Forklift Motor Performance Computer Testing System Research And Application

With the industrialization of social production and the improvement of people's quality of life, more and more attention is paid to energy economizing and environmental protection. Because of their features of no pollution, low noises and operating cost, energy economizing and convenience of maintenance, the electrically driven vehicles (including forklift) gradually win the favor of the market.Combined with the research project named "the computer test system of forklift electrical machinery's comprehensive performance", this thesis researches on the following subjects:1. The operating principle of the forklift electrical machinery is analyzed, and the laws of its practical operation are mastered.2. Communication of the Industrial Control Computer (IPC) and the Programmable Logical Controller (PLC) is realized. Dynamic modulation of the IPC to large power supply and load is realized and the control performance has reached a high level. Moreover, in the process of adjusting, the electromagnetic compatibility of the system* the anti-jamming of the hardware and software and the parameter calibration of the Fuzzy PID Controller are paid attention to. Various targets of the system designed have been reached.3.The software possesses of friendly interface and strong ability of human-computer interaction. The main menu includes five functional modules: "performance testing", "parameter setting", "coefficient proofreading", "data inquiring" and "system help", which can complete various tasks.From the viewpoint of research and innovation, this thesis has the following characteristics:l.A new method梩est different moments in different positions is proposed. The position of the load is switched automatically according to the order released by computer, and the automatic orientation is ensured, so this system is suitable for testing of various breeds.2.The sectionalized linear regression method is introduced for the precision proofreading of sensor, which makes up for sensor's nonlinearity and promotes its practical precision.3.1n the process of designing and debugging the supply, multi-wave and T-wave RC filters are used to solve its problems of ripple well.4.In order to suit various breeds and promote the robustness of the system, the Fuzzy PID control is introduced based on common digital PID. This can not only improve the control performance, but also make the theories and methods in the front line of control science be validated and applied in the control of forklift electrical machinery.This project roots in practice and is also applied to practice. With ten-month research, all the tasks of the project are completed and accepted by the user. "The computer test system of forkliftelectrical machinery's comprehensive performance" can substitute foreign products of the same kind, and its costs are much lower than foreign equipment. Therefore, it has spreading value in domestic market.