| Summary: | 碩士 === 國立中央大學 === 光機電工程研究所 === 96 === The main purpose of this thesis is to calculate real power
on AC servo motor of treadmill. The real power can express
human gait on treadmill to PC base. The main core of measurable
system is DSP MCU, and measure three phase current、voltage
of AC servo motor. After measurement ,we use external torque
sensor to be opposite with real power. Using torque sensor
measurable system and PC, we can establish measurable platform
for human gait.
Under mapping out mechanical hardware, electrical
hardware and firmware, the system measures voltages、
currents、torque and rotate speed from AC servo motor and save
them as digital data to memory in DSP MCU. After measurement,
the data was calculated through FIR filter, we can obtain three
power. Through System identification, we can decouple real
power and react power. Besides, we can obtain torque from
external torque sensor、rotate speed from encoder.By the two
parameters can obtain mechanical power. Finally, using
statistical signal process method we compare torque and real
power. After that, we realize torque and real power have
directly correlation.
When we realized data have directly correlation, we can
replace real power with torque to express human gait. Thus we
IV
can measure human running gait use real power.
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