https://scholar.hit.edu.cn/en/publications/%E5%85%B3%E4%BA%8E%E9%9D%9E%E7%BA%BF%E6%80%A7%E7%B3%BB%E7%BB%9F%E8%BE%A8%E8%AF%86%E7%9A%84%E6%81%A2%E5%A4%8D%E5%8A%9B%E6%9B%B2%E9%9D%A2%E6%B3%95%E5%92%8C%E5%B8%8C%E5%B0%94%E4%BC%AF%E7%89%B9%E5%8F%98%E6%8D%A2%E6%B3%95/
Restoring force surface method and Hilbert transform one for nonlinear system identification -...
restoring force