1·The purpose of this paper is to find out an approach of inverse eigenvalue problems of undamped mass-spring system by using an attached lump of known mass.
本文探讨了用附加已知质量的方法求解无阻尼质量弹簧系统的逆特征值问题的可能性。
2·Undamped input filter may cause converter system unstable or oscillation.