Flutter Control of a Lifting Surface via Visco-Hysteretic Vibration Absorbers

Sweeping piezoelectric patch vibration absorbers

This paper presents a simulation study concerning the low-mid frequencies control of flexural vibration in a lightly damped thin plate, equipped with five time-varying shunted vibration absorbers. The panel is excited by a rain-on-the-roof broad frequency band stationary disturbance. The absorbers are composed of piezoelectric patches connected to time-varying RL shunt circuits. Continuous, swe...

Control-Surface Flutter with the Stick Free

Vibration and Flutter Flight Testing

A mvkrr is made of the techniqws that have been developed or are being developed in the United Kilngdon for flight vibration testing and flight flutter testing aircraft. This includes a description of the instnznentation used for recotiing the Vibratioml response, and a comparative assessment of the vaious methods used for exciting the aircraft in i'lipht flutter tests.

Vibration Attenuation of Nonlinear Hysteretic Structures with Fully Unknown Parameters

Natural hazards such as earthquakes have threatened the life of human beings during the history.As a consequence, the vibration mitigation of structures has caught great importance. Activecontrol of structures is one of the rapidly emerging areas in the concept of structural control. Thispaper presents a control method to deal with this subject when the dynamics of the structure ishysteretic an...

A Novel Hysteretic Control Circuit

The use of hysteretic control for current regulators is very applicable to LED drivers. It is easy to sense the current in the FET but this is comprised of only the positive ramp. The FET current waveform makes it simple to turn the switch off at the correct peak value of drain current; however, the information from the negative ramp is not available in the path of the FET. This paper examines ...