章动研究简评

A Brief Review of Research on Nutation

对各种章动理论所采用的方法（天体力学的方法、地球物理方法和实测的经验方法）和章动序列进行了简要介绍，对近年来有关的理论研究和观测的进展，特别是自由核章动，进行了评述，并指出其中存在的一些问题．

Various methods on the Earth nutaion theory, including celestial mechanics method, geophysical method and observational method, and nutation series are discussed. The recent development of observation and research work, especially of free core nutation, are introduced. Moreover,some deficiencies of the work and the prospect of the future developments are also pointed out.