Speed responsive systems

摘要: A system for controlling the speed of a motor vehicle has detector which produces first electrical signal having mean level relating to actual and an alternating component whose amplitude is also related vehicle. memory provided storing second required substantially free any component. comparator compares signals therefore error corresponding difference (if any) between speed. servo responds adjust towards value. relationship-varying circuit varies relationship thus increases overall gain at higher speeds. tuning tunes so as provide increased frequency tends hunt.