Recently, the security issues in networked control systems have become a major challenge, since networked control systems (NCSs) are vulnerable to malicious attacks. In this paper, a new event-triggered mechanism (ETM) is proposed, under which data packets could be actively dropped within consecutive steps, saving more communication resource than the existing ETM. Moreover, the effect of Denial-of-Service (DoS) attacks obeying Bernoulli distribution is considered and analysed. Furthermore, the corresponding estimation error covariance of the state is derived and the performance of system is analysed under the ETM both in the absence and presence of DoS attacks. Finally, the effectiveness of the proposed ETM is demonstrated by Monte Carlo simulation experiments and the feasibility of theoretical results is validated by numerical examples.

最近，由于网络控制系统（NCS）容易受到恶意攻击，因此网络控制系统中的安全问题已成为一项主要挑战。在本文中，提出了一种新的事件触发机制（ETM），在这种机制下，可以在连续的步骤中主动丢弃数据包，从而节省了比现有ETM更多的通信资源。此外，考虑并分析了拒绝服务（DoS）攻击遵循伯努利分布的影响。此外，在不存在和存在DoS攻击的情况下，在ETM下导出状态的相应估计误差协方差，并分析系统的性能。最后，通过蒙特卡罗模拟实验证明了所提方法的有效性，并通过数值算例验证了理论结果的可行性。