Sistem rem ABS dengan sensor wheel speed mengurangi ‘wheel lock’ dengan mengeset parameter 'prosentase skid' 20% secara statis, sehingga tidak bisa mengatasi ketidak-stabilan arah kendaraan bila terjadi under/oversteer apalagi sliding. Dengan ditambahkan rancang bangun sensor 'sudut steer', ‘yaw-rate’, ‘centrifugal force'dan pengaturan dilakukan dengan mengurangi prosentase skid pada roda yang sesuai secara dinamis pada rancang bangun 'pumpless hydraulic unit’ maka arah kendaran dapat lebih terkendali karena respon arah mendekati perilaku ackerman. Komparasi antara ABS single control (parameter skid) dengan ABS multi control (ABS single control yang sudah ditambah sensor yawing , centrifugal force dan sudut steer) dilaksanakan melalui quasi dynamic dan test drive. Hasil ekspcrimen membuktikan adanya perbaikan kontrol dan response indek steering direction sebesar 67% saat pengereman dengan kecepatan awal 45 km/jam dan sebesar 66,7% pada kecepatan awal 50 km/jam dengan radius belok 12,5 m di medan lapangan kering.


Alt. Description

Antilock Brake System has been applied wheel speed sensor to reduce 'wheel lock' by setting percentage skid parameter at 20% statically, where could not guaranty directional stability of vehicle if under/oversteer or sliding are mainly occur. Supporting by application of yaw rate sensor , steering angle sensor and centrifugal acceleration sensor and to control the directional vehicle response unit control reduces the setting percentage skid of desired wheel dynamically by using the design of 'pumpless hydraulic unit’. This modification results the vehicle motion response will be Ackerman vehicle directional motion character approximately. Simulation and test drive are taken care of to make comparation between Single control ABS and Multi Control ABS (Equipped by application of yaw rate, steering angle, centrifugal acceleration sensors). The validation prove that Multi Control ABS improve control and response of steering direction 67% as full braking while turning at 45 km/h initial speed and 66,7% At 50 km/h initial speed. The radius of turning 17,5 m and use the foot ball field as the ground.