UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CONN
Analytical procedures for establishing microprocessor requirements for multivariable feedback control of linear stochastic dynamic systems were developed and evaluated. Key issues in microprocessor implementation of modern estimation and control logic include 1 accuracy, 2 computational capability including arithmetic as well as interface speed, and 3 memory requirements. Compatibility of current microprocessor technology with the established implementation requirements was assessed. The analytical method to establish microprocessor accuracy requirements for closed-loop digital control of linear stochastic systems is based upon defining a quadratic performance index that provides a quantitative measure of performance degradation. This method is employed to determine closed-loop system time response sensitivity to 1 microprocessor word length and 2 system structure standard, Jordan canonical or companion forms within the control logic. The developed procedures were evaluated and illustrated by application to 1 a second-order system and 2 a linearized fifth-order F100 turbofan engine model. Results were verified using a digital simulation of a continuous systemmicroprocessor controller. Microprocessors considered were the Intel 8080 microprocessor an 8 bit microprocessor and the Digital Equipment Corporation DEC LSI 112 microprocessor a 16 bit microprocessor.
Final rept. 1 Feb 78-31 Jan 79,
Presented at the Society of Automotive Engineers Aerospace Control and Guidance Systems Committee Meeting, 28 Sep 78, Cambridge, MA.