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A human-like mobile robotic system for humus production, from earthworms (Eisenia foetida), in urban areas, was developed, built up and tested. The system could be separated in two modules for a better understanding, Software and Hardware. The Software implements a fuzzy control algorithm aimed to keep the best environment conditions inside the humus production zone, an in this way maximize the humus...
The paper presents the application of the linearizing control technique for stabilization of the isopropanol concentration in the ultrasonic nebulization process. The isopropanol concentration has to be kept constant to make the nebulization process more efficient. This is achieved by manipulating the inlet flow rate of a fresh isopropanol-water mixture. Because the content of the vessel is not well-mixed,...
The paper presents optimizing control of the electromagnetic grinding system. The electromagnetic grinding is a complex process, thus formulation of the optimization problem is done in a top-down manner. To do so, the parameters which influence product quality and serves as decision variables are specially selected. The selection follows from environmental analysis of the system and discussion of...
Research the method of resource saving based on a systematic direction of use of materials, reagents, energy, reified and operating expenses of personnel work. Researched the variants of automation production for the effective control of complex combined production. Automation of technological system ≪Gas nitriding — recycling processes≫ increases the efficiency of production of strengthened engineering...
In this study, the dynamic responses of three C5 fraction separation processes: conventional, simplified, and intensified processes with control systems are investigated. The simplified process provides higher concentration of DCPD in the product and can be stable in the dynamic state. While an intensified process can substantially reduce energy consumption, it is necessary to fix the liquid split...
A large number of real-world problems nowadays require that decisions be made in the presence of uncertainties. Traditionally, the task of separation systems design neglects the influence of uncertainties. This work, however, explores the optimization strategy of a frequently encountered equilibrium-based distillation system design problem in the face of uncertainties. In particular, uncertainties...
A large number of real-world problems nowadays require that decisions be made in the presence of uncertainties. Traditionally, the task of separation systems design neglects the influence of uncertainties. This work, however, explores the optimization strategy of a frequently encountered equilibrium-based distillation system design problem in the face of uncertainties. In particular, uncertainties...
Conventional reverse vending machines use complex image processing technology to detect the bottles which make it more expensive. In this paper the design of a Smart Bottle Recycle Machine (SBRM) is presented. It is designed on a Field Programmable Gate Array (FPGA) using an ultrasonic range sensor which is readily available at a low cost. The sensor was used to calculate the number of bottles and...
Snowball effect is a positive mass and energy feedback acting on a process. This effect complicates process control by activating variables interactions and nonlinear phenomena inherent to the process. Traditional process control structures are strongly affected by snowball, which means that to reject relatively small perturbations large changes in the manipulated variables are required. In several...
This paper considers near-optimal operation of the Tennessee Eastman (TE) process by using a retrofit self-optimizing control (SOC) approach. Motivated by the factor that most chemical plants in operation have already been equipped with a workable control system for regulatory control, we propose to improve the economic performance by controlling some self-optimizing controlled variables (CVs). Different...
Controlling the reaction and the product quality in a large Polyester Intermediates plant has been an intractable problem for many years. Handling difficulties and the hazardous nature of the process has made it impossible to get real time measures of the product or of the dissolved catalyst. Model Predictive Control was implemented, but failed to give reliable control. Now a simplified Process Model...
A new concept for the control of moving bed Chromatographie processes is developed. In a first step focus is on the true moving bed process. A fairly simple method is developed for the control of this process with standard PI controllers. This method makes direct use of the underlying spatio-temporal pattern formation phenomena — also termed as nonlinear wave propagation (Marquardt [12], Kienle [4])...
An important issue in analyzing a Wastewater Treatment Plant (WWTP) is modelling the disturbances acting on the control loops of the plant, especially in case of urban WWTPs. Although in the literature periodic variations are systematically adopted for the influent description, the control solutions to reject these disturbances are not taken into consideration. This paper aims to establish a WWTP...
This paper deals with the control of processes having recycle streams. These processes can be modeled as state delayed systems. In this work the problem of robust design of an observed-based controller for these systems is presented. The system is assumed to have norm-bounded uncertainties which are independent in every matrix involved in its state space realization. To ensure asymptotic stability...
In this paper, we propose a graph-theoretic algorithm that can be used to analyze complex chemical processes comprising of multiple energy integration loops. Such networks are known to exhibit dynamics in multiple time scales. The algorithm uses information on the order of magnitude of the different energy flows and determines automatically the time scales where the units evolve, the manipulated inputs...
Given that the eco-efficiency of industrial processes/plants has become important, engineers need to find a way to integrate control loop configuration and measurements of eco-efficiency. The exergy eco-efficiency factor, a new measure of eco-efficiency for control loop configuration has been developed. The exergy eco-efficiency factor is based on the thermodynamic concept of exergy which can be used...
Passive systems theory is used to develop a general procedure to design the control structure of chemical process networks. A natural storage function, derived from the second law of thermodynamics, is the basis for passivity-based control design. The inventory control laws are implemented locally and individual units become passive. With all units in a chemical processing plant designed to be locally...
In this paper a hierarchical control structure appropriated to recirculating aquaculture processes is proposed. The control software consists in two levels. The first level is the low level and deals with the basic control functions of the process such as: the control of the dissolved oxygen concentration and the temperature monitoring in the aquaculture tanks, the pH control after the mechanical...
Current network processors (NPs) increasingly deal with packets with heterogeneous processing times. As a consequence, packets that require many processing cycles can significantly delay low-latency traffic, because the common approach in today's NPs is to employ run-to-completion processing. These difficulties have led to the emergence of the Multipass NP architecture, where after a processing cycle...
In industries now a day the control of chemical process is important craft. Mostly all the chemical process are highly nonlinear in nature this cause instability of the process. This paper deals with basic simulation studies on of the interactive thermal process. The Combination processes of Continuous stirred tank reactor (CSTR) and heat exchanger were controlled and the mathematical model was developed...
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