A CONFIGURABLE CONTROL SYSTEM FOR SMART STRUCTURE RESEARCH

摘要

This paper describes a self-contained four-channel programmable controller designed to provide flexible sensing and control functions for situations requiring heavy computational load, real-time control, high-speed data acquisition, and fast signal processing. Based on a single-board Pentium computer, the SS10 incorporates eight channels of signal-conditioned input and four channels of controlled output. The input can be tailored to use a variety of sensing devices including strain gauges, piezoelectric ceramics, or other commercially available sensors. The outputs are controlled voltages that can range from -10 to +10Volts. The range of possible applications is extensive thanks to the unit's easy re-programmability and the ability of the onboard computer to run a number of operating systems, including Linux, DOS, Windows, and RTOS. Depending on the algorithm programmed into the computer, the SS10 can be used for piezo servomechanism control, smart structure research, active vibration and shape control and analysis, and many other situations where fast analysis and short response times are essential. The configurable controller is shown to offer a suitable platform for the successful implementation of control laws for inducing static deflection, resonant vibration, and active vibration control of a beam equipped with strain gauges, while subject to excitations from piezoceramic actuators.