Partitioned Quasi-Newton Approximation for Direct Collocation Methods and Its Application to the Fuel-Optimal Control of a Diesel Engine

Table 1

Effect of the initialisation of the Hessian approximation on the number of NLP iterations until convergence, test case (a).

Method	𝛽=0.01	𝛽=0.05	𝛽=0.1
Full BFGS	36	28	38
Partitioned BFGS	22	20	21