The article is devoted to solving of the problem identification a complex dynamic plant with distributed parameters - plasma in tokamak magnetic field. This solved not use advanced techniques identification, such as subspace method or wavelets, but application laws physics and knowledge controlled plant. Models are constructed from measurements by ill-posed Hadamard's sense boundary value using least squares method. Essentially, this equilibrium distribution poloidal flux, toroidal current...

This paper presents a methodology for synthesizing discrete MIMO PID controllers through iterative solutions of LMIs. It justifies the necessity direct synthesis in digital control systems. The proposed allows an LTI controller LTV plant model, ensuring robust stability synthesized system. Robustness is further ensured by small-gain theorem and novel approach to loop shaping, enabling use arbitrary shape functions. As result, this provides broad statement problem with performance criteria...

This paper reports the results of design and modeling a hierarchical control system for ITER plasma shape, position current. The contains three hierarchy levels. first level is model correcting loop with feedback constant matrix. second consists two loops: fast SISO vertical stabilization slow MIMO current shape loop. Both loops have controllers which were designed by an H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</sub> shaping approach...

The paper deals with design and simulation of hierarchical multi-loops feedback magnetic plasma control system on the base experimental data for operating Globus-M spherical tokamak in line special methodology developed. components are designed to achieve high-performance operation during short pulses discharges about 200 ms. equilibrium reconstruction algorithm regularization terms moving filaments without iterations was LPV plant model derived from reconstructed equilibriums as a...

A new robust hierarchical plasma magnetic control system with time-varying parameters and cascade circuits for the Globus-M2 tokamak (Ioffe Institute) has been synthesized by means of linear matrix inequalities (LMI) method. Each a separate objective: placing poles closed-loop in D-region to guarantee performance, restriction H∞-norm transfer function between external disturbances plant outputs system, tracking PF-currents, CS-current, current, position, gaps separatrix first wall. Control...

The paper presents the results of design and simulation linear impulse control systems a plasma unstable vertical position for three DINA-L models tokamak T-15. were obtained from plasma-physics DINA code on current flat top T-15 scenario corresponded to different locations horizon field coil: outside toroidal coil, between coil vacuum vessel, inside vessel. For controllers loop shaping approach was used. designed simulated in feedback with types power supply models: element, pulse-width...

In modern vertically elongated tokamaks it is critically important to maintain plasma near the first wall at diverter phase of a scenario. The reason for this allow equilibrium reconstruction in real time, based on external magnetic measurements plasma. This paper suggests simulation approach obtain position, current, and shape control, with code used feedback. new basic idea such combine scenario signals data coming from linear model tokamak experimental data. sum comes code, which...

The article is devoted to a comparative study of VIs (Voltage Inverters) in the RAO (Relay Auto-Oscillatory) mode and multilevel PWM (Pulse Width Modulation) as actuators closed-loop control systems vertical plasma motion T-15MD tokamak. new digital controller was developed. Both were put under equivalent conditions terms same response external signals. discrete robust single for both has been designed by LMI (Linear Matrix Inequalities) approach using LPV Parameter Varying) plant model....

Various concepts of tokamaks as leaders in solving the controlled thermonuclear fusion problem are presented. The evolution from round vertical cross-section with a large aspect ratio up to small including spherical ones is characterized. classification modern according their poloidal systems location field coils inside and outside toroidal coil given, taking into account presence vacuum vessel stabilize plasma position. methods diagnostics by magnetic measurements plasma, actuators for both...

The mode of operation for single-phase thyristor current inverter (CI), allowing to control the current's value in an inductive load, is proposed. algorithm CI, forming average (on a period auto-oscillations) output voltage, proportional input signal at minimal voltage amplitude, designed. initial stage CI (current increasing through energy storage and CI's launching into auto-oscillation operation) autonomous protection elements are presented. experimental test done has demonstrated...

The paper reports results on the design and analysis of multivariable feedback Hinfin; robust system for plasma current, position shape control in fusion energy advanced tokamak (FEAT) developed International Thermonuclear Experimental Reactor (ITER) project. contains fast loop with SISO vertical speed controller slow MIMO current controller. goal is to study resources robustness achieve a higher degree FEAT operation reliability. Two block diagonal controllers {K SISO, K MIMO} were designed...

Various systems of magnetic control plasma position, current, and shape are considered in vertically elongated tokamaks including spherical being operation. The Resistive Wall Modes suppression described. Tokamaks constructions cross-sections, structural schemes given; heed is paid to operating principles systems; experimental results given. engineering realizations presented.

The problem of accurate and reliable plasma shape control is significant, both for modern operating tokamaks, example the Globus-M/M2 spherical tokamak, future thermonuclear tokamak-reactors using magnetic confinement. article presents new results design modeling system tokamak with pre-trained artificial neural network as a equilibrium reconstruction algorithm, which included in feedback system. To collect necessary data training to model developed evolutionary code was used.

The paper deals with the identification of plasma equilibrium reconstruction in D-shaped tokamaks on base external magnetic measurements. methods such are directed to increase their speed response when discharges relatively short, like spherical Globus-M2 tokamak (Ioffe Inst., St. Petersburg, Russia). new approach is first apply data off-line algorithm based Picard iterations, and obtain gaps between boundary wall, second gap values, producing shape models operating real time. inputs for...

The paper presents the improved FCDI plasma equilibrium reconstruction algorithm implemented at Globus-M2 tokamak. has been to be able operate in real time. FCDI-FF (Fixed Filaments) operation mode was added, which is modeled by current filaments fixed positions. New user interface for displays reconstructed separatrix and contours of internal magnetic surfaces, poloidal flux distribution, graphs parameters, including profiles pressure, safety factor q, energy, beta inductance, can exported...

The paper deals with the design and simulation of control systems for an unstable plasma vertical position linear model using Linear Matrix Inequalities (LMI) approach. It is necessary to suppress minor disruptions stabilize a system output during discharge. problem state feedback stabilization different LMI regions (left half-plane, strip region, intersection sector left half-plane) has been solved, as well H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

The paper presents cascade tracking system for plasma current and shape in ramp-up stage. internal currents magnetic coils was designed by means of full dynamic decoupling. For the external design pseudo-inverse decoupling techniques used together with original diagonal PII-controller containing parallel connection proportional, integral, double-integral units each channel. 2nd order model vertical instability obtained identification methodology on plasma-physics DINA code scalar loop...