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This paper presents the critical issues and methodologies to improve robotic machining performance with industrial robots. A complete solution using active force control is introduced to address various issues arouse during the robotic machining process. Programming complex contour parts without a CAD model is made easy using force control functions such as lead-through and path-learning. The problem...
A kind of hybrid inference Petri net-based (HIPN) expert coordinated regional control system (ECRCS) is proposed. With HIPN features of visualization modeling, conflict resolving and parallel inferring, ECRCS has effectively enhanced the system-analyzing and decision-making abilities of expert control systems, which are suitable to control the non-linear, time-variation and uncertainty objects especially...
Evaporation process is an important working procedure in alumina production. The production index of the evaporation system is alkaline solution concentration. Alkaline solution concentration can not be measured on-line in practical production for the present. Assay result directs the industrial product which leads to more steam consumption, easy scaling and recycling inefficiency for alkaline solution...
This paper presents a generalization of the internal model control (IMC) approach to feedforward control action generation. As it is well known, one of the distinctive features of the IMC formulation is the possibility to distinguish between the nominal and uncertain situation. However the consideration of the presence of uncertainty for the feedforward part of the controller is not as simple as it...
An adaptive steady predictive functional control algorithm using the orthogonal Kautz function base has been designed in this paper. Performance of the closed-loop system is discussed, and the stability condition is given based on Lyapunov stability theory. A new improved parameter compensating algorithm depended on genetic algorithm is introduced. The simulations verified the given strategy.
A new predictive control algorithm based on single neural network for a kind of MIMO nonlinear systems is presented. In the control process, only one RBF network is used to calculate the multi-step-ahead predictive outputs. To overcome the drawbacks of the traditional cost function, a new multi-step predictive cost function with differential part is constructed. This strategy can accelerate the process...
The intelligent press forming of sheet metal is a completely new and comprehensive technology that combines control-science, computer science, material science and metal forming theory. Although the technology originated in 1980s from America, it had focused on the spring-back of V-shaped bending. The author expanded the the research field to the axis-symmetric part and non-axis symmetric part and...
Aiming at unstable processes with large time delay in chemical industry, a modified internal model control method is proposed based on internal model control (IMC). The structure of new control method consists of inner-loop control and outerloop control. The separately design step is used to design forward-feedback controller for disturbance rejection and the IMC controller for set-point tracking...
The reaction discussed in this paper is a complicated, multi-phase-catalyzed batch reaction to produce phenyl-pyretic acid by double carbonylation of benzyl chloride. In order to industrialize the production process, a significant engineering problem is to study the operation and control of this batch process. The first stage of study in this paper is to process the experimental data, then to build...
The constraints make a process nonlinear even for a linear system in process control. A robust model predictive control (MPC) algorithm for the linear systems with disturbance by explicitly considering the constraints is proposed in this paper. By introducing an auxiliary system to the uncertain MPC system, the robust H2 problem is converted to an LQ problem. Then the constraint can be exploited explicitly...
Coke oven heating temperature was reflected by flue temperature and adjusted by gas flow. Aiming at the coke oven heating process characteristics of great inertia, pure time-delay, strong non-linear and time changeable, the control method of combining the intermittent heating control with the heating gas flow adjustment was adopted. Hybrid intelligent control strategy and model of coke oven heating...
An variable precision rough set (RS) knowledge acquisition based on discrete particle swarm optimization (DPSO-VPRS) are proposed to solve rough set is lack of the ability of anti-jamming, which is used the information entropy is considered as a suitable function in discrete particle swarm algorithm and the attribute dependent degree of variable precision rough set is optimized, and make the classification...
Aiming at the practical plants with strong nonlinear characteristics, a new multi-model internal model control (MIMC) strategy based on Gaussian potential function networks (GPFN) is proposed in this paper. The internal model is represented by GPFN and the corresponding controller can be got directly, which simplifies the control law design and analyses greatly. Meanwhile, the way of model switch...
A new scheme of using generic model control based on input equivalent disturbance (AGMC) to design controller is presented for nonlinear electro-hydraulic servo control systems. It is very easy to tune for the controller whose parameters are of very explicit physic meaning. The influence on control performance of time-varying parameters and unmeasurable disturbances can be effectively compensated...
An optimization method based on the structured model is proposed to solve the feeding strategies problem of fed-batch in the complex fermentation process. Firstly the structured model improved to fit the fed-batch fermentation is proposed to describe the product yield phase. Then the optimization model is built to gain the most product efficiency. Finally the algorithm for solving is carried out by...
Generalized framework for access control (GFAC) is a classical multi-policies supporting mechanism, but its efficiency markedly declines after enforcing several policy modules. Considering the efficiency of GFAC, a novel access control framework based on immunity (IGFAC) is constructed with employing multiple principles and mechanisms of the artificial immune system, such as the immune recognition,...
Based on researching into control technique of hematite flotation process, the mathematic model of control of flotation reagent quantum is introduced. This model uses image processing technique to extract texture characteristics of froth image before using the rough set and LVQ neural net technique to estimate the status of produce and adjust reagent quantum. Application of plant and emulate contrast...
Holonic Manufacturing Systems (HMS) was first proposed as a new manufacturing paradigm in the beginning of 1990 and has since then received a lot of attention in academic and industrial research. In spite of the large number of developments reported in Holonic Control Architectures and Holonic Control Algorithms, there is very little work on methodologies for HMS development. There is a definite need...
Computer integrated manufacturing system based on the three structures of enterprise resource planning system, manufacturing execution system and process control system has become the mainstream frame of process industry CIMS theory and product at home and abroad. The conception of CIMS and meaning of process CIMS is briefly introduced. Given the characteristics of production and operation in cement...
As for the last technicks of plastic injection blow forming block device; hollow blow plastic to mold, the temperature control of mold is one of the key techniques to obtain high quality. This paper analyze the requirement of temperature control and environmental temperature change, and the disturbance elements of mandril high temperature object to the temperature of the forming block. This paper...
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