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Development of a Windows NT real-time operating system for NC machine control
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rhee, Sokwoo |
| Copyright Year | 1997 |
| Abstract | A Windows NT real-time operating system for controlling multi-axis servo drives is presented in this thesis. It is guaranteed that the system can access I/0 devices within a fixed latency, i.e. 6 jls on a Pentium Pro 200MHz PC. While performing real-time motion control, the computer can access disk drives and perform GUI (Graphic User Interface) operation. To guarantee real-time operation, most time-critical computations and I/O operations are embedded in the kernel of the Windows operating system as a device driver, and processed at the level of Interrupt Service Routine. This real-time operating system allows us to eliminate the need for a dedicated coprocessor hardware board, often termed a Motion Control Card, that is designed to off-load the burden of real-time computation. First the interrupt procedure in the Windows NT operating system is briefly described, and a way for guaranteeing real-time operations is presented. The time budget for interrupt services, data input and output, and control computations is analyzed. Based on the proposed interrupt handling technique and time budget analysis, a multi-axis AC servo motor control system is designed, built and tested. Not only velocity and position feedback but also current feedback, commutation, and PWM computations for multiple axes are performed all by software with a sampling interval of 100 ps. Experiments demonstrate that performing the real-time control does not significantly slow down the system in accessing disk drives and performing GUI operation. In addition, concept of networkbased distributed control system was introduced and diskless PC based controller was examined as an promising component of the distributed system. Thesis Supervisor: Haruhiko H. Asada Title : Professor of Mechanical Engineering To My Parents and Lovely Sister... |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://dspace.mit.edu/bitstream/handle/1721.1/45474/37149193-MIT.pdf;jsessionid=756D23B0DE90150FD017712B1FC11FC3?sequence=2 |
| Alternate Webpage(s) | http://dspace.mit.edu/bitstream/handle/1721.1/45474/37149193-MIT.pdf?sequence=2 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
