Design Of Active Control System Using Aco Based Pid Controller For Civil Structure Under Seismic Excitation

Abstract

The point of this research work is to develop structural control under seismic excitation. The background of this control mechanism is discussed in introduction part. In the second part, the reviews of literatures are discussed with their limitation and the third part includes the modeling of the civil building (2floor) structure to control, active control system with feedback mechanism has been developed. This feedback mechanism, PID controller with active mass damper is discussed with their designed specification and modeling. Active mass damper system and PID controller were designed for mitigating vibrations along the civil structure due to wind and earthquake. ACO and PSO algorithm are developed for tuning PID parameters. ACO based PID control mechanism has better performance and fast response. The sensor with dual properties has developed for vibration motion of the structure, this sensor is called piezoelectric sensor. Which can work with inverse operation and direct operation, in this thesis work direct operation or sensor operation was considered to sense vibration of the structure under earthquake. And 0.085ac voltage was produced. In spite of the ac output produced by piezoelectric element, rectifier is placed at the output side of the piezo element to convert ac to dc. And produced Dc voltage is low; boost converter is applied to step up this voltage and produces 11.18 Vdc. Dc motor as actuator was designed and produced mechanical force to apply in to active mass damper which is modelled in side of the civil structure. Actuator force produced is 1.9 ∗ 10−3N and disturbance force is −2.7 ∗ 10−5N.