以气压为受控量的系统为滞后时间变化的非线性系统 ,很难建立准确的数学模型及确定最优解。根据控制要求 ,给出了基于知识 /推理规则的智能分级控制方案 ,即在获取的知识库引导下 ,逐级分配系统性能参数 ,以实现切实可行的控制方案和操作。基于智能的气压分级控制系统具有运行稳定、控制灵活、调节方便的特点 It is difficult to establish an accurate mathematical model and determine the optimal solution because the system with controlled atmospheric pressure is a nonlinear system with lag time variation. According to the control requirements, an intelligent hierarchical control scheme based on knowledge / reasoning rules is given, that is, under the guidance of the acquired knowledge base, system performance parameters are allocated step by step so as to realize practical control schemes and operations. Based on intelligent pressure grading control system with stable operation, flexible control, easy adjustment features