The random time delay in a networked control system can usually deteriorate the control performance and stability of the networked control system. In order to solve this problem, this paper puts forward a networked control system random time-delay compensation method based on time-delay prediction and improved implicit generalized predictive control (GPC). The least squares support vector machi...

We demonstrate wideband all-order polarization mode dispersion (PMD) compensation by applying high-speed spectral polarization sensing and ultrafast pulse shaping techniques to characterize and correct the frequency-dependent Jones matrix associated with PMD of optical fibers on a wavelength-by-wavelength basis. We report full compensation of approximately 800 fs pulses distorted to more than 1...

The need for efficient compensation schemes to counter the impact of process variations on the parametric yield of designs has increased in the nm design era. In this paper, a process variation compensation technique that uses both delay and slew metrics has been proposed to determine the optimal NMOS and PMOS body-bias voltages to improve parametric yield of the designs. The need to consider b...

Long-term memory prediction extends the spatial displacement vector utilized in hybrid video coding by a variable time delay permitting the use of more than one reference frame for motion compensation. This extension provides improved rate-distortion performance. However, motion compensation in combination with transmission errors leads to temporal error propagation that occurs when the referen...

Two control laws, to control the liquid pressure of an agricultural spray boom are presented and compared. Characteristic for the process is a dead zone and a time varying delay. The first control law is rather intuitive and is based on direct dead zone compensation and a pole placement idea. The other control law originates from sliding mode control where the continuous part of the control con...

Figure l(b) shows the wavelength-dependent time delay under different stretching voltages. The slope of the curve (i.e., the dispersion) at the operating laser wavelength can be changed by varying the PZT voltage. This grating enables compensation of dispersion accumulated for various distances as well as the dispersion accumulated in multiple subcarriers. Figures 2(a) and 2(b) show the effect ...

Introduction: Polarisation division multiplexing (Pol-Mux) is an important method to improve spectral efficiency in lightwave communications. For Pol-Mux used in ultra-high-capacity fibre systems, polarisation mode dispersion (PMD) [1] not only distorts and broadens the signal, but also couples polarisation-multiplexed channels. In the case of large PMD, this coupling becomes strongly frequency...

In this paper, a novel structure for a communication disturbance observer in teleoperation systems is proposed to achieve robust stability. A time delay compensation method based on the concept of network disturbance and a communication disturbance observer (CDOB) has been proposed in past research. Unlike model-based approaches, it works without a time delay model. Therefore, it can be impleme...

The purpose of this work is to study machine-learning-based model predictive control nonlinear systems with time-delays. proposed approach involves initially building a machine learning (i.e., Long Short Term Memory (LSTM)) capture the process dynamics in absence time delays. Then, an LSTM-based controller (MPC) designed stabilize system without Closed-loop stability results are then presented,...