Fuzzy-Pi Control Applied To Thermal Control System in Manned Spacecraft School of Aviation Science and Engineering, Beihang University, Beijing, P.R. China

Format:

Conference/Event

Author/Creator:

Li-ping, Pang, author.

Conference Name:

International Conference On Environmental Systems (2004-07-19 : Colorado Springs, Colorado, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2004

Summary:

The temperature control and check valve (TCCV) in a condensing heat exchanger (CHX) controls the amount of atmosphere that flows through or around the CHX depending on the amount of cooling required. This paper presents a new control scheme based on a Fuzzy-PI algorithm to control the CHX. It is realized by the application of Fuzzy-PI controller to the TCCV. The algorithm uses instantaneous and longer-term changes in measured temperature to continually adjust the TCCV position and maintain the atmospheric temperature within specified limits. There is a control threshold switching between PI and Fuzzy control. When the absolute error is higher than the threshold fuzzy control is used, otherwise PI control is used. Simulation is conducted, whose results show that the proposed control scheme makes it possible to improve temperature stability and control precision

Notes:

Vendor supplied data

Publisher Number:

2004-01-2502

Access Restriction:

Restricted for use by site license