The identification methods of transfer function are studied for three kinds of typical thermal processes . the related identification soft is developed . simulations are carried out to show that the developed soft is valid 研究了有自平衡能力、无自平衡能力和稳态为零的三类典型的热工过程的传递函数模型的求取方法，并在此基础上开发了相应的应用软件。
