actuators Review A Review on the Control of the Mechanical Properties of Ankle Foot Orthosis for Gait Assistance Dimas Adiputra 1,2,† , Nurhazimah Nazmi 1,†, Irfan Bahiuddin 3,† , Ubaidillah Ubaidillah 4,†, Fitrian Imaduddin 4,†, Mohd Azizi Abdul Rahman 1,*,†, Saiful Amri Mazlan 1,† and Hairi Zamzuri 1 1 Advanced Vehicle System Laboratory, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Malaysia;
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[email protected] (H.Z.) 2 Electrical Engineering Department, Institut Teknologi Telkom Surabaya, Surabaya 60234, Indonesia 3 Vocational School, Universitas Gadjah Mada, Jogjakarta 55281, Indonesia;
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[email protected] † These authors contributed equally to this work. Received: 20 December 2018; Accepted: 24 January 2019; Published: 28 January 2019 Abstract: In the past decade, advanced technologies in robotics have been explored to enhance the rehabilitation of post-stroke patients. Previous works have shown that gait assistance for post-stroke patients can be provided through the use of robotics technology in ancillary equipment, such as Ankle Foot Orthosis (AFO). An AFO is usually used to assist patients with spasticity or foot drop problems. There are several types of AFOs, depending on the flexibility of the joint, such as rigid, flexible rigid, and articulated AFOs. A rigid AFO has a fixed joint, and a flexible rigid AFO has a more flexible joint, while the articulated AFO has a freely rotating ankle joint, where the mechanical properties of the AFO are more controllable compared to the other two types of AFOs.