Refined reaching laws for sliding mode control of discrete time systems

Bartoszewicz, Andrzej; Leśniewski, Piotr

doi:10.1109/mmar.2013.6670019

Cited by 1 publication

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are, however, some improvements in the approach, in the form of variable convergence parameters in [48,49], but they result in nonlinearities in the closed loop description, so they are not applicable here. By combining the sliding surface (5) with the reaching law (6), Equation 7can be obtained.…”

Section: Sliding Mode Current Controlmentioning

confidence: 99%

“…As the maximum value of the integral is hard to predict, it can result in control signal saturation. The second solution to deal with disturbance is to prescribe model uncertainties, and include their assumptions in the sliding surface, as in [48,50]. The control signal can, therefore, be predicted in the development phase of control to be always within the interval [0, 1], so there is no need for limitation.…”

Section: Design Of a Disturbance Observer For Current Controlmentioning

confidence: 99%

“…The system is linear, and its stability can be checked by calculating eigenvalues of the system matrix (48).…”

Section: Design Of a Disturbance Observer For Voltage Controlmentioning

confidence: 99%

“…By putting (47) into (48), eigenvalues λ v1 , λ v2 from the controller and eigenvalues λ v3 , λ v4 from the observer are gained in (49). For the system to be stable, all eigenvalues should be inside the unit circle.…”

Section: Design Of a Disturbance Observer For Voltage Controlmentioning

confidence: 99%

See 3 more Smart Citations

Control of a Multiphase Buck Converter, Based on Sliding Mode and Disturbance Estimation, Capable of Linear Large Signal Operation

2019

View full text Add to dashboard Cite

Power-hardware-in-the-loop systems enable testing of power converters for electric vehicles (EV) without the use of real physical components. Battery emulation is one example of such a system, demanding the use of bidirectional power flow, a wide output voltage range and high current swings. A multiphase synchronous DC-DC converter is appropriate to handle all of these requirements. The control of the multiphase converter needs to make sure that the current is shared equally between phases. It is preferred that the closed-loop dynamic model is linear in a wide range of output currents and voltages, where parameter variations, control signal limits, dead time effects, and so on, are compensated for. In the case presented in this paper, a cascade control structure was used with inner sliding mode control for phase currents. For the outer voltage loop, a proportional controller with output current feedforward compensation was used. Disturbance observers were used in current loops and in the voltage loop to compensate mismatches between the model and the real circuit. The tuning rules are proposed for all loops and observers, to simplify the design and assure operation without saturation of control signals, that is, duty cycle and inductor current reference. By using the proposed control algorithms and tuning rules, a linear reduced order system model was devised, which is valid for the entire operational range of the converter. The operation was verified on a prototype 4-phase synchronous DC-DC converter.

show abstract

Section: Sliding Mode Current Controlmentioning

confidence: 99%

Section: Design Of a Disturbance Observer For Current Controlmentioning

confidence: 99%

“…The system is linear, and its stability can be checked by calculating eigenvalues of the system matrix (48).…”

Section: Design Of a Disturbance Observer For Voltage Controlmentioning

confidence: 99%