Methods and means for control of error in precision instruments and systems
The rapid and precise response of analog measurement and actuating systems has become the limiting factor in instrumentation since the availability and use of computer-derived commands. The existence of thousands of analog devices with slow time response and dynamical errors in response gives rise to the need for simple programming methods to improve their performance. This report is for experimenters and practicing engineers who must, because of budget and/or time limitations, push their present system's performance to the limit. It can also aid in the design of new systems. The method described consists of reducing a system's response characteristics to those of an elementary system, F/sub 0/(s), and applying appropriate programming for positive control. With simple techniques, an order-of-magnitude improvement in response time and accuracy is, in many cases, achievable. Microprocessor or minicomputer control is possible and can be used to achieve fully adaptive systems having superior control characteristics. The performance of noise-limited systems can also be dramatically improved. In addition, complex, time-varying systems can be computer-controlled by sequential programming, so as to be fully adaptive to changing conditions. With additional effort, the method may prove valuable in potentially dangerous systems checkout situations. For example, when faced with control problems during flight testing of a complex aircraft, application of the method may provide a degree of control beyond that normally available, such that safe landing of the experimental aircraft is possible.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6648641
- Report Number(s):
- ANL-78-14; TRN: 78-018883
- Country of Publication:
- United States
- Language:
- English
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