ABSTRACT This application report discusses a UCD91xx-based digital controller design for a high-frequency dc-dc switching power supply. Starting with a dc-dc buck converter power stage and a given set of performance specifications, different control blocks and parameters, used as in the analog control design approach, are reviewed prior to the digital controller design. The control loop is then...

This paper presents the design of an integral sliding-mode controller for a piezoelectric-actuated system. The sliding-mode disturbance (uncertainty) estimation and compensation scheme is used. The nonlinear piezoelectric-actuated system is modeled as a first order linear model coupled with a hysteresis. When the model is identified, the hysteresis nonlinearity is linearized then the linear sys...

Abstract: As products are required with higher precision, vibration control becomes more important for precision machining and inspection. A stage with both fast positioning and relative vibration eliminated can improve product quality. Elastomeric bearings are widely used in the seismic engineering and precision machining fields. By utilizing their stiffness anisotropy, miniaturized bearings c...

Timed CPN model of SMC controller communication subsystem is described. SMC controller operates as central unit in a small distributed control-andmeasurement system from LUMEL Zielona Góra. SMC is programmed in ST language available in CPDev design environment. Implementation of the communication subsystem involves communication tasks created during the design stage and executed by SMC taking i...

In this paper, we present experimental results on altitude control of a flying microrobot. The problem is approached in two stages. In the first stage, system identification of two relevant subsystems composing the microrobot is performed, using a static flapping experimental setup. In the second stage, the information gathered through the static flapping experiments is employed to design the c...

The power stage of the PWM DC-DC converter is modeled and analyzed using the sampleddata approach. This work complements the companion paper [1] which develops sampled-data models and analysis for the closed-loop converter. Separate models for the power stage are essential for controller design. The work addresses continuous and discontinuous conduction mode under voltage mode control, and cont...

The power stage of the PWM DC-DC converter is modeled and analyzed using the sampleddata approach. This work complements the companion paper [1] which develops sampled-data models and analysis for the closed-loop converter. Separate models for the power stage are essential for controller design. The work addresses continuous and discontinuous conduction mode under voltage mode control, and cont...

This work develops a dual-controller composed of a macroscopic controller (MAC) and a microscopic controller (MIC) for improving motion precision of a linear-motor-driven motion system. Based on the macroscopic model in which Coulomb friction model is considered, the MAC is designed. In the presliding region however, the MIC design is based on the lineralized microscopic model. Furthermore, a s...

increasing of word demand load caused a new distributed generation (dg) to enter to powersystem. one of the most renewable energy is the photovoltaic system. it is beneficial to use thissystem in both separately as well as connected to power system using power electronics interface.in this paper an optimal pid controller for photovoltaic system systems has been developed. theoptimization techni...

This paper presents a power electronic interface converter based on asymmetric Γ-Source Inverter for photovoltaic application. The average state space model of the system is used for modeling of the proposed converter system. According to the obtained model of system, a two stage controller is designed to regulate the capacitor voltage of the impedance network to its required voltage and regula...