Cross Loading Motor Force Control System Design and Realization

Abstract

Cross loading equipment is one of the important test equipments in airplane, aviation and shipping field. It is used to test the performance of rudder used in airplane, ship and missile etc in laboratory. A cross loading equipment based torque motor was processed. This paper gives the design process which includes mechanical hardware design, control system design and software development. In order to shorten development cycle and reduce program error used C/C++, RCP technology based Matlab/Simulink was used. Experiments shows us the cross loading system can realize the designed performance. Introduction Rudder loading simulation system is the important equipment which was used in industry, university and research institution to act force to rudder to test and verify the performance. Load simulation has two methods: hydraulic-driven and electric-driven. Hydraulic-driven simulation system was always used in the large torque and high dynamic response field with the disadvantage of design complex, large volume and large inertia, Electric-driven simulation system was always used in lower torque and low dynamic response field. According to the need of project, a kind of rudder motor load simulation system is designed based on high-powered single chip microcomputer and moment motor. Math model of electric load and surplus torque influence factor were given, position forecast control strategy was present to solve surplus torque. This paper shows you the whole development of cross loading simulator including mechanical design, control system design and software design. In order to reduce program error with traditional program language such as C/C++ and shorten the development cycle, Rapid Control Prototyping (RCP) technology based Matlab/Simulink was used. Part experiments have been finished which shows the high performance. Mechanical Design Mechanical structure is the important component in cross loading equipment. Fig.1 is the components of cross loading equipment. Loading assembly are composed of a torque motor which was used to act torque, erection support which was used to fix motor and shaft coupling which was used to connect rudder and torque motor. Transition assembly was fixed on the lampstand which can move forward or back along the moving track through turn hand wheel clockwise or anticlockwise to suit the different size rudder. Base assembly have two functions, one was used to install fixture which can fasten the rudder to the requirement position to test, the other it provides a platform which person can adjust the rudder position easily and change the parts inside rudder. All the mechanical structure was designed by CAXA software, which can process interface between parts directly. In the design process, according to the requirement, all kinds of form can be design. When the interface appears, designer can adjust the position and size easily to solve the problem. The other, the design result can shows us “what you see is what you get” which will help the consumer to judge the design whether satisfy the requirement. International Industrial Informatics and Computer Engineering Conference (IIICEC 2015) © 2015. The authors Published by Atlantis Press 1935 Fig.1 Mechanical Components of Cross Loading Control System Design Control system is the core of the cross loading simulator, it is composed of control system hardware and control software. With the rapid development of computer technology, digital control technology was used in control system widely. Considering the control precision and real-time performance, host-target communication method was used, host based PC was used to set control instruct and monitor the status of cross loading simulator, Target based X86 have two functions, one is used to realize the real-time data acquisition including A/D, D/A and I/O, the other is to finish the real-time resolving of control system model. Fig.2 is the hardware components of the control system. Fig.2 Hardware components of control system Host computer is the computer with XP operation system which provides a friendly human-machine interactive interface with Labview GUI program language. Target computer is X86 computer based XPC-target with Real-time kernel. Ethernet is the main interactive method