| 摘要 |
A system and method for instantaneously determining the absolute position of a linear or rotary actuator. A code plate having a series of digital words thereon is associated with the linear or rotary actuator. A magnetic or optical code plate is utilized, each code plate provided with N tracks. M signal levels are associated with each point on every track. The use of M-ary signal levels would enable the instantaneous determination of the position of the code plate when power is supplied to the system.
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