Firstly, the scale transformation of Lorenz chaotic system is carried out in this paper .This is because in practical applications , the numerical solutions of some chaotic systems are not able to be implemen-ted by the usual electronic components , and the ranges of these variables need to be adjusted by scaling trans-formation to meet the requirements of circuit design .Then, the chaotic synchronization of Lorenz chaotic sys-tem after scale transformation is realized respectively by using the active control method , adaptive control method and control method based on state observer .It can be applied to the specific circuit experiments and has high practical value .Theoretical analysis and simulation results illustrate the feasibility and effectiveness of these proposed synchronization methods .%首先对Lorenz混沌系统进行标度变换,这是因为在实际应用中,一些混沌系统的数值解是不能使用普通的电子元器件来实现的,往往需要利用标度变换的方式将这些变量的变化范围进行适当调整,使其符合电路设计的要求.然后,采用主动控制法、自适应控制法和基于状态观测器的控制法分别实现标度变换的Lorenz混沌系统的同步,3种方法均可应用于具体的电路实验,具有较高的实用价值.理论分析和仿真结果均表明这些同步方法是有效和可行的.
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