1. [2] R. A. Cooper, T. A. Corfman, S. G. Fitzgerald, M. L. Boninger, D. M. Spaeth, W. Ammer and J. Arva: Performance assessment of a pushrim-activated power-assisted wheelchair control system; IEEE Trans. on Control Systems Technology, Vol. 10, No. 1, pp. 121-126 (2002)
2. [8] Y. Takahashi, S. Ogawa and S. Machida: Front wheel raising and inverse pendulum control of power assist wheel chair robot; Proc. Annu. Conf. IEEE Ind. Electron. Soc., pp. 668-673 (1999)
3. [10] Y. Oonishi, S. Oh and Y. Hori: A new control method for power-assisted wheelchair based on the surface myoelectric signal; IEEE Trans. on Industrial Electronics, Vol. 57, No. 9, pp. 3191-3196 (2010)
4. [11] S. Oh, N. Hata and Y. Hori: Integrated motion control of a wheelchair in the longitudinal, lateral, and pitch directions; IEEE Trans. on Industrial Electronics, Vol. 55, No. 4, pp. 1855-1862 (2008)
5. [12] S. Oh and Y. Hori: Disturbance attenuation control for power-assist wheelchair operation on slopes; IEEE Trans. on Control Systems Technology, Vol. 22, No. 3, pp. 828-837 (2014)