This paper describes the development of H∞ controllers for two helicopter models. The study was first carried out using rigid body state feedback only and was then extended to include the rotor flap and lag states. It was observed that the H∞ controllers gave better robustness and performance than the baseline controllers. Moreover, using rotor state feedback, it was possible to design high ban...

Upscaling based on the bandwidth of the kernel function is a flexible approach to upscale the data because the cells will be coarse-based on variability. The intensity of the coarsening of cells in this method can be controlled with bandwidth. In a smooth variability region, a large number of cells will be merged, and vice versa, they will remain fine with severe variability. Bandwidth variatio...

We present lessons from implementing a bandwidth probing scheme termed chirping as part of congestion control in the Linux kernel. Chirping was first introduced for bandwidth estimation in the pathChirp tool. A chirp is a group of several packets that are sent with decreasing inter-packet gaps in order to continuously probe for spare bandwidth. Current congestion control schemes are either slow...

One of the main challenges in video transmission is understanding and adapting to the varying network bandwidth. The traditional approach of bandwidth estimation is not accurate as there are many factors like congestion that can delay the arrival rate of the ping packet which may lead to a misconception that the bandwidth was low. Thus, the better approach to this problem will be to estimate th...

High performance high bandwidth control of power electronic converters, inverters, and motor drives has become feasible over the past decade. These devices behave as constant power loads over large bandwidths when they are tightly regulated. However, constant power loads have a severe side affect known as negative impedance instability. In order to mitigate the problem of negative impedance ins...

A low-voltage low-power CMOS operational transconductance amplifier (OTA) with near rail-to-rail output swing is presented in this brief. The proposed circuit is based on the current-mirror OTA topology. In addition, several circuit techniques are adopted to enhance the voltage gain. Simulated from a 0.8-V supply voltage, the proposed OTA achieves a 62-dB dc gain and a gain–bandwidth product of...

A transimpedance amplifier (TIA) is designed based on the first order wave equation. The feedback resistance is set as the ohJective function for transimpedance. The main feedback amplifier provides transimpedance and a wide band compensation amplifier determines the characteristics of overall TIA. The stability of lhe T lA is not affected due to the open loop nature of compensation. Simulation...

We consider binary communication over the additive white Gaussian noise channel with no bandwidth constraint on the channel input signals, assuming the availability of a noiseless delayless feedback link. Although the signals at time t can depend on the noise at times 7 < t and are therefore random functions, we require that the signal energy never exceed a fixed level. We show that the optimal...

This paper describes the development of H∞ controllers for two helicopter models. The study was first carried out using rigid body state feedback only and was then extended to include the rotor flap and lag states. It was observed that the H∞ controllers gave better robustness and performance than the baseline controllers. Moreover, using rotor state feedback, it was possible to design high ban...