Inverse dynamics simulation and quantitative evaluation of comfort level for brake operations on workover rig

In order to perform quantitative evaluation for operating posture comfort level of workover rig operators in a more scientific manner, a digital human body model for Chinese adult males with the 50th percentile was established in AMS, the Biomechanical analysis software, based on GB10000-88 anthropometric data of Chinese adults; moreover, specific to brake operation on the workover rig, inverse dynamics simulation was carried out. By regarding the maximum muscle activity of muscle groups related to such an operation as an evaluation indicator, while the relative position of hand brake system as a variable, a quantitative evaluation model is set up for the comfort level of operating postures. In addition, the software SPSS was also adopted to process inverse dynamics simulation results to obtain the corresponding multiple linear regression model; hence, more accurate and more reliable mathematical basis could be provided for the ergonomic evaluations on workover rig as well as the layout optimization of operating cabin.