1. Department of Mechanical Engineering Texas A&M University College Station TX 77843 USA
2. Department of Mechanical Engineering The Hong Kong Polytechnic University Hong Kong 999077 China
3. Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Hong Kong 999077 China
4. Department of Electrical and Computer Engineering University of California Riverside CA 92521 USA
5. Department of Materials Science and Engineering Texas A&M University College Station TX 77840 USA
6. Department of Aerospace Engineering Texas A&M University College Station TX 77843 USA