But during this interim , there are so many old analog systems still working in companies and governments . it is impossible to establish a new digital network system instead of using the old one , for it is not practical and will cause a large waste of resource 然而,现阶段仍然处在从模拟系统到数字系统过渡的阶段,在众多的企事业单位和政府部门中,还有大量的模拟系统在运行,把他们全部推倒,重新建设全新的数字化网络化系统显然是不现实和不可取的,将造成固有资源的巨大浪费。
The main purpose of this paper is to research on the diagnosis of the analog circuit with tolerance based on parameter identification , it try to find a novel method of the fault diagnosis of the analog system . in this paper , a procedure for the multifrequency fault diagnosis of analog circuits is presented . generally speaking , for the diagnosis equations are nonlinear , it ’ s very difficult to solve them with high precision 本文的研究重点在于具有容差模拟电路故障诊断的参数识别方法,探索解决模拟电路故障诊断问题的新途径,介绍了由电路结构来提取故障诊断方程的多频支路和多频节点方法,由于故障诊断方程一般情况下是非线性的,因此,传统的非线性方程求解方法存在精度不高,计算困难的缺点。
With the develop of computer techniques , the digital autopilot system has replaced the analog system . the analog system has not been able to adapt the developmental desire of modem autopilot system function . the digital autopilot system , of which the computre is main part , has put up tremendous superiority in aspect of flight control system 随着计算机技术的发展,数字式飞行控制系统逐步代替了模拟式系统。模拟式系统已不能适应现代飞控系统功能发展的要求,而以计算机为主的数字式系统却在飞行控制方面表现出其巨大的优越性。