Perfect security system, Using flexible Role-Based Access Control model to build flexible Role-Based Access Control system.
完善的安全体系，采用灵活的基于角色的访问控制模型，实现灵活的访问控制体系。
This paper analyzes the characteristics of Spacecraft Fault Diagnosis System and the basic idea and principle of Role-Based Access Control model.
文章介绍了基于角色的权限管理模型的基本思想及工作原理，并分析了航天器故障诊断系统中权限管理的特征。
Role is introduced to separate user and privilege in role-based access control model, but RBAC can't directly control the permission for a sequence of events.
而基于角色的访问控制模型以角色为中介，将用户与权限逻辑隔离，但该模型不能处理有执行顺序的任务；
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