This paper proposes a robust integral sliding mode (RISM) manifold and the corresponding stabilization control law for uncertain systems with multiple time-varying time delays based on the techniques of linear matrix inequalities (LMI). The sufficient condition for the existence of the RISM manifold is given in terms of LMI, and then, the sliding mode control (SMC) law that can keep the system state on the RISM manifold from the initial time moment is developed. The efficiency and feasibility of the results are illustrated by a numerical example.
Some customer satisfaction measurement systems suffer from long response times. A customer satisfaction measurement system based on grey fuzzy theory is designed to improve the timeliness of this type of system. The hardware logic connects the output of TIM2 CH2 timer 2 of STM32 with the FSELECT pin input of AD9831 to switch the modulation frequency to send FSK signal; identify the customer type, extract the initial variables of customer satisfaction, use the top few principal components as the unrotated common factors, construct the satisfaction evaluation matrix based on grey fuzzy theory and optimise the system The function of the measurement management module was optimized. Experimental results: The average response time of the designed customer satisfaction evaluation system is 71.084ms, which indicates that the customer satisfaction evaluation system is more universal under the influence of grey fuzzy theory.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.