초록 ▼

A low-speed antiskid control for a multigain hydraulic valve brake system for an airplane is disclosed. The antiskid control includes low- and high-pressure bias modulation (PBM) high step thresholds. At high speeds the low PBM threshold is used to control a PBM high step firing. At low speeds, the

A low-speed antiskid control for a multigain hydraulic valve brake system for an airplane is disclosed. The antiskid control includes low- and high-pressure bias modulation (PBM) high step thresholds. At high speeds the low PBM threshold is used to control a PBM high step firing. At low speeds, the high PBM threshold is used to prevent a PBM high step firing unless a deep skid is occurring. The use of a high threshold at low airplane speeds prevents a low speed control loss due to PBM high step firing reducing brake pressure to below minimum brake contact pressure.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.]1. In an antiskid control system for a multigain hydraulic brake system that includes a multigain antiskid hydraulic valve, an integral-based pressure bias modulation control algori

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.]1. In an antiskid control system for a multigain hydraulic brake system that includes a multigain antiskid hydraulic valve, an integral-based pressure bias modulation control algorithm for producing an antiskid control current for application to said multigain antiskid hydraulic valve, and a pressure bias modulation high step current that overrides the antiskid control current when the antiskid control current exceeds a pressure bias modulation threshold, the improvement comprising dual pressure bias modulation thresholds, one threshold being active at low wheelspeeds and the other being active at high wheelspeeds.