Adaptive Feed Rate Control of Small Combine Harvester (III)

Analysis of Control System and Simulation

Abstract

In the part I, the digital sampled-data adaptive control system which can control the traveling speed and the feed rate setting values by the logical operation was investigated. In the part II, it as reported that the good results were obtained from the field experiments. This control system involving many linear and non-linear elements, digital sampler, and 0-order hold in its its controlling loop, can be considered as a multi-inputs and multi-outputs control system with the logical operation. So the analysis of system must be done as a non-linear sampled-data control system. In this paper, the analysis of controling characteristics was done by use of a digital simulation.
The results obtained from the simulation were satisfactorily agreed with the field experiment at ones. Because the initial setting values of feed rate and its dead zone width were set lower and narrower respectively, and the rate of traveling speed change was set at about 0.026m/s₂, it was found from the results of simulation that each phenomena was put into a steady state quickly and the good controlling results were obtained.