WIRELESS NETWORK BASED EMBEDDED CONTROL DESIGN METHOD FOR ACTUATORS WITH UNCERTAIN DELAYS

摘要

Insertion of wireless communication network in the automation application (automatic control system) refers to wireless network control system (WNCS). Thus combining wireless communication and automatic control theories for development of a technology is not straight forward. The amalgamation of two theories leads to serious deterioration in control system performance due to various network-induced imperfections like uncertain time-delays, data-loss, packet drop-outs, fading of the signal power, noise interference and many other factors. Out of all the challenges, occurrence of uncertain large time-delay in the signals leads to severe change in the dynamical behavior of the physical system under control. This invention can detect or estimate the uncertain time-delay arising due to wireless network between sensor and actuator end. After estimating the time-delay it has the capability to compensate the delay effect of the network in real-time thereby imparting desired control performance through the actuation system (viz, motor, actuators etc.) and also guaranteeing the system stability. The invention houses multiple sensor and actuator pairs for a single application. The communication facility between one sensor-actuator pair can be appropriately identified leading to appropriate execution of control action at one moment. The entire architecture and method of the invention is implemented on an embedded hardware device with real- time communication and control.