The pid parameters adjustment methods are studied for single loop - control sy stems ^ cascade control systems , feed forward back forward control systems and 2 * 2 multivariable control systems according to the character of thermal processes control . the optimal adjustment strategy of using simple shape algorithm to search the optimal pid parameters with the initial pid parameter values obtained by related adjustment methods is proposed . the optimal adjustment soft is developed also 针对热工过程的特点，研究了单回路控制系统、串级控制系统、前馈-反馈控制系统和2 2多变量控制系统的pid参数整定方法，并在此基础上提出了以上述各系统的pid参数整定值作为初始参数值，采用单纯形算法对pid参数进行寻优的pid参数优化整定方案，并开发了相应的pid参数优化整定软件。
