主要是对多选择合作对策中核心概念的扩展研究,称之为最大限定核心.首先,依据经典对策下核心的概念,针对多选择合作对策中参与者不参与和以最高水平参与联盟合作的情形,给出了多选择合作对策中最大限定核心的定义.然后,介绍了多选择对策中最大限定核心是非空的充要条件是该多选择对策是弱均衡对策.最后,构造了基于最大限定核心的简约对策,并应用1人合理性、弱个体合理性、一致性和逆一致性对其进行公理化.

In this paper,introduced a kind of aviation actuation system made up of brushless DC motor(BLDCM)and mechanism of worm and gear.For the requirement of performance,the strategy of three closed loops control including position loop,speed loop and current loop were adopted.The control system was modelled and simulated in Matlab/Simulink.And the simulation results show that the time of response characteristic is shorter and precision is higher in the whole control system.The method of three closed loop control is feasible in aviation actuation system based on BLDCM.

A simulation model of a 6/4 poles switched reluctance generator(SRG) system was built to study the fault-tolerance performance of SRG System for More-Electric Aircraft(MEA).On the basis of this model,several fault conditions such as,converter switch fault,load fault,prime motor fault,phase windings fault and so on,were simulated,and the simulation results including output voltage and phase current were presented.This paper analyzed the mechanism of the fault running and presented some methods to avoid the destructive faults.The research results indicate that SRG has a better fault-tolerant capability and is applicable to the main source of electrical power of MEA.The modeling method and simulation results of fault have certain reference value to fault diagnosis and fault-tolerant research of SRG systems.

An aviation electric lock control system made up of brushless DC motor (BLDCM) and mechanism of worm and gear was introduced.The application of the position sensor to output the pulse signal helped realize the indirect measurement and control of linear pobition.The high performance AT89C51 micro-controller was designed as the core control unit.The adoption of the hardware and the software dual limitative position protection enhances the reliability of the linear motion system.The test shows that the method of position and speed dual-closed loop control is feasible in aviation electric lock system based on BLDCM.