As shown, fatigue of the muscle is characterized by one of extreme points of the phase shift function. The paper presents the analysis of relevant digital methods alongside with the formulae for the calculation of major mechanical characteristics when the relationship of a muscle biosignal that is presented in a graphical way. Abstract: Based on biosignal energy equality to the work performed by a muscle, in the estimation of energy dissipation within a biolotronic system, analytical expressions have been derived that have helped to calculate major mechanical characteristics of the muscle including elongation of the muscle, speed and acceleration of such elongation. After test, MF of manual and automatic group increases (SlopeAD =- 0.01, SlopeMD =- 0.058), which shows that driving on grassland highway can lead to the driver’s muscle fatigue with the extension of time and vehicle operating system leads to different degree of muscle fatigue. The results show that the automatic driver’s MF has significantly negative correlation (P =- 0.521) before and after the static test, which suggests automatic driver will be afflicted with shoulder muscle fatigue The manual drive’s MF before and after the test tends to decrease with time (SlopeMS =- 0.0076, SlopeMD =- 0.0582), which suggests that after test, drivers in manual group are in the right shoulder fatigue, and before test, the decline of MF shows the drivers’ fatigue accumulation. We devide the drivers into 2 groups (5 drivers in manual group, 5 drivers in automatic group). In this paper, we study the manual and automatic driver’s shoulder muscle fatigue with method of frequency domain analysis through testing the driver, obtaining MF of trapezius muscle in static measurement and the surface electronical signal of the trapezius muscle after 110 minutes’ driving. In order to explore the pilot fatigue characteristics in grassland under different operation conversion highway, put forward the fatigue improve measures and improving the quality of driving, I use the real driving test. And vehicle operating system leads to different degree of muscle fatigue. On the grassland highway, the driver is prone to muscle fatigue because of the particularity of its landscape and the linear structure. Guides to the Evaluation of Permanent Impairment, Edition 5. “It is probably not an exaggeration to compare the manual muscle testing of muscular strength to auscultation of the heart without a stethoscope.
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