Abstract:

In order to apply the method of system identification of engineering cybernetics a mathematical model of MC field along lumber thickness changing with the passage of time during the period of 100℃ test was established and its solution was deduced in this paper. The dynamic function relationship among initialMC, drying time, instantaneous MC, and corresponding diffusion coefficient could be shown by this solution. Taking advantage of this the diffusion coefficients of different kinds of wood under different levels of MC in this condition could be obtained by experiments ,and they should be important data of making drying schedules for the target wood. A new train of thought was offered by this study.

Key words: test method, System identification, Moisture content (MC), Diffusion coefficient, Drying schedule