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Table 1 Overview of the neuro-control capabilities of the device

From: EMG-driven control in lower limb prostheses: a topic-based systematic review

Ref.

Control strategy

Neuro-control

Actuator control signal

Joint

Platform

[64]

IEC

Direct control on the joint lock mechanism

Switch signal of the electromagnetic clutch

Knee

E.C.P. (Electro-Control Prosthesis)\(^{{\star } {\dag }}\)

[29]

IEC

Voluntary control of joint FE

Servo-amplifier electrohydraulic valve level

Knee

Prosthesis simulator (hydraulic system externally supplied and controlled)\(^{{\star } {\dag }}\)

[24,25,26,27]

IEC

Voluntary control of joint FE

Joint angle reference

Knee

ABS\(^{\star }\); off-line VS\(^{\dag }\)

[56]

IEC

Voluntary control of joint FE

Joint torque reference

Knee

Vanderbilt micro-controlled leg prosthesis\(^{{\star } {\dag }}\)

[14, 23, 62, 63]

IEC

Voluntary control of joint FE

Joint torque reference

Knee

Clarkson university knee powered prosthesis prototype\(^{{\star } {\dag }}\)

[57]

IEC

Voluntary control of joint FE and IE

Joint torque reference

Knee, ankle

Virtual environment\(^{\star }\), powered knee prosthesis prototype (Center for Bionic Medicine, Rehabilitation Institute of Chicago)\(^{\dag }\)

[37]

IEC

Direct control on joint angle movement

Joint angle reference

Ankle

Passive prosthetic feet\(^{\star }\); on-line VS\(^{\dag }\)

[16]

IEC

Voluntary control of joint FE

Joint angular velocity

Ankle

On-line VS\(^{{\star } {\dag }}\)

[67, 68]

IEC

Voluntary control of joint FE

Force reference of artificial pneumatic muscles

Ankle

Artificial pneumatic muscles powered ankle prosthesis prototype (University of Michigan)\(^{{\star } {\dag }}\)

[76]

IEC

Voluntary control of joint FE

Joint angle reference

Ankle

On-line VS\(^{{\star } {\dag }}\); ankle prototype \(^{\dag }\)

[11]

IEC

Voluntary control of joint FE

Joint angle reference

Knee, ankle

ABS\(^{\star }\); off-line VS\(^{\dag }\)

[39, 40]

IEC

Voluntary control of joint FE

Joint torque reference

Ankle

On-line VS\(^{{\star } {\dag }}\)

[98]

CIC

Control of walking control ground-level or slopes

NI

Knee

Four-bar linkage mechanism, Ottobock\(^{\star }\); Endolite, Blatchford\(^{\star }\)

[70]

CIC

Adaptive control based on locomotion recognition

Stepper motor control driving a gear train

Knee

Prototype leg prosthesis (step motor driving the shaft of six-bar knee)\(^{{\star } {\dag }}\)

[5]

CIC

Transition between level-ground to stairs intrinsic adaptive control

Joint position/torque (control state dependent)

Ankle

On-line VS\(^{\star }\); BiOM ankle-foot prosthesis, MIT Media Lab\(^{\star }\)

[65, 66, 141, 144]

CIC

Adaptive control based on locomotion recognition

NI

Knee

Mauch SNS, Össur\(^{\star }\); off-line VS\(^{\dag }\)

[66]

CIC

Adaptive control based on locomotion recognition

NI

Knee

Hydraulic passive knee\(^{\star }\); off-line VS\(^{\dag }\)

[53]

CIC

Adaptive control based on locomotion recognition

Position and velocity joint trajectory

Knee, ankle

NS\(^{\star }\); off-line VS\(^{\dag }\)

[85]

CIC

Adaptive control based on walking phase recognition

NI

Knee

ABS\(^{\star }\); off-line VS\(^{\dag }\)

[15, 110]

CIC

Adaptive control based on walking phase recognition

NI

Knee

ABS\(^{\star }\); off-line VS\(^{\dag }\)

[32, 33, 143]

CIC

Adaptive control based on locomotion recognition

NI in passive MLLPs; joint torque for active MLLP

Knee

Knee–ankle powered prototype\(^{{\star } {\dag }}\)

[86, 87]

CIC

Adaptive control based on locomotion recognition

NI

Ankle

Passive ankle\(^{\star }\); off-line VS\(^{\dag }\)

[120]

CIC

Joint DoF motion determination

NS

Ankle

On-line VS\(^{{\star } {\dag }}\)

[58, 111]

CIC-IEC

Adaptive control based on locomotion recognition; non-weight bearing voluntary control of joints FE

Joint torque reference

Knee, ankle

Vanderbilt micro-controlled leg prosthesis\(^{{\star } {\dag }}\)

[59, 113, 114, 139, 140]

CIC

Adaptive control based on locomotion recognition

Joint torque reference

Knee, ankle

Vanderbilt micro-controlled leg prosthesis\(^{{\star } {\dag }}\)

[17]

CIC

Adaptive control based on terrain slope estimation

Joint damping reference

Ankle

Peking university PKU-RoboTPro\(^{{\star } {\dag }}\)

[106]

CIC

EMG-triggered stride motion routine

Motor current reference

Knee

Prototype leg prosthesis\(^{{\star } {\dag }}\)

[54, 55]

CIC

Adaptive control based on locomotion recognition

NI

Ankle

ABS\(^{\star }\); off-line VS\(^{\dag }\)

[6]

IEC

Voluntary control of joint FE

Joint angle reference

Ankle

On-line VS\(^{{\star } {\dag }}\)

[61]

IEC

Voluntary control of joint FE

Joint torque reference

Knee

ABS with ABA and powered knee prosthetic prototype\(^{{\star } {\dag }}\)

[136]

IEC

Voluntary control of joint FE

Joint torque reference

Knee

ABS with ABA and Vanderbilt micro-controlled leg prosthesis\(^{{\star } {\dag }}\)

[71, 72, 130]

CIC-IEC

Voluntary control of joint FE

Joint torque reference

Ankle

BiOM ankle-foot prosthesis, MIT Media Lab\(^{{\star } {\dag }}\)

[19]

IEC

Voluntary control of joint FE

Joint torque reference

Knee

ABS\(^{\star }\); on-line VS\(^{\dag }\)

  1. Fields include: paper reference; control strategy (the neural control strategy used for the high-level control function implementation: CIC or IEC); neuro-control (the use of input neural signals for the generated output movement); actuator control signal (the output signal from the high-level EMG-driven control); joint (the controlled lower limb joint); platform (the device used for acquisition and testing)
  2. NI not implemented, NS not stated, IEC interactive extrinsic contro, CIC computational intrinsic contro, FE flexion-extension; IE internal-external rotation, DoF Degrees of Freedom, ABS able-bodied subjects, ABA able-body adaptor, VS virtual simulator
  3. \(^{\star }\)Platform for data acquisition
  4. \(^{\dag }\)Platform for control testing