CONSTANT-SPEED CONTROL AND POSITIONING CONTROL METHOD FOR EXTREMELY HIGHLY STABLE ROTARY SYSTEM ADOPTING ATOMIC FREQUENCY STANDARD FOR REFERENCE OSCILLATOR FOR MACHINE CONTROL

摘要

PPROBLEM TO BE SOLVED: To provide a method used for data recording and reproduction concerned with a digital recording and reproducing device using a mechanical rotary system which can reduce jitter generation and improve synchronism precision, contribute to minimization of residual errors generated even when a code error correction technology is used, and improve recording and reproducing process capability. PSOLUTION: Constant-speed control or positioning control over the rotary system of the machine is performed by using an atomic clock or atomic frequency standard 1 using rubidium for the reference oscillator for the machine, and signal processing of a control system is performed on an analog or digital basis. A system and a device for digital recording and reproduction can be realized which reduce the jitter generation and improve the synchronism precision in digital data recording and reproduction using the mechanical rotary system, contribute to minimization of residual errors generated even when using the code error correcting technology, have high quality, and greatly improve the recording and reproduction capability by using superior characteristic frequency stability and frequency accuracy that the atomic clock or atomic standard of frequency using rubidium, cesium, hydrogen, or mercury has. PCOPYRIGHT: (C)2004,JPO