In the field of civil engineering, control systems are conceived to mitigate the structural response under external excitation. In this paper, a digital proportional-integral-derivative (PID) servo position controller is newly designed to drive a direct current (DC) motor which is combined with a mass to form the actuator of an active mass damper (AMD). The new PID servo controller is mainly based on a System-on-Chip Radio-Frequency transceiver CC1110 where the PID algorithm is implemented by firmware and the H Bridge LMD18200 serves as a power amplifier. The parameters of the controller are configurable through the HyperTerminal software and a virtual serial port implemented by an RS232-USB adapter. Furthermore, a wireless sensing system based on the transceiver CC1110 is also introduced in the control system to replace the previous coaxial cables connecting the sensors and the controller. The AMD is located at the top of a reduced-scale, three-story steel frame mounted on a small shaking table. Laboratory tests are carried out to verify the efficacy of the overall active control system.
A DC-Motor Based Active-Mass-Damper with Wireless Feedback for Structural Control
CASCIATI, SARA;FARAVELLI, LUCIA;CHEN, ZHICONG
2011-01-01
Abstract
In the field of civil engineering, control systems are conceived to mitigate the structural response under external excitation. In this paper, a digital proportional-integral-derivative (PID) servo position controller is newly designed to drive a direct current (DC) motor which is combined with a mass to form the actuator of an active mass damper (AMD). The new PID servo controller is mainly based on a System-on-Chip Radio-Frequency transceiver CC1110 where the PID algorithm is implemented by firmware and the H Bridge LMD18200 serves as a power amplifier. The parameters of the controller are configurable through the HyperTerminal software and a virtual serial port implemented by an RS232-USB adapter. Furthermore, a wireless sensing system based on the transceiver CC1110 is also introduced in the control system to replace the previous coaxial cables connecting the sensors and the controller. The AMD is located at the top of a reduced-scale, three-story steel frame mounted on a small shaking table. Laboratory tests are carried out to verify the efficacy of the overall active control system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
