The curve parameters must satisfy Yo- Yn=2r
(r - s). The area under the curve is A = (Yo+Yn)
t:/2. If the required area is bigger or much smaller
than A, two curves may be combined, denoted by
Ye(t) in Fig. 3(b). If the required area is moderately
smaller than A, delayed smooth curve, Yd
(t) shown in Fig. 3 (c) can be adopted as a
desired state trajectory.