직접제어 방식을 적용한 소형 지게차 변속 시뮬레이션에 관한 연구

The transmission control method of small forklift is classified into pilot control method and direct control method. In pilot control method, the hydraulic circuit which consists a lot of components is very complex so the production process is too costly and time consuming. The direct control method contains fewer components that can be configured to simple hydraulic circuit. It has more advantages because the shift sensitivity of transmission is changed easily via the input profile. Therefore, the study of the characteristics of direct control method is demanded to applied the development of hydraulic system design. This paper will present the simulation of direct control transmission by using AMESim. At first, the modeling of direct control method is obtained and simulated with the real parameters. Second, the simulation results are carried out and compare with the experiment result to verify and analysis the characteristic of the direct control method.