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Sensor (Transducer)
Actuator
Physical Property (may be high
power density)
Signal Conditioning
Power Amplification
Mechanical Work
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H W G
VS VW
Active Axis
Pass
ive
Axi
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0 ≤ 𝑥 ≤ 1
𝑅2 = 𝑥𝑅𝑃 𝑅1 = 1 − 𝑥 𝑅𝑃 𝑅𝑃 = 𝑅1 + 𝑅2
VS Vout
𝑅𝑃
𝑅1 𝑅2
+
–
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Primary Coil
Secondary Coils
Moving
Core
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Primary Coil
Secondary Coils
Moving
Core
𝑒𝑠,1 = 𝑀1
𝑑𝑖𝑃
𝑑𝑡
𝑒𝑠,2 = 𝑀2
𝑑𝑖𝑃
𝑑𝑡
𝑒𝑃 = 𝑀1 − 𝑀2
𝑑𝑖𝑆
𝑑𝑡
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Primary Coil
Secondary Coils
Moving
Core
𝑒𝑜𝑢𝑡 = 𝑒𝑠,2 − 𝑒𝑠,1
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Hall element
(semiconductor)
Magnet
𝑉𝑂𝑈𝑇
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Light Source
Moving Grate
Light Receiver
Collimated Beam
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