At present, the nc machine tool has been basically complete, the specification is various, according to incomplete statistics for more than 400 varieties specifications. Can be classified according to various principles. But taken together, common are classified with reference to the following four methods.
This paper introduces the composition and working principle of magnetic suspension spindle system, and puts forward a new type of intelligent PID controller based on conventional PID digital controller design. Its core component is 6202 Bearing From GHK http://www.ghk-bearings.com/SKF-6202-Deep-Groove-Ball-Bearing-13.html TMS320LF2407A, design the hardware overall diagram of five degree of freedom magnetic suspension spindle system. With C2000 as a development platform, based on conventional PID intelligent PID controller is designed. Theoretical analysis results show that this intelligent PID controller can achieve better control effect, higher control accuracy requirement. Numerical control technology application of magnetic bearing
Active magnetic suspension bearing (AMB, hereinafter referred to as magnetic bearing) is the collection of many subjects in a body, most can reflect the mechanical and electrical integration products. Magnetic suspension bearing compared with the traditional bearing has the following advantages: no contact, no friction, high speed and high precision. Traditional bearing after a long time, serious wear and tear, and must be replaced, for oil lubrication bearing prolongs service life, but inevitably there will be a long period of time the spill, the impact on the environment, this point of magnetic suspension bearing can be avoided, it is a kind of environmentally friendly products. Magnetic bearing and research significance not only, still has the very broad application space: aerospace, transportation, medical treatment, mechanical processing, etc. Abroad has a lot of application examples. Numerical control technology application of magnetic bearing
Magnetic suspension bearing system is consists of the following five parts: controller, rotor, magnet, sensors and power amplifier. One of the most critical part is the controller. The performance of the controller is basically determine the performance of the magnetic suspension bearing system. Controller control law determines the dynamic performance of magnetic bearing system and the stiffness, damping and stability. The controller is divided into two types: analog controller and digital controller. Although domestic currently widely used analog controller while satisfy the stability of the system to a certain extent, but compared with analog controller and digital controller has the following defects: (1) regulation is not convenient, (2) is difficult to realize the complex control, (3) can't realize the control of two or more than two degrees of freedom, and (4) poor interchangeability, namely different magnetic suspension bearing must have the corresponding controller, (5) large power consumption, large volume, etc. Magnetic bearing is widely used, the simulation of the controller online has to be said to be one of the reasons regulation performance is poor, therefore, digital direction is the development trend of magnetic bearings. At the same time, to implement the intelligent of the magnetic bearing system, and obviously simulation controller is difficult to meet the requirements. So from raising the magnetic bearing performance, reliability, enhance the flexibility and reducing the volume of the controller, power consumption and the perspective of the network, intelligent direction development, must implement the digital controller. Numerical control technology application of magnetic bearing
Nearly 30 years to get rapid development and wide application of control theory. Controller of magnetic levitating bearing control law research has made significant progress in recent years, the foreign involved in the control law are: conventional PID and PD control, adaptive control and h-infinity control and so on, the control law is mainly involved in domestic conventional PID and PD control and h-infinity control, but the h-infinity control successfully applied in the related information in the magnetic suspension bearing system has not been reported. Numerical control technology application of magnetic bearing
From the point of the current development situation at home and abroad, foreign leading domestic research status, and transition ways for many years. Abroad have special magnetic suspension bearing company and maglev research center in the development and application of this work, such as SKF, NASA. Of SKF controller of magnetic bearing control law used for adaptive control, the product applicable scope: bearing capacity of 50 ~ 2500 n, rotating speed of 1800 ~ 100000 r/min, working temperature below 220 ℃. NASA is the U.S. space agency, they develop maglev research for decades, is mainly used in aerospace, research areas include rocket engine and maglev rail propulsion system (September 2002 has been completed on the maglev rail and can make the initial launch of a rocket under 2 g acceleration speed up to 643 ~ 965 km/h. The current domestic haven't a magnetic suspension bearing company, to catch up with the level of magnetic suspension bearing development abroad, must increase investment in manpower and material resources, etc. Numerical control technology application of magnetic bearing
Domestic research on controller of magnetic levitating bearing control law started relatively late, the current is used conventional PID and PD control, the actual circuit also has the use of PIDD. Relatively speaking is not very high control precision, and every system must correspond to the corresponding KP, KI, KD, a great trouble to adjust, the user will also feel very inconvenient. In order to make the magnetic suspension bearing production, must solve the above problems, anyone can very convenient to use, must do it imaging fool type equipment the same product, it must first solve the problem of the controller. To solve this problem is to make intelligent controller. The content of the intelligent including hardware and software of intelligent intelligent. Numerical control technology application of magnetic bearing