A method for calculation of actual relative humidity of heated twin radiosonde capacitive humidity sensor without inference of heater is analyzed and constructed based on relationship between relative humidity

temperature

dew point and saturation vapor pressure before and after heating.Fuzzy RBF neural network PID control method is used to control the heater

avoiding of complicated manual PID parameters tuning process.Matlab simulation results indicate that

compared with traditional PID controller using Niegler-Nichols empirical formula

the fuzzy RBFPID controller has better stability and faster response speed

its step response overshoots are 15.1 %

4.3 % respectively

settling times under permissible error of 2 % are 7.12

3.8s respectively.