In this paper, an approach for online relay automatic tuning of multi-loop PI controllers is described for multivariable processes. In the absence of significant inter-loop crosscoupling, only one closed-loop experiment may be necessary to tune the controllers to achieve specified closed-loop characteristics. When the inter-loop interaction is significant, multiple relay experiments can be cond...

Abstract Based on the current deuterium metabolism imaging (DMI) technology analysis, a design scheme of dual-core coil suitable for 7T MRI system is proposed. The size and structure shield layer are optimized. single-layer structure, double-layer proposed to improve stability probe. A detuning circuit added 2 H transmitting receiving coils so that they can work in time better decoupling. Accor...

The aerothermic process is a pilot scale heating and ventilation system equipped with a heater grid and a centrifugal blower. The interaction between its main variables is considered as challenging for mono-variable controllers. A change in the ventilator speed affects the temperature behavior which represents a factor that must be managed for energy saving and the human welfare. This paper pre...

Abstract—In this paper, the analytical tuning rules of IMC-PID controller are presented for the multivariable Smith predictor that involved the ideal decoupling. Accordingly, the decoupler is first introduced into the multivariable Smith predictor control system by a well-known approach of ideal decoupling, which is compactly extended for general nxn multivariable processes and the multivariabl...

Heat exchanger networks present an interesting control problem due to coupling among process streams. In this work, the linear quadratic regulator (LQR), a feedback optimal control technique, is used to control stream temperatures on a laboratory scale heat exchanger network, through bypass manipulation, in a multivariable system. The LQR design was based on a mathematical model of the plant an...

Testing of Limited Streamer Tubes (LSTs) has been conducted on the first set of LSTs meant for installation in the BABAR detector. The tubes are kept under high voltage (between 5 and 6 KV) as often as possible to ensure their durability. Three tests were conducted: signal charge, leak and radioactive source. Testing is conducted to ensure that no damage occurred during transport of the LSTs fr...

A baseline correction routine that eliminates dispersive tails extending from the water tr noise band in 2D NMR spectra has been developed. Streaks along the w2 axis (Fig. la) spreading from the w2 position of the water resonance are among the most perturbing artifacts in 2D NMR spectra where the water signal is reduced by presaturation. In our experience, these streaks have dispersive lineshap...