Conditional Lyapunov Exponents in Hyperchaos Sporadic Driving Synchronization

A handy solving method of calculating the conditional Lyapunov exponents is put forward. The method has been successfully used in continuous driving and sporadic driving synchronization. The technique of hyperchaos synchronization using sporadic driving is analyzed by the method. This is demonstrated by Rossler hyperchaotic system. Then from the conditional Lyapunov exponents of the system versus time interval of pulse signal, the best interval in sporadic (or pulse) synchronization can be determined. So our method is very useful in application.