Closing the loop with inexpensive microcontrollers

Author

Jackson, A.

Author_Institution

Motorola Inc., Phoenix, AZ, USA

fYear

1992

fDate

2-7 Feb. 1992

Firstpage

67

Lastpage

76

Abstract

The feasibility of using a commercially available microcontrollers for time-critical applications that require response times on the order of tens-of-milliseconds is addressed. A common type of positioning system with a desired response time of 60 milliseconds is analyzed with respect to the requirements imposed upon the microcontroller. Various means of digital compensation are compared, and it is shown that a simple control law can be very effective. The resulting difference equation is implemented on the Motorola MC68HC16 microcontroller in order to obtain system timing. The results of the study indicate that the newer generation of microcontrollers can be effectively used for all but the most demanding of control tasks.<>

Keywords

aerospace computer control; closed loop systems; compensation; microcontrollers; position control; 60 mus; Motorola MC68HC16; digital compensation; feasibility; microcontrollers; positioning; response times; time-critical applications; timing; zeros and poles; Aerodynamics; Aerospace industry; Control systems; DC motors; Delay; Difference equations; Microcontrollers; Microprocessors; Open loop systems; Time factors;

fLanguage

English

Publisher

ieee

Conference_Titel

Aerospace Applications Conference, 1992. Digest., 1992 IEEE

Conference_Location

Snowmass, CO, USA

Print_ISBN

0-7803-0225-7

Type

conf

DOI

10.1109/AERO.1992.200376

Filename

200376