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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: In view of the problem that the contact force between the moving and stationary scroll disks was difficult to control in the process of the side sealing of the scroll turbine, combined with the characteristics of the circular translation of the moving scroll disk and through the analysis of the contact force model of the scroll disk, the motion control method of the moving scroll disk based on the normal-tangential coordinate system and the active compliance control method was proposed. Firstly, the principle of classical compliance control was introduced, and the shortcomings of classical compliance control method in XY rectangular coordinate system were analyzed. Then, the concept of normal-tangent coordinate system was proposed. By deducing the relationship between the motion variables based on the normal-tangential coordinate system, the overall design of the motion control system of the moving scroll plate was made. Finally, the contact force model and control model of the scroll machine under MATLAB/Simulink software were built to verify the feasibility of the above methods. The actual contact force curve occurred when the translational speed of the moving scroll disk was unchanged but the contact force setting value changed, and the actual contact force curve occurred when the contact force setting value was unchanged but the translational speed of the moving scroll disk changed, were obtained respectively from the research. The research results show that the tracking error between the actual value of the contact force and the set value is within 2%,after changing the set value of the contact force, the actual value of the contact force can be tracked to the new set value within about 0.3 s. When the translational speed of the moving vortex disk suddenly changes, the actual value of the contact force can return to the original equilibrium state in about 0.2 s. It is shown that the active compliance control method based on the normal tangential coordinate system can effectively control the contact force during the translation process of the vortex disk.
Key words: positive displacement compressor; scroll compressor; scroll disk working space; scroll disk contact force model; active compliance control; coordinate transformation
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