English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Many engineering devices need a platform with high level and position accuracy. An automatic control system is proposed to adjust a small platform that is supported by four height-adjustable legs and two length-adjustable level screws. The control system scheme and working principle are analyzed, then the structure of the control system based on PLC is put forward and the hardware is designed. And then the direction decoupling control strategy is put forward and software of the control system is designed in detail. The device can adjust the levelness and position of the platform quickly, with the man-machine interface of electronic touch screen for status display and parameter setting, the functions of virtual leg detection and limit protection. INTRODUCTION Many devices need a level platform, for example vehicle-borne radar, static pile pressing machine and artillery launcher. For these devices, the level error of the platform must be adjusted before them are utilized normally [1]. In recent years, there have been many kinds of leveling methods for this platform including three points supported leveling, four points supported leveling and six points supported leveling. These leveling methods can be divided into two categories, namely, manual adjustment and automatic adjustment. According to the actuator, the automatic adjustment methods have two types, including the mechatronics and hydraulics [2]. At present, all kinds of leveling devices are mainly designed for large and medium-sized equipment. On the other hand, for some small equipment, such as measuring instrument platform, the installation of power equipment platform with a variety of flexible and small load equipment, have no proper and low cost scheme for automatically leveling. In addition, some equipment need to adjust the levelness and horizontal position of platform at the same time, the current processing methods is to adjust the levelness automatically while adjust horizontal position manually. Due to being unable to realize full automation control, the adjustment is time-consuming and the control precision is not high. For the leveling of small equipments, considering the small load, the hydraulic leveling device is unfavorable, and using the adjustment of electromechanical has short leveling time, high precision leveling and reliability, etc. This work of this paper is to design a kind of small platform electromechanical automatic adjustment device using PLC as control core . The device is mainly applied to power equipment of smaller load or some small devices with the higher levelness requirements, which have some advantages, such as small sizes , flexible structure and high precision. 219 2016 International Conference on Engineering and Advanced Technology (ICEAT-16) Advances in Engineering Research (AER), volume 82

Research on an Automatic Adjustment Control System for Small Platform Based on the PLC