Abstract: Taking a heavy duty commercial vehicle cab as research objects, the ergonomic
engineering characteristics of this cab is analyzed and optimization promotion targets determined by
professional subjective drive and evaluation for ergonomics. The optimization design is analyzed by
ergonomic analysis tools in CATIA, and optimization path and method are provided. After which
ergonomic engineering characteristics of optimized cab is drove and evaluated subjectively again.
Compared with original design, the ergonomics of cab after optimizing are improved a lot. All these
analysis can provide some experience and way to ergonomic analysis and design optimization for
heavy duty commercial vehicle cab.

Key words: heavy-duty commercial vehicle, cab, ergonomics, subjective drive and evaluation;
optimization design