In the pursuit of generic methods, control theory has become separated from its prime objective: the control of physical systems. These generic techniques have a wide range of applications yet do not easily allow inclusion of system speci c information into the control design. There are two important categories for which the inclusion of system-speci c information is important: partially-known ...

The paper presents a method for H-infinity controller design for a system affected by parametric uncertainty. The proposed method is based on minimising infinity norm of sensitivity function of the nominal system. The design approach is verified by robust stabilization and control of an unstable and perturbed continuous stirred tank reactor (CSTR) with hydrolysis of Propylene Glycol. The contro...

The design and operation of a differential polymer electrolyte membrane (PEM) fuel cell is described. The fuel cell design is based on coupled stirred tank reactors (STRs) coupled through a membrane; the gas phase in each reactor compartment is well mixed. The characteristic times for reactant flow, gas phase diffusion, and reaction were chosen so that the gas compositions at both the anode and...

The paper deals with simulation of continuous-time adaptive control of a continuous stirred tank reactor (CSTR). The control design is based on approximation of a nonlinear model of the process by a continuoustime external linear model.with parameters estimated using a corresponding delta model. The control system with two feedback controllers is considered. The controller design is based on th...

Polymers are the products of processes and their microstructure can be changed significantly by the reactor systems employed, especially for nonlinear polymers. The Monte Carlo simulation technique, based on the random sampling technique, is used to explore the effect of reactor types on the branched polymer structure, formed through free-radical polymerization with simultaneous long-chain bran...

a laboratory stirred tank bioreactor with six single and dual-impeller configurations was tested to obtain the optimum operating conditions for future biological processes. six impeller combinations consisting of three basic impeller types, namely rushton turbine (rt), pitched 4blade (p4b) and pitched 2blade (p2b) downward flow were investigated in 1.77 l bioreactor working volume. power consum...

The cover feature image shows the industrial production of nanosheets. First, ingredients are poured into continuously stirred tank reactor. reacted solution is separated at next tank. suspension nanosheets centrifuged, and obtained packed vessels as concentrated suspensions. practical use requires development a facile versatile synthesis method controlling size low cost to be scaled up. More i...

the present work examines leaching of lipoxygenase-1 from soybean flour employing stirred tank vessel. the effect of operating parameters, impellers speed, operational period, temperature, ph and scale-up were considered.the acetic acid ph: 5.2 increased the leaching of lipoxygenase- 1.the sensitivity of agitator speed and geometrical-scale-up on the enzymeleaching has been conducted. the effec...