Optimal Design and Implementation of a Fast Start Scheme for a High Real-Time Embedded Electromechanical Control System

Abstract

The purpose is to shorten the start-up time of high real-time embedded electromechanical control system, so as to improve the system performance. Based on the theory of software composition and start-up process of high real-time embedded electromechanical control system, in the research of bootloader stage of embedded electromechanical control system, the advantages and disadvantages of two start-up schemes based on NOR flash and NAND (Not AND) flash are analysed. The optimization design of system quick start scheme based on NOR flash is proposed, including the modular design of embedded Linux kernel and the implementation of hybrid file system based on compressed ROM filesystem (CRAMFS) and Yet Another Flash File System (YAFFS2). Finally, the control of the refrigerator in the cooling control system is taken as an example to carry out the simulation experiment. The results show that compared with before optimization, after the optimization of the system quick start scheme, the system in stage 1 is shortened by 2.11s, the stage 2 is shortened by 6.22s, and the total time of the whole starting process is shortened by 6.33s; the theoretical speed of the motor increases from 0 to 1560, while the actual output speed increases from 0 to 1655; the error of the actual output relative to the theoretical speed is small (about 1%), the range of real-time frequency change is [0, 25.2] and the value is in the ideal range. This shows that the optimization design effect of the fast start scheme is ideal, and the scheme can make the motor performance of the system in a stable operation state.