefronts being parallel automatically in real time.

실규모의 고도처리공정에서 NADH변화 유형과 이를 활용한 공정제어

In this study, we investigated the possibility of auto control and the proper operating factors in the BNR(Biological Nutrient Removal) process using an NADH(Reduced Nicotinamide Adenine Dinucleotide) fluorometer, which characterized the emitted fluorescence when activated by flashes of UV light at 460 nm. In terms of finding adequate operating parameters, results indicted that nitrification efficiency decreased in the controlled DO while denitrification efficiency decreased in the controlled pH. The above results indicated that controlled operating condition after combination with NADH, DO and pH was resonable. Result obtained from the correlation between NADH and pH showed that variation trend of influent loading was similar to those of NADH and pH, and also the variation cycle was repeated on a daily basis. Consequently, this result showed the increase of BOD loading caused the nitrification efficiency to decrease because air-flow, required for nitrification, was reduced, and so the NADH value was increased. From these results, it is possible to use NADH flourimetry to assess the variation of organic load and nitrification efficiency in the case of small change in influent pH such as in sewage and also to handle and operate the load variation in the auto control system using the NADH fluorometer.

Research and application of multifunctional hydroponics installations and nutrient solution auto control system

Research and application of multifunctional hydroponics installations and nutrient solution auto control system

The Application of PLC in the Auto-control System of Chemical Makeup Water Treatment of Boiler

With the deepening of China modernization course, the application of Programmable Logic Controller (PLC) is used more and more abroad in China. This article adopted the Quantum PLC and iFix industrial configuration software to study the application of PLC in the auto-control system of chemical makeup water treatment of boiler.

D-14 CO_2排出量削減のための空調機器の自動制御システム開発に関する研究 : (第6報)実験室系空調の温度湿度コントローラの開発

D-14 CO_2排出量削減のための空調機器の自動制御システム開発に関する研究 : (第6報)実験室系空調の温度湿度コントローラの開発

A Model Reference Self-Organizing Fuzzy Logic Controller for Auto Depth Control System of a Submersible Vehicle

The self-organizing fuzzy logic controller(SOC) may often improperly modify the control rules when either the set-point or the disturbance changes. The problem leads the closed-loop system associated with SOC to the poor settling time and occasional large overshoot response. In order to overcome this problem, a model reference self-organizing fuzzy logic controller(MRSOC) is proposed in this paper. The usefulness of this controller is presented by the simulation results for auto depth control system of a submersible vehicle.

Applications of automatic control systems for chlorination and dechlorination processes in wastewater treatment plants

Due to recent requirements by the U.S.E.P.A. towards the standards on chlorine residuals for chlorination and dechlorination processes, together with the commitment to optimize the process operating conditions for chemical cost savings and to let the plant operator have more time working on other important projects, the City of Houston has been utilizing automatic control systems (Programmable Logic Controllers) at over twenty WWTPs to meet the above tasks. This paper will present one of the City's WWTPs which implemented the auto-control system. It also discusses how to solve the problems of noises in instrumentation signals and dead time which are common in auto-control systems. Finally, it will show how much success the system has complied with the U.S.E.P.A.'s requirements and effectively reduced the chemical costs.

Longitudinal evaluation of aerobic capacity determined by torque auto-controlled system with the feedback of photoelectric pulse

We have previously developed a unique and simple procedure for assessing cardiorespiratory fitness. The present investigation was conducted to evaluate whether an aerobic index determined by torque auto-controlled system with the feedback of photoelectric pulse could sufficiently approximate the cardiorespiratory fitness represented by anaerobic threshold (AT) and maximal oxygen uptake (VO2max). Analysis of the cross-sectional data indicated that the aerobic score (AS: K (WR/Wt)/HR; where WR = mean work rate during 12-min cycling, Wt = weight, and HR = mean heart rate during 12-min cycling) determined by the torque auto-controlled system was significantly correlated with directly measured VO2/AT (r = 0.922, 76 males; r = 0.814, 34 females). Cross-validity of the predicted VO2max from the AS was significant and sufficiently high (r = 0.949, 31 males) for use in the general public. In addition, the effects of cycling or jogging training on the AS were longitudinally investigated on 17 females and 1 male. Major effects of the training were significant improvements in the AS, VO2max, and VO2/AT. Delta percentage change [(post-value - pre-value)/pre-value; delta %] in the AS was closely associated (r = 0.718, 8 females) with delta % in VO2/AT. It appears likely from the present investigation that information obtained through the use of our unique system (i.e., the AS) could provide considerably reliable estimate of cardiorespiratory fitness in both males and females.

消化管内腔圧自動調節装置を内臓したレーザー光発振機器の開発

消化管内腔圧自動調節装置を内臓したレーザー光発振機器の開発

Microprocessor control of a field-emission scanning electron microscope (Model S-800)

We have developed an ultra high resolution scanning electron mícroscope utílízíng a fíeld emíssíon electron source (Fig.1). This instrument has a guaranteed resolution of 2 nm in the secondary electron image mode and it has incorporated a microprocessor control for optimized operating conditions and maximum ease of operation by various automated functions. The microprocessor control system includes field emission electron gun control, electron optical system control, and video signal control. The field emission electron gun control system includes flashing operation which is used to clean the tip surface by heating for a very short time, high voltage operation of accelerating voltage (V0) and tip voltage (V1), correction of emission current which changes with time, and correction of virtual source position which changes with a voltage ratio V0/V1. We have automated these series of operations by developing an auto FE gun control system. Fig. 2 shows details of this system.

Stability Augmentation in Aircraft Design

A general review of the state-of-the-art in relation to stability augmentation in aircraft design, with an attempt to produce a co-ordinated view on the philosophy of its application, is something that I have long felt I should like to see done—but not by myself. My initial reaction on being asked to present such a paper was that this would better come from those concerned with the development of auto-control systems, but on second thoughts, there appeared to be some merit in considering the situation from the point of view of one concerned with the more basic aspects of aircraft handling and operation, putting the emphasis, therefore, on what is required or desirable in these respects, rather than on how it might be achieved. This, then, is my first aim; to consider various possible areas of application of stability augmentation, and advanced control techniques, to aircraft design; my survey will not attempt to be comprehensive but rather, selectively illustrative; it will, however, extend out beyond the confines of pure aircraft design, to externally guided aircraft flight, and in particular automatic landing.

High-Reliability Servos: First Paper: Development of Redundancy Techniques for the Achievement of Highly Reliable Autocontrol for Nuclear Reactors

Plant autocontrol systems are subject to failure; those occurring in autocontrolled nuclear reactors may necessitate a trip, with attendant economic penalties. Such failures may be avoided by designing autocontrollers which comprise a number of identical subsystems. The practical significance is discussed of some of the requirements for achieving high autocontrol reliability, and it is shown how these requirements have been translated into detailed design of hardware for a research reactor in which autocontrol of neutron flux and period is required. The underlying theme is that autocontrol of the plant can continue in spite of subsystem failure, but that careful vigilance must be exercised over the duration of the failure. Various devices are discussed which help to increase the efficiency of a redundant autocontrol system. Daily proof tests and passive monitoring devices can ensure that no relaxation of vigilance is allowed.