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This paper describes the reliability comparison of different schemes connection for Electrical Power Subsystem (EPS) of satellite. EPS has to be able to provide sufficient power to the satellite subsystems under all possible satellite attitudes. There are eight schemes for EPS, which could be used for power supplying. In these schemes, two main system groups are Peak Power Tracking (PPT) and Direct Energy Transfer (DET) systems. Also in each system, we have four different connections which are Unregulated Bus Using Parallel Batteries, Unregulated Bus Using Linear Charge Current Control Recharge Control, Quasi-Regulated Bus with Constant Current Chargers and Systems Using a Fully Regulated Bus. In this paper we will compare the reliability of different schemes and will introduce the best reliable connection in these two systems for ESP.

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The characteristics of the mobile ad hoc network (MANET), such as no need for infrastructure, high speed in setting up the network, and no need for centralized management, have led to the increased popularity and application of this network in various fields. Security is one of the essential aspects of MANETs. Intrusion detection systems (IDSs) are one of the solutions used to ensure security in this network. Clustering-based IDSs are very popular in this network due to their features, such as proper scalability. This paper proposes a new algorithm in MANETs to detect black hole attack using the K-nearest neighbor (KNN) algorithm for clustering and fuzzy inference for selecting the cluster head. With the use of beta distribution and Josang mental logic, the trust of each node will be calculated. According to the reputation and remaining energy, fuzzy inference will select the cluster head. Finally, the trust server checks the destination node. If allowed, it notifies the cluster head; otherwise, it detects the node as a malicious node in the black hole attack in each cluster. The simulation results show that the proposed method has improved the packet loss rate, throughput, packet delivery ratio, total network delay, and normalized routing load parameters compared with recent black hole detection methods.