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The approach focuses on improving system performance by effectively managing the complexities inherent to these systems. The controller incorporates Decentralized Second\u2009Order Sliding Mode Control (2SMC) to bolster robustness against fluctuations. The study also presents an event-triggered implementation of 2SMC, offering potential benefits such as reduced computational load and enhanced efficiency. Rigorous robustnness analysis of the proposed controllers strategies demonstrates their effectiveness in achieving desired system behavior. Through simulation examples, the paper thoroughly evaluates the performance of the proposed controllers, highlighting their robustness and applicability in discrete interconnected fractional order systems. 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