| AMT is widely known as the Automated Mechanical Transmission. AMT′s core technology is the computer controlled. The performance and operation quality is directly determined by electronic technology and quality. The superiority of automatism shift gears technology, that is, easy driver, passenger comfort, and the low rate of vehicle malfunction .And it also administers to advance vehicle security. In the system of manual shift gears, these problems resulted from the driverˊs experience and proficiency in the skill, but it is controlled by criteria of AMT ECU in the AMT system.Certification and testing equipment, simulation and test AMT TCU have to deal with the engine and other vehicle sensor signals, which are used for the AMT TCU software debugging and hardware testing.AMT TCU processing signals, including nine analog sensor input, two hall sensor input, three PWM drive motor, four switch output, thirteen switch input, Also in line with the ISO9141 K-Line connect port, two CAN connect port in line with the ISO11898.Testing and certification system compose of the test equipment, PC for display and control, the part of load and power module. Test equipment to provide analog output signal, the frequency output signal, switches output signal, relay simulation of load, electrical simulation of the load, CAN bus communication and power. Analog output signal, switch output signal, the frequency output signal is supplied by the test equipment in the Test system, provide for the TCU, as the input signal of TCU; Electromagnetism valve simulated load, relay simulation load, electrical load, etc. simulation TCU output signal load in the test system; between test equipment and TCU exchange data through the CAN bus, TCU running can be clearly measured by the computer which is real-time monitoring of the TCU and determine in accordance with criteria whether or not to pass the test, and export test records. Power supply unit change the alternating current into DC power supply for the test equipment.In hardware design, the PIC30F and STM32 identified as the core chip of the control box for the input and output channels of the signal design and the adoption of the relevant circuit debugging. PIC30F selected as the master control board because the chip has two CAN - bus that can be achieved communication with the TCU and the STM32 chip at the same time. In software programming, the United States I - Logix's Rhapsody 7.0 was used . It is based on the UML model of the development of methods, from the design model directly generate to high-quality code, will be shifted the focus of development to the design from the coding table, the automated method of software development team to promote effective cooperation, not only improve the software reuse and code quality, and shorten the overall development time. There are two parts software packages and hardware package in the design software. Hardware package for the control of hardware, software package is the logic of the whole system functions. Software package call the hardware function of the single-chip hardware to achieve control through the nested hardware package, and through the news or event-driven communication between the completion of hardware and software. This design that software package and hardware package combines has enabled us to update the products and the latter is more convenient to maintain, when the need to replace hardware the hardware only the contents of packages can be altered, the package of the whole system logic function can not change as much as possible to shorten the software development cycle.AMT TCU past, debugging is in the vehicle, the equipment to make the AMT TCU testing more convenient. Simulation of the simulation load using MATLAB is an improvement in the system. This will save a lot of resources. |
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