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To improve the performance of the glutamic acid fermentation process, a multivariable adaptive inverse control method is proposed considering nonlinear and multivariable coupling of the fermentation process. According to the characteristics of the fermentation process, the kinetics model and the simplified model are given and the reversibility of the model is analyzed. An adaptive inverse control...
This paper proposes a design method of the proportional integral derivative controller. The controller is used to a delay-time system. A polynomial approximation method is studied to the delay-time system. The controller is designed based on the approximation model and used to the delay-time system. Some numerical examples are illustrated to show the effective of the proposed method.
Czochralski (CZ) method based silicon crystal furnace is the main equipment to produce the solar cells silicon material. To meet the technological requirements of the silicon material for the solar photovoltaic industry, this paper introduces the role of mono-crystal silicon in the solar photovoltaic industry, and studies some key control issues in the silicon crystal growth process. Important achievements...
Nonlinear, time-varying and uncertainty matter is an important issue in order to improve conventional PID control technology due to the rapid development of control technologies for a wide range of industries. Artificial neural PID controller such as the single neural PID controlling is a current interesting research topic because of its potential ability of auto-tuning by simulating the human brain...
Launch control is a complex issue which requires keeping the engine running, making the launch process of the vehicle smooth and fast. According to the diversity and the uncertainty of launch conditions and the complex control requirements, an active disturbance rejection controller (ADRC) is designed by the speed tracking control. Moreover, a model of the clutch system is given based on the dynamics...
In the process of pursuing the target, we not only expect the least miss distance, but also a better attitude when the missiles impact the target. The better attitude can effect the power of missiles, and what's more, it can avoid the unnecessary disturbance. For instance, a missile always fails to lock the target owing to the too complicated background while attacking a low-attitude target. The strong...
In semiconductor manufacturing, it is important to produce multiple products on the same equipment to enhance the overall equipment effectiveness so as to improve the productivity. However, the “high-mix” production is difficult to control due to the time-varying model. To address this problem, an adaptive exponentially weighted moving average (EWMA) control method of which the core content is online...
The boiling process is a multivariable nonlinear system with strong interactions and input constraints. In this paper, a multivariable PID control with feed-forward compensation is designed for a benchmark boiler control problem, where the boiler model is proposed in an IFAC Conference and can be used as a benchmark for various control methods. The proposed PID controller is obtained as a result of...
A drum boiler is a multivariable nonlinear system with strong interactions and input constraints. In this paper, a robust control method with feed-forward compensation is applied to design a multivariable PID controller for a benchmark boiler control problem, where the boiler model is proposed in an IFAC Conference and can be used as a benchmark for various control methods. H∞ loop-shaping approach...
For the 2-order auto-regressive process with unknown parameters, further analysis of the effect of the estimation of parameters to the performance of control charts are provided. The influence of the process parameter to the performance of control charts is obvious and the time series process needs to be estimated, so the impact of parameters' valuation is necessary to be analyzed. Some conclusions...
Most industrial processes have multiple time delays and due to the existence of these time delays and couplings within these systems, the control performances are usually not satisfied. In this paper, a modified internal model controller (MIMC) design procedure is employed to deal with this obstacle based on a model discretization and simplification method, together with a decoupling controller. First,...
The development of city gas has become an important symbol of urban modernization, but the resulting problem of gas safety using is becoming more and more serious, especially the outdoor pipeline network leakage, matter has become the priority of development of gas undertakings. This article firstly gets the investigation of Beijing gas pipeline leakage forms and causes. Secondly for gas pipeline...
The activated sludge process is an important treatment method of civil wastewater. Controlling of the activated sludge process is one of the most important and challenging tasks because of its strong nonlinearities and large uncertain dynamics. In this paper we present a nonlinear adaptive control approach to solve the dissolved oxygen concentration control problem for an uncertain wastewater treatment...
Since the changes of raw material properties, external environment and other conditions, during practical industrial processes, multiple stable operation modes may arise, and between any two stable modes may undergo slowly changing transition modes. The existing multimode process monitoring methods haven't monitored dynamic characteristics of the transition modes efficiently. This paper adopts differential...
The traditional principal component analysis (PCA) method divides the variable space into two parts: Principal subspace and Residual subspace by orthogonal decomposition. It has been widely used in fault detection process, but it is difficult to interpret the modes of the fault because of model compound effect, and the ability to distinguish the pattern which is no significant is affected. In industrial...
Quantitative feedback theory (QFT) is a robust control design method. QFT quantitatively mirror the system uncertainty and design performance target to the Nichols chart, so the designed control system could ensure the performance. Due to the parameter uncertainty in tiltrotor conversion process, using QFT method design the flight control system for tiltrotor conversion. Simulation shows that the...
In order to achieve the signal acquisition and control requirements of engine system, this paper designs a kind of high-speed multi-channel data acquisition card, which is built with Altera Cyclone series FPGA EP1C12Q240C8N as the main control chip, using VHDL to realize the real-time acquisition and output control for high-speed multi-channel analog and switch quantity, then the card communicate...
This paper studies the Linear Parameter Varying (LPV) Takagi-Sugeno (T-S) fuzzy gain scheduling control of Wind Turbine Generation System (WTGS) below rated wind speed. The T-S fuzzy linearization approach is used to deal with the Affine Nonlinear Parameter Varying (ANPV) model of WTGS and the LPV T-S fuzzy model with required accuracy is obtained. Considering the maximum utilization of wind energy...
This thesis, subject to the obstacles exist throughout the process of tuning and optimization of the prevailing DC Double close-loop PID controller parameters, explains to realize the tuning and the optimization of PID controller parameters by introducing the Artificial Bee Colony Algorithm on the basis of Nectar Collecting Behavior to the DC Double close-loop tuning system. The comparison and the...
The fuel system is one of the most important component parts of aircraft and plays a vital role for the smooth implementation of the safety of aircraft mission. The platform uses computer software and hardware simulation technology (Making combination of software and hardware simulation which not only covers troubleshooting content requirements but also avoids assembling Air Material).The working...
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