It has been established that shunt active power filters are suitable for compensating harmonics in the current fed type harmonic producing loads, likewise the series active power filter (APF) are considered to be suitable for voltage fed type harmonics-producing load. This paper discusses the indirect current control approach in terms of its simplicity and effectiveness for the operation of a s...

Second and third-order monolithically integrated coupled ring bandpass filters are demonstrated in the InP-InGaAsP material system with active semiconductor optical amplifiers (SOAs) and current injection phase modulators (PMs). Such integration achieves a high level of tunability and precise generation of optical filters in the RF domain at telecom wavelengths while simultaneously compensating...

Active power filters are widely used for the reduction of harmonics in the power system caused by nonlinear loads. The Shunt Active Power Filter (SAPF) injects a suitable compensating current at a point of the line known as the point of common coupling (PCC) so that the harmonics present in the line are cancelled out and the sinusoidal nature of voltage and current waveforms are restored. A thr...

Fast convolution processing has recently been proposed as an efficient means for implementing filter bank multicarrier systems with good spectral containment and high flexibility in tuning the subchannel bandwidths and center frequencies. These features make fast convolution filter banks (FC-FBs) a particularly interesting choice for multicarrier transmission in challenging radio scenarios like...

Variable speed main spindle drives of machine tools are usually fed by three-phase two-level inverters. Because of the switching operating mode of these inverters, the motor voltages and currents contain harmonics which do not contribute to torque formation but solely to an undesirable warming of motor spindle elements. This warming results in thermal elongation of the spindle shaft and therefo...

The disturbance observer (DOB) has been a popular robust control approach for servo enhancement in single-input single-output systems. This paper presents a new extension of the DOB idea to dualand multi-input single-output systems, and discusses an optimal filter design technique for the related loop shaping. The proposed decoupled disturbance observer (DDOB) provides the flexibility to use th...

For the linear discrete time-invariant system with uncertain parameters and known noise variances, a robust covariance intersection (CI) fusion steady-state Kalman filter is presented by the new approach of compensating the parameter uncertainties by a fictitious noise. Based on the Lyapunov equation approach, it is proved that for the prescribed upper bound of the fictitious noise variances, t...

A decentralized feedback control scheme is proposed for optimization of large-scale systems. First, local controllers are used to optimize each subsystem, ignoring the interconnections. Next, an additional compensating controller was applied to minimize the effect of interactions and improve the performance of the overall system. At the cost of the suboptimal performance, this optimization stra...

This paper presents an adaptive Digital Predistorter (DPD) to handle the nonlinearity and memory challenges that effect transmitted signal in High Power Amplifier (HPA) system. The proposed scheme first handles by estimating reverse error, then obtained is processed FIR filter diminish effect. simulation results of method present a superior performance compared with state-of-the-art methods use...