Please see:
[1] S. M. H. Sadati et al., ‘Stiffness Imaging With a Continuum Appendage: Real-Time Shape and Tip Force Estimation From Base Load Readings’, IEEE Robotics and Automation Letters, vol. 5, no. 2, pp. 2824–2831, Apr. 2020, doi: 10.1109/LRA.2020.2972790.
https://bit.ly/37DEpWN